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  • Organic Chemistry  (3,146)
  • Seismology  (53)
  • Aircraft Design, Testing and Performance  (47)
  • Witterung  (31)
  • AERODYNAMICS
  • Animals
  • 1940-1944  (1,586)
  • 1925-1929
Collection
Keywords
Years
Year
  • 1
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    In:  Bull. Seism. Soc. Am., Milano, Gustav Fischer, vol. 31, no. 6, pp. 263-302, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1941
    Keywords: Tectonics ; Seismicity ; Seismology ; BSSA
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  • 2
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    In:  Earthquake Notes, Milano, Gustav Fischer, vol. 13, no. 6, pp. 4, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1941
    Keywords: Seismology ; Gravimetry, Gravitation
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  • 3
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    In:  Bull. Geol. Soc. Am., Milano, Gustav Fischer, vol. 54, no. 6, pp. 499-526, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1943
    Keywords: Seismology ; Earth model, also for more shallow analyses !
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  • 4
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    In:  Bull. Seism. Soc. Am., Milano, Gustav Fischer, vol. 32, no. 6, pp. 163-192, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1942
    Keywords: Seismology ; Magnitude ; Energy (of earthquakes) ; Intensity ; Strong motions ; BSSA ; FROTH ; (abstract)
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  • 5
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    In:  Gerlands Beitr. Geophys., Amsterdam, Schweizerbart'sche Verlagsbuchhandlung, vol. 19, no. 12, pp. 73-98, pp. L12S09, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Publication Date: 1928
    Keywords: AUD ; Magnitude ; Location ; Seismology ; Nearfield
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  • 6
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    Gustav Fischer
    In:  Veröffentlichungen der Reichsanstalt für Erdbebenforschung in Jena, Jena, Gustav Fischer, vol. 3, no. 3, pp. 29-48 + 18 S. Tafeln, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1925
    Keywords: Earthquake ; Seismology
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  • 7
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    In:  Zeitschrift für Geophysik, Jena, Gustav Fischer, vol. 1, no. 3, pp. 165-166, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1925
    Keywords: NOISE ; Seismology
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  • 8
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    In:  Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft, Jena, Gustav Fischer, vol. 40, no. 3, pp. 57-88, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1925
    Keywords: Earthquake catalog ; Seismology ; Earthquake
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  • 9
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    In:  Zeitschrift für Geophysik, Jena, Gustav Fischer, vol. 2, no. 3, pp. 24-29, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1926
    Keywords: Earth model, also for more shallow analyses ! ; Seismology
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  • 10
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    In:  Gerlands Beiträge zur Geophysik, Jena, Gustav Fischer, vol. 15, no. 3, pp. 51-63, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1926
    Keywords: Seismology ; Seismicity
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  • 11
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    In:  Zeitschrift für Geophysik, Jena, Gustav Fischer, vol. 3, no. 3, pp. 328-329, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1927
    Keywords: NOISE ; Seismology
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  • 12
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    In:  Zeitschrift für Geophysik, Jena, Gustav Fischer, vol. 4, no. 3, pp. 246-250, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1928
    Keywords: NOISE ; Seismology
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  • 13
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    In:  Bull. Geol. Soc. Am., Milano, Gustav Fischer, vol. 53, no. 6, pp. 1818-1819, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1942
    Keywords: Seismology ; Earth model, also for more shallow analyses ! ; CRUST
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  • 14
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    In:  Bull. Geol. Soc. Am., Milano, Gustav Fischer, vol. 54, no. 6, pp. 473-498, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1943
    Keywords: Seismology ; Earth model, also for more shallow analyses !
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  • 15
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    In:  Trans., Am. Geophys. Union, Milano, Gustav Fischer, vol. 24, no. 6, pp. 95-96, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1943
    Keywords: Seismology ; Seismicity ; EOS
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  • 16
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    Bornträger
    In:  Berlin, 8 + 168 S., Bornträger, vol. 3, no. Subvol. b, pp. 220, (ISBN 0-12-305355-2)
    Publication Date: 1925
    Keywords: Textbook of geophysics ; Seismology ; Earth model, also for more shallow analyses !
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  • 17
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    Bornträger
    In:  Professional Paper, Lehrbuch der Geophysik, Berlin, 6 + 1017 pp., Bornträger, vol. 3, no. VIIa, pp. 612-617, (ISBN: 3-540-23712-7)
    Publication Date: 1926
    Keywords: Applied geophysics ; Seismology ; Seismics (controlled source seismology)
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  • 18
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    Bornträger
    In:  Professional Paper, Lehrbuch der Geophysik, Berlin, 6 + 1017 pp., Bornträger, vol. 3, no. VIIa, pp. 434-499, (ISBN: 3-540-23712-7)
    Publication Date: 1926
    Keywords: Seismology ; Earth model, also for more shallow analyses !
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  • 19
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    Bornträger
    In:  Professional Paper, Handbuch der Geophysik, Volume 4: Erdbeben (finished), 12 + 1202 S., Berlin, Bornträger, vol. 3, no. VIIa, pp. 151-263, (ISBN: 3-540-23712-7)
    Publication Date: 1929
    Keywords: Review article ; Seismology ; Instruments ; Seismometer
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  • 20
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    Geological Society of America
    In:  Professional Paper, Geology 1888-1938, 50th Anniversary Volume, New York, Geological Society of America, vol. 3, no. VIIa, pp. 438-470, (ISBN: 3-540-23712-7)
    Publication Date: 1941
    Keywords: Review article ; Seismology
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  • 21
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    In:  Bull. Seism. Soc. Am., Milano, Gustav Fischer, vol. 34, no. 6, pp. 137-160, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1944
    Keywords: Seismology ; Reflectivity ; Nearfield ; BSSA
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  • 22
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    California Institute of Technology Pasadena
    In:  Seismological Laboratory Bulletin, Milano, California Institute of Technology Pasadena, vol. 1942, no. 6, pp. 115, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1944
    Keywords: Seismology ; Earthquake catalog ; Seismicity
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  • 23
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    In:  Bull. Seism. Soc. Am., Milano, California Institute of Technology Pasadena, vol. 34, no. 6, pp. 185-188, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1944
    Keywords: Seismology ; Seismicity ; BSSA
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  • 24
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    In:  Bull. Geol. Soc. Am., Milano, Gustav Fischer, vol. 52, no. 6, pp. 1950, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1941
    Keywords: Tectonics ; Seismicity ; Seismology
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  • 25
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    In:  Bull. Seism. Soc. Am., Milano, Gustav Fischer, vol. 34, no. 6, pp. 85-102, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1944
    Keywords: Seismology ; Reflectivity ; Energy (of earthquakes) ; Refraction seismics ; BSSA
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  • 26
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    California Institute of Technology Pasadena
    In:  Seismological Laboratory Bulletin, Milano, California Institute of Technology Pasadena, vol. 1941, no. 6, pp. 98, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1944
    Keywords: Seismology ; Earthquake catalog ; Seismicity
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  • 27
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    California Institute of Technology Pasadena
    In:  Seismological Laboratory Bulletin, Milano, California Institute of Technology Pasadena, vol. 1943, no. 6, pp. 140, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1944
    Keywords: Seismology ; Earthquake catalog ; Seismicity
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  • 28
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    In:  Physikalische Zeitschrift, Jena, Gustav Fischer, vol. 26, no. 3, pp. 258-260, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1925
    Keywords: Earth model, also for more shallow analyses ! ; Seismology
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  • 29
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    In:  Die Naturwissenschaften, Jena, Gustav Fischer, vol. 13, no. 3, pp. 360-362, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1925
    Keywords: Earth model, also for more shallow analyses ! ; Seismology ; Velocity analysis
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  • 30
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    In:  Physikalische Zeitschrift, Jena, Gustav Fischer, vol. 27, no. 3, pp. 111-114, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1926
    Keywords: Seismology ; Group veloc.
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  • 31
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    In:  Zeitschrift für Geophysik, Jena, Gustav Fischer, vol. 2, no. 3, pp. 305-309, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1926
    Keywords: Travel time ; Seismology
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  • 32
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    In:  Gerlands Beiträge zur Geophysik, Jena, Gustav Fischer, vol. 17, no. 3, pp. 356-365, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1927
    Keywords: Travel time ; Earth model, also for more shallow analyses ! ; Seismology ; Body waves ; Velocity depth profile
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  • 33
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    In:  Gerlands Beiträge zur Geophysik, Jena, Gustav Fischer, vol. 18, no. 3, pp. 379-382, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1927
    Keywords: Earthquake ; Hypocentral depth ; Seismology
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  • 34
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    In:  Forschungen und Fortschritte, Jena, Gustav Fischer, vol. 4, no. 3, pp. 357-358, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1928
    Keywords: NOISE ; Seismology
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  • 35
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    In:  Scientia, Milano, Gustav Fischer, vol. 23, no. 3, pp. 375-384, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1929
    Keywords: Seismology ; Geothermics ; Seismicity ; Tectonics
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  • 36
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    In:  Physikalische Zeitschrift, Milano, Gustav Fischer, vol. 30, no. 3, pp. 230-231, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1929
    Keywords: Seismology ; Elasticity ; Waves ; Inelastic ; Fluids
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  • 37
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    In:  Gerlands Beiträge zur Geophysik, Milano, Gustav Fischer, vol. 22, no. 3, pp. 100-102, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1929
    Keywords: Seismology ; Seismometer ; Nearfield
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  • 38
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    Bornträger
    In:  Berlin, 6 + 1017 pp., Bornträger, vol. 3, no. Subvol. b, pp. 220, (ISBN 0-12-305355-2)
    Publication Date: 1926
    Keywords: Textbook of geophysics ; Seismology
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  • 39
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    British Association for the Advancement of Science, Gray Milne Trust
    In:  London, 50 pp., 4th print., 1970, British Association for the Advancement of Science, Gray Milne Trust, vol. 46, no. XVI:, pp. 1-14, (ISBN: 0-387-30752-4)
    Publication Date: 1940
    Keywords: Earth model, also for more shallow analyses ! ; Travel time ; Seismology ; Handbook of geophysics
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  • 40
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    J. A. Barth
    In:  Professional Paper, Handbuch der physikalischen und technischen Mechanik, Bd. III, Leipzig, J. A. Barth, vol. 3, no. VIIa, pp. 387-420, (ISBN: 3-540-23712-7)
    Publication Date: 1927
    Keywords: Seismology ; Seismicity ; Waves
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  • 41
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    In:  Landwirtschaftl. Jahrbuch 64:241-296
    Publication Date: 1926
    Description: Zusammenhang zwischen Niederschlag, Temperatur und Erträgen. Untersucht wurden Winterweizen, Winterroggen, Sommergerste, Sommerroggen, Kartoffeln, Futterpflanzen und Wiesen KATASTER-BESCHREIBUNG: Einfluss der Witterungsfaktoren Niederschlag und Temperatur auf die Ernteerträge KATASTER-DETAIL: Delta Nied +, dann Erträge (Halmfrüchte und Kartoffeln) + und später -; Delta T -, dann Erträge +,
    Keywords: Deutsches Reich (östl. u. westl. Provinzen, Hannover, Sachsen, Rheinland) ; 1899-1913 ; Ertrag ; Getreide ; Rangordnungsmethode ; Witterung ; Hackfrüchte
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  • 42
    Publication Date: 1926
    Description: Abhängigkeit der Getreideerträge von Witterungseinflüssen mithilfe der Korrelationsmethode in 11 orographisch abgegrenzen Gebieten KATASTER-BESCHREIBUNG: Korrelation zwischen der Abweichung vom 11, bzw. 30jährigen monatlichen Mittel (April-Juli) der Niederschläge und dem Ertrag von Getreidearten (Weizen, Dinkel, Roggen, Gerste, Hafer) KATASTER-DETAIL: Nied 〉 (11, bzw. 30jährigen monatlichen Mittel von 1888-1898 und 1888-1917 im Monat Mai, je nach Region 55-158mm), dann höchste Übereinstimmung der Korrelationskoeffienten für die Ertragszunahme über alle Kulturen
    Keywords: Baden ; 1888-1898 und 1888-1917 ; Ertrag ; Getreide ; Korrelationsmethode ; Niederschlag ; Temperatur ; Witterung
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  • 43
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    In:  Vereinigten Friedrichs-Universität Halle-Wittenberg, Halle.
    Publication Date: 1928
    Description: Ertragsrelevante Korrelationen bei Winterweizen und -gerste mit der Temperatur, bei allen übrigen Kulturen war Niederschlag entscheidend KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Saalkreis, Kreis Bitterfeld, Kreis Delitzsch, Kreis Wittenberg, südl. Teil Kreis Köthen ; 1900-26 ; Kartoffeln ; Boden ; Ertrag ; Getreide ; Hafer ; Niederschlag ; Rangordnungsmethode ; Roggen ; Temperatur ; Weizen ; Witterung ; Hackfrüchte
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  • 44
    Publication Date: 1929
    Description: Ergebnisse (Rangordungs- und Korrelationsmethode) der Beziehung zwischen Witterung und Ertrag vieler Kulturen eingeteilt nach Monaten KATASTER-BESCHREIBUNG: Einfluss der Temperatur und des Niederschlags auf den Ertrag folgender Kulturpflanzen: Winterweizen, Winterroggen, Dinkel, Sommerweizen, Sommerroggen, Sommergerste, Hafer, Hopfen, Luzerne, Rotklee, Wiesen, Kartoffeln) KATASTER-DETAIL: Delta T (Vegetationszeit) -, dann Ertrag (Winter- und Sommergetreide) +; Delta T (Winter, Juni und Juli) -, dann Ertrag (Sommergetreide) +; Delta Nied (Winter) +, dann Ertrag (Getreide) -; Delta T (September) - und Delta Nied (Vegetationszeit) +, dann Ertrag (Futterpflanzen) +; Details für einzelne Kulturpflanzen: siehe Artikel
    Keywords: Württemberg ; 1899-1913 ; Ertrag ; Hafer ; Korrelationsmethode ; Niederschlag ; Rangordnungsmethode ; Temperatur ; Weizen ; Witterung
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  • 45
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    In:  Ztschr. angew. Ent. 29: 412-441 u. 601-635
    Publication Date: 1942
    Description: Beschreibung der Biologie der Buschhornblattwespe vom Schlüpfen, über die Entwicklung bis hin zum Überliegen und die abiotischen Sterlichkeitsursachen, u.a. witterungsbedingt KATASTER-BESCHREIBUNG: Beginn der Frühjahrsgeneration ist klima- und wetterbedingt, unter günstigen Bedingungen (milder Winter) bereits im Januar Beginn der Entwicklung und Schlupfbeginn ab Anfang April KATASTER-DETAIL: Tmit- (Spätfrühjahr und Frühwinterwitterung) , dann Schlupfbeginn später und Anteil der Überlieger höher
    Keywords: Mecklenburg-Vorpommern ; 1937-1940 ; Insekten ; Kiefer ; Pflanzenschädling ; Temperatur ; Vegetationsperiode ; Wachstum ; Witterung
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  • 46
    Publication Date: 1929
    Description: Einfluss der Witterung ist Gattungs- teils sortenabhängig, und wechselt mit der Lage der Orte. Trockenheit im Vorjahr begünstigt die Ernteerträge, KATASTER-BESCHREIBUNG: Trockenheit im Vorjahr begünstigt verbunden mit hoher Temperatur, geringer Luftfeuchtigkeit und langer Sönnenscheindauer, mit niedriger Temperatur, hoher Luftfeuchte, kurzer Sonnenscheindauer im Erntejahr, wirkt positiv auf die Ernteerträge für bestimmte Apfel - und Birnensorten, umgekehrte Beziehung insbesondere bei Früh-, Herbst- und Winterbirnensorten KATASTER-DETAIL:
    Keywords: Niedersachsen ; 1900-1923 ; Apfel ; Ertrag ; Trockenheit ; Witterung ; Obst ; Birne
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  • 47
    Publication Date: 1929
    Description: vgl. Neustädt KATASTER-BESCHREIBUNG: Zusammenhang Witterungsfaktoren in wachstumsrelevanten Zeitspannen mit dem Ertrag verschiedener Kulturen KATASTER-DETAIL: Delta Nied (Oktober bis März) -, dann Erträge (Roggen) +; Delta Nied (Januar) -, dann Erträge (Roggen) ++; Delta Nied (Februar) +, dann Erträge (Roggen) +; Delta Nied (Mai) +, dann Erträge (Roggen) +; Delta Nied (Mai) 〉 1,5x Mittel, dann Erträge -; Delta Sonn (Mai, im Bezirk Köthen) +, dann Erträge (Roggen) -; Delta Nied (Januar, März, April) -, dann Erträge (Sommergerste) +; Delta Nied (Februar, Mai bis Ernte) +, dann Erträge (Sommergerste) +; Delta Nied (Mai) +, dann Erträge (Sommergerste) ++; (Informationen zu den weiteren landwirtschaftlicher Kulturpflanzen: siehe Artikel)
    Keywords: Mitteldeutschland ; 1900-1926 ; Kartoffeln ; Ertrag ; Niederschlag ; Roggen ; Temperatur ; Witterung ; Hackfrüchte
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  • 48
    Publication Date: 1929
    Description: Einfluß der Witterung auf die Qualität von Weizen KATASTER-BESCHREIBUNG: Witterungsverhältnisse der letzten 5 bis höchstens 10 Tage vor der Gelbreife sind von entscheidendem Einfluss, Backqualität nimmt von kontinentalem zum maritimen Klima ab KATASTER-DETAIL: Tmit+, Sonn+, Nied-, dann gute Qualität Nied+, dann Tausendkorngewicht + aber Nied**, dann Tausendkorngewicht - und N-Gehalt +
    Keywords: Mitteldeutschland ; 1900-1925 ; Ertrag ; Korrelationsmethode ; Landwirtschaft ; Niederschlag ; Temperatur ; Trockenheit ; Weizen ; Witterung ; Sonnenscheindauer
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  • 49
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    In:  Kühn-Archiv, Berlin, Band XX, Seite 223-301
    Publication Date: 1928
    Description: Auswertung von 27 Versuchsjahren, Bestimmung einer kritischen Periode für die Mindestniederschlagshöhe durch Auswertung der Klimaparmeter in einzelnen Bezirken mittels Rangkorrelationskoeffizienten KATASTER-BESCHREIBUNG: Zusammenhang zwischen der Niederschlagshöhe und dem Ertrag von Zuckerrüben, Zusammenhang zwischen der Sonnenscheindauer und dem Zuckergehalt von Zuckerrüben KATASTER-DETAIL: Delta Nied+: Nied 〉 175 mm (Juli-September), dann Ertragssteigerung bei ZR; Delta Sonn +: Sonn〉 4.43 h (September -Oktober), dann hohe Zuckergehalte bei ZR
    Keywords: Sachsen-Anhalt ; 1900-1926 ; Zuckerrüben ; Niederschlag ; Rangordnungsmethode ; Temperatur ; Witterung
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  • 50
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    In:  Landwirtschaftl. Jahrbuch 68:642-686
    Publication Date: 1942
    Description: Ableitung kritischer Faktoren (Temperaturoptima und Wasserversorgung) in einzelnen Wachstumsstadien KATASTER-BESCHREIBUNG: Zusammenhang zwischen Temperaturänderung während der Blüte von Weizen und dem Ertrag KATASTER-DETAIL: Delta T + und -: Tmit von 14-15°C, Änderung um +1 K auf 16°C, aber auch Rückgang um 2K auf 13°C, dann Rückgang des Ertrages
    Keywords: Kölner Bucht ; 1907-37 ; Boden ; Ertrag ; Korrelationsmethode ; Niederschlag ; Roggen ; Temperatur ; Weizen ; Witterung ; Düngung ; Hackfrüchte
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  • 51
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    In:  Landw. Jahrbuch 68:537-558
    Publication Date: 1929
    Description: Untersuchungen der Beziehungen zwischen Pferdebohne (Vicia faba L.) und der Witterung. Einteilung des Wachstums in Abschnitte KATASTER-BESCHREIBUNG: Einfluss der Witterung auf die Entwicklung und den Ertrag der Pferdebohne KATASTER-DETAIL: Delta T + und Delta Sonn +, dann Reife + (früher); Delta T +, dann 1. Wachstumsabschnitt (vom Auflaufen bis zum Blütebeginnn) - (kürzer); Delta T + und Delta Sonn +, dann 3. Wachstumsabschnitt (Reifezeit) - (kürzer); Delta T +, dann Gesamtwachstumszeit +; Delta Nied +, dann Gesamtwachstumszeit -; Delta T (Gesamtwachstumszeit,Jugendzeit) +, dann Kornzahl +; Delta Sonn (Blütezeit) +, dann Kornzahl +; Delta Nied +, dann Kornzahl -; Delta T (Reifezeit) - und Delta Nied (Reifezeit) +, dann Pilzbefall + und somit Kornzahl -; Delta T +, dann Kornschwere -; Delta Nied (10 Tage vor bis 10 Tage nach Blütenende) +, dann Kornschwere +; Delta T +, dann Hülsenzahl +; Delta Nied +, dann Hülsenzahl -; Delta Nied (alle Wachstumszeiten) + und Delta T (bis zum Blütenende) + und Delta Sonn -, dann Strohgewicht +;
    Keywords: Freising, Bayern ; 1921-1926 ; Ertrag ; Witterung ; Gemüse
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  • 52
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    In:  Deut. Landwirtschaflt. Presse 55:94-95.
    Publication Date: 1928
    Description: Übersicht über die Literatur zum Einfluss des Wetters auf die Kulturpflanzen KATASTER-BESCHREIBUNG: Milder und trockener Winter wirkt positiv auf die Weizenerträge, kalter und niederschlagsreicher Winter eher negativ, Betrachung für Norddeutschland KATASTER-DETAIL:
    Keywords: Deutschland ; 1900-1926 ; Kartoffeln ; Ertrag ; Getreide ; Hafer ; Landwirtschaft ; Niederschlag ; Roggen ; Temperatur ; Trockenheit ; Witterung ; Gerste
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  • 53
    Publication Date: 1929
    Description: Einfluss der Witterungsfaktoren auf verschiedene Kulturen und die Betriebssysteme KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Deutschland ; Witterung
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  • 54
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    In:  Zeitschrift für Pflanzenernährung, Düngung, Bodenkunde 6:490-496.
    Publication Date: 1927
    Description: Einfluss der Witterungsfaktoren Niederschlag, Temperatur und Sonnenscheindauer auf die Erträge KATASTER-BESCHREIBUNG: Einteilung der Temperatur in Klassen (stark, mittel, gering) und die Beurteilung auf die Erträge in den 6 Provinzen des deutschen Reiches, mit Vermehrung der Niederschlage wahrend der Vegetationszeit Zunahme der Halmfrüchte und der Kartoffeln im gröBten Teile des PreuBischen Staates anfangs, jedoch nd spater wieder abnehmender Trend KATASTER-DETAIL: Delta T+ (April-Augut), dann Winterweizenerträge + in OstpreuBen, Brandenburg und Sachsen Delte T++ (April-August), dann Winterweizenerträge ++ in Ostpreußen, aber - in Brandenburg und Sachsen Delta T- (April-Augut), dann Winterweizenerträge - in Hannover und der Rheinprovinz Delta T+ (+0.1° Erhöhung Temperaturmittel der Monate April bis September), dann Kartoffel+ in OstpreuBen und Schlesien
    Keywords: Deutschland, teilw. einzelne Regionen ; 1899-1913 ; Ertrag ; Niederschlag ; Temperatur ; Witterung ; Sonnenscheindauer
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  • 55
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    In:  Die Kartoffel, S. 66
    Publication Date: 1926
    Description: Zusammenhang zwischen der Witterung und der Stärkeeinlagerung bei Kartoffeln KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Kartoffeln ; Ertrag ; Witterung
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  • 56
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    In:  Mitt. DLG, S. 128
    Publication Date: 1928
    Description: Zusammenhang zwischen der Witterung und den Knollenerträgen KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Kartoffeln ; Ertrag ; Witterung
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  • 57
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    In:  Zeitschr. Pflanzenbau 2.
    Publication Date: 1925
    Description: Zusammenhang Witterung und Knollenansatz und -gewicht bei Kartoffeln KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Kartoffeln ; Ertrag ; Witterung
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  • 58
    Publication Date: 1942
    Description: Betrachtung des Klimas (Temperatur und Niederschlag) in Dekaden und Bildung von Ertrags-, Temperatur- und Niederschlagsklassen und daraus Ableitungen über die Beziehungen Ertrag und Witterung KATASTER-BESCHREIBUNG: Einfluss der Witterung (Temperatur, Niederschlag) auf den Ertrag KATASTER-DETAIL: Delta T (März) + und Delta Nied (März) +, dann Erträge +; Delta T (April -, dann Erträge +; Delta Nied (Ende Juni,Ende Juli)-, dann Erträge + Delta T (Anfang Juli) +, dann Erträge +
    Keywords: Schlesien ; 1926-38 ; Boden ; Ertrag ; Niederschlag ; Weizen ; Witterung
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  • 59
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    In:  Kühn-Archiv 20:140-222.
    Publication Date: 1929
    Description: Untersuchungen an Ernteergebnissen mittels Rangordnungs- und Korrelationsmethode zur Abhängigkeit von den Witterungsfaktoren. Untersucht wurden die Erträge von Weizen, Roggen, Sommergerste, Hafer, Erbsen und Zuckerrüben KATASTER-BESCHREIBUNG: Einfluss der Witterung (Temperatur, Niederschlag, Sonnenscheindauer) auf die Erträge der Kurlturpflanzen KATASTER-DETAIL: Delta T (Oktober, November) - und Delta T (Januar, Februar) +, dann Erträge (Weizen) +; Delta Nied (April, Mai) + und Delta Nied (Februar, März) -, dann Erträge (Weizen) +; Delta Sonn (März) +, dann Erträge (Weizen) +; Delta Nied (Mai - Zeit des Schossens) +, dann Erträge (Roggen) +; Delta T (November) -, dann Erträge (Roggen) +; Delta Nied (April, Juni) + und Delta T (April, Juni) -, dann Erträge (Sommergerste) +; Nied (April, Juni) 〉 180mm, dann Erträge (Sommergerste) -; Delta Sonn (März, April) + und Delta Sonn (Mai) -, dann Erträge (Sommergerste) +; Delta Nied (April bis Juni) +, dann Erträge (Hafer) +; Delta Sonn (März, April) +, dann Erträge (Hafer) +; Delta T (Juni) -, dann Erträge (Hafer) +; Delta Nied (Juni, September) +, dann Erträge (Zuckerrübe) +; Delta Nied (August) +, Zuckergehalt +; Delta T (Juni) +, dann Erträge (Zuckerrübe) +; Delta Sonn (September) +, Qualität der Ernte +; Delta Sonn (März, April) + und Delta Sonn (Mai, Juni) -, dann Erträge (Getreide) +;
    Keywords: Mansfelder See- und Saalkreis, Kreis Querfurt, Kreis Merseburg ; 1900-1925 ; Zuckerrüben ; Hafer ; Niederschlag ; Roggen ; Temperatur ; Weizen ; Witterung ; Sonnenscheindauer ; Gerste ; Erbsen
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  • 60
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    In:  Der Kartoffelbau, Nr. 69
    Publication Date: 1925
    Description: Zusammenhang der Witterungselemente, insbesondere der Sommerniederschläge zum Ertrag bei Kartoffeln KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Breslau ; 1901-1921 ; Kartoffeln ; Ertrag ; Witterung
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  • 61
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    In:  Kühn-Archiv:53-78.
    Publication Date: 1925
    Description: Einführung der Rangordnungs- und Korrelationsmethode anhand langjähriger Beobachtungen, Einfluss des Niederschlages und der Temperatur auf den Ertrag von Erbsen, Kartoffeln, Weizen, Hafer und Roggen KATASTER-BESCHREIBUNG: Einfluss der Witterung (Temperatur und Niederschlag) auf den Ertrag KATASTER-DETAIL: Delta T (März und April) + und Delta Nied (März und April) -, dann Erträge (Erbsen) +; Delta T (Mai und Juni) - und Delta Nied (Mai und Juni) +, dann Erträge (Erbse) +; Delta T (Oktober Vorjahr) +, dann Erträge (Kartoffel) +; Delta T (März) + und Delta T (Mai und Juni) -, dann Erträge (Winterweizen) +; Delta Nied (Januar bis März)-, dann Erträge (Hafer) +; Delta Nied (Januar bis März)-, dann Erträge (Winterroggen) +;
    Keywords: Halle ; 1893-25 ; Kartoffeln ; Ertrag ; Fichte ; Hafer ; Korrelationsmethode ; Niederschlag ; Rangordnungsmethode ; Roggen ; Temperatur ; Weizen ; Witterung
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  • 62
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    In:  Diss., Göttingen
    Publication Date: 1925
    Description: Ergebnisse ( Korrelationsmethode) der Bezeihung zwischen Witterung und Ertrag vieler Kulturen eingeteilt nach Monaten KATASTER-BESCHREIBUNG: Beziehungen zwischen Witterung (Temperatur und Niederschlag)und Ernte KATASTER-DETAIL: Delta Nied (erste 10 Blütetage) -, dann Ertrag (Roggen) +; Delta Nied (Beginn der Blüte bis 10 tage nach Ende der Blüte)-, dann Ertrag (Winterweizen) +; Delta Nied (während der 20 Tage nach Beginn der Blüte) -, dann Ertrag (Sommerweizen) +; Delta Tmit (während der 20 Tage nach dem Aufgang) -, dann Ertrag (Hafer) +; Delta Tmin (während der 20 Tage nach dem Aufgang) -, dann Ertrag (Gerste) +; Delta Tmit (während der 20 Tage nach Beginn der Blüte) -, dann Ertrag (Kartoffeln) +; Delta Nied (vom Aufgang bis zum Beginn der Blüte) -, dann Ertrag (Erbsen) +; Delta Nied +, dann Ertrag (Vietsbohnen) +;
    Keywords: Göttingen ; 1901-1922 ; Kartoffeln ; Ertrag ; Hafer ; Korrelationsmethode ; Niederschlag ; Temperatur ; Weizen ; Witterung ; Erbsen
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  • 63
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    In:  Landw. Wochenschrift für die Provinz Sachsen und Anhalt, Hallle 18:428ff.
    Publication Date: 1928
    Description: Zusammenhang Witterung in Monaten und Gerstenertrag KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Sachsen und Anhalt ; 1920 ; Ertrag ; Getreide ; Landwirtschaft ; Niederschlag ; Temperatur ; Witterung
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  • 64
    Publication Date: 1928
    Description: Beziehung zwischen Witterung (unterteilt in einzelne Monate) und Ertragshöhe mithilfe der Rangordnungs- und der Korrelationsmethode KATASTER-BESCHREIBUNG: Einfluss der Witterung (Temperatur, Niederschlag, Sonnenscheindauer) auf den Ertrag von Winterweizen, Sommerweizen, Sommergerste, Wintergerste, Hafer und Runkelrüben auf dem Versuchsfeld (wasserundurchlässiger Boden) KATASTER-DETAIL: Delta Sonn (Oktober bis November)+, dann Erträge (Winterweizen) +; Delta Sonn (Dezember bis März)+, dann Erträge (Winterweizen) -; Delta Sonn (April) -, dann Erträge (Winterweizen) +; Delta Nied (April) +, dann Erträge (Winterweizen) +; Delta Nied (Mai, Juni und Juli) -, dann Erträge (Winterweizen) +; Delta Nied (August bis Oktober) +, dann Erträge (Winterweizen) +; Delta T (April) -, dann Erträge (Winterweizen) +; (Details sowie Informationen für Sommerweizen, Sommergerste, Wintergerste, Hafer und Runkelrüben siehe Artikel)
    Keywords: Hohenheim (Baden-Württemberg) ; 1914-25 ; Ertrag ; Getreide ; Hafer ; Klima ; Korrelationsmethode ; Niederschlag ; Rangordnungsmethode ; Temperatur ; Weizen ; Witterung ; Hackfrüchte
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  • 65
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    In:  Zeitschrift für Pflanzenernährung, Düngung, Bodenkunde 16.
    Publication Date: 1926
    Description: Beziehungen zwischen Witterung und Ernteertrag KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Hohenheim (Baden-Württemberg) ; 1914-25 ; Ertrag ; Witterung
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  • 66
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    In:  Landw. Jahrbuch Berlin 63(1):1-81
    Publication Date: 1926
    Description: Auszug aus der Diss. KATASTER-BESCHREIBUNG: Beziehungen zwischen Witterung (Temperatur und Niederschlag)und Ernte KATASTER-DETAIL:
    Keywords: Göttingen ; 1901-1922 ; Ertrag ; Korrelationsmethode ; Niederschlag ; Temperatur ; Witterung ; Hackfrüchte ; Erbsen
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  • 67
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    In:  Klima / Boden / Ernte Verlag C.V. Engelhard, Berlin. p. 7, 114-127
    Publication Date: 1942
    Description: Beziehung zwischen Witterungsablauf und Bodenzustand und deren Auswirkung auf Pflanzenwuchs und Ernte KATASTER-BESCHREIBUNG: Einfluss der Witterung auf den Ertrag von Kartoffeln KATASTER-DETAIL: Delta T (April bis Juli) -, dann Erträge (Kartoffel) +; Delta Nied (April bis Juli) -, dann Erträge (Kartoffel) -
    Keywords: Gesamtpreußen, Deutschland,Schlesien ; 1921-1932,1934 ; Zuckerrüben ; Kartoffeln ; Ertrag ; Hafer ; Landwirtschaft ; Niederschlag ; Temperatur ; Witterung ; Hackfrüchte
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  • 68
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    In:  Zeitschrift für Acker- und Pflanzenbau 3:330-334.
    Publication Date: 1926
    Description: Angabe von Niederschlagsmengen und Durchschnittstemperaturen für das ökologische Optimum bestimmter Sorten, kritische Zeiten (vor und nach der Blüte) sind hierfür entscheidend KATASTER-BESCHREIBUNG: Einfluss von Wasser und Wärme, bzw. Niederschlag und Temperatur auf den Ertrag KATASTER-DETAIL: Roggen, Weizen: Delta Nied (Beginn Blütezeit)-, dann Ertrag +; Hafer, Gerste, Kartoffel: Delta T (Beginn der Blüte) -, dann Ertrag +; Bohne: Delta T (gesamte Wachstumszeit)+ und Delta Nied (gesamte Wachstumszeit) +, dann Ertrag +
    Keywords: Göttingen ; 1901-22 ; Kartoffeln ; Ertrag ; Getreide ; Hafer ; Klima ; Korrelationsmethode ; Niederschlag ; Roggen ; Temperatur ; Weizen ; Witterung ; Hackfrüchte ; Erbsen
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  • 69
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    In:  Intern. Agrik.-Wiss. Rundsch. N.F. 1;p.406-424
    Publication Date: 1925
    Description: Der Autor fasst in einer Literaturstudie Forschungsergebnisse und -erkenntnisse von Studien zum Zusammenhang zwischen klimatischen Parametern und dem Auftreten verschiedener Pflanzenkrankheiten aus Feldversuchen zusammen und vergleicht diese mit eigenen Beobachtungen aus Indien. Aus dem Literaturstudium gewonnene Kardinalwerte für verschiedene Pflanzenkrankheiten sind enthalten. Schwerpunkte der Sammlung an Erkenntnissen stellen Indien und die USA dar. KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Indien, USA, Welt ; 1900-1925 ; Pflanzenkrankheit ; Witterung
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  • 70
    Publication Date: 1929
    Description: Lage der Hochs nördlich und südlich des 50. Breitengrades und ihre Bedeutung für die Witterung und Ernteerträge in Mitteldeutschland KATASTER-BESCHREIBUNG: KATASTER-DETAIL: Tmit+ (Janurar, Februar, März, Mai und Dezember) durch Abnahem der barometrischen Nordlagen Tmit- (August, September) durch Zunahme der barometrischen Nordlagen Nied+ (Janurar, Apri,, Mai, August, September, Dezember) durch Abnahmen der barometrischen Nordlagen (entspricht Zunahmen der Südlagen!) Nied- (Februar, März, Oktober und November) durch Abnahmen der barometrischen Nordlagen (entspricht Zunahmen der Südlagen!)
    Keywords: Deutschland ; 1900-1925 ; Luftfeuchte ; Ertrag ; Getreide ; Landwirtschaft ; Niederschlag ; Temperatur ; Trockenheit ; Witterung ; Sonnenscheindauer
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  • 71
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    In:  Georgine, Jahrgang 102, Nr. 68, p. 806-807
    Publication Date: 1925
    Description: Biologie und Bekämpfung von Fritfliege, Getreideblumenfliege, scheckige oder gelbe Halmfliege, Weizenfliege, Hessenfliege KATASTER-BESCHREIBUNG: Einfluss der Witterung (Temperatur, Niederschlag und Wind) auf die Schädlinge KATASTER-DETAIL: Delta T (Winter) +, Anzahl Maden der Halmfliege +; Delta Nied (September) + und Delta Wind (September) +, dann Hessenfliege -
    Keywords: Deutschland ; 1903-1925 ; Insekten ; Anbautermine ; Boden ; Ertrag ; Getreide ; Hafer ; Niederschlag ; Pflanzenschädling ; Temperatur ; Vegetationsperiode ; Weizen ; Wind ; Witterung ; Düngung ; Gerste
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  • 72
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    Bornträger
    In:  Berlin, Bornträger, vol. 12, 189 S., no. Subvol. b, pp. 220, (ISBN 0-12-305355-2)
    Publication Date: 1927
    Keywords: Textbook of geophysics ; Seismology
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  • 73
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    Geol. Soc. Am.
    In:  New York, 7 + 131 pp., Geol. Soc. Am., vol. 34, no. XVI:, pp. 385-389, (ISBN 0-12-305355-2)
    Publication Date: 1941
    Keywords: Seismology ; Seismicity ; Review article
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  • 74
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    Bornträger
    In:  Professional Paper, Lehrbuch der Geophysik, Berlin, 6 + 1017 pp., Bornträger, vol. 3, no. VIIa, pp. 582-611, (ISBN: 3-540-23712-7)
    Publication Date: 1926
    Keywords: Seismology ; Deep seismic sounding (espec. cont. crust) ; Seismics (controlled source seismology)
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  • 75
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    Vieweg
    In:  Professional Paper, Müller - Pouillets Lehrbuch der Physik, Bd. 5.1 Physik der Erde, Braunschweig, Vieweg, vol. 3, no. VIIa, pp. 725-736, (ISBN: 3-540-23712-7)
    Publication Date: 1928
    Keywords: Seismology ; Fluids ; Geothermics
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  • 76
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    Vieweg
    In:  Professional Paper, Müller - Pouillets Lehrbuch der Physik, Bd. 5.1 Physik der Erde, Braunschweig, Vieweg, vol. 3, no. VIIa, pp. 808-818, (ISBN: 3-540-23712-7)
    Publication Date: 1928
    Keywords: Seismology ; Geothermics ; Velocity analysis ; Earth model, also for more shallow analyses ! ; Physical properties of rocks
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  • 77
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    Bornträger
    In:  Professional Paper, Handbuch der Geophysik, Volume 4: Erdbeben (finished), 12+ 1202 S., Berlin, Bornträger, vol. 3, no. VIIa, pp. 264-298, (ISBN: 3-540-23712-7)
    Publication Date: 1929
    Keywords: Seismology ; NOISE
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  • 78
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    Bornträger
    In:  Professional Paper, Handbuch der Geophysik, Volume 4: Erdbeben (finished), 12 + 1202 S., Berlin, Bornträger, vol. 3, no. VIIa, pp. 1-150, (ISBN: 3-540-23712-7)
    Publication Date: 1929
    Keywords: Review article ; Seismology ; Waves ; Wave propagation
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  • 79
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    Institut für Meteorologie und Geophysik
    In:  Frankfurt, Institut für Meteorologie und Geophysik, vol. 12, 189 S., no. Subvol. b, pp. 220, (ISBN 0-12-305355-2)
    Publication Date: 1928
    Keywords: Seismology ; Travel time
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  • 80
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    Bornträger
    In:  Professional Paper, Lehrbuch der Geophysik, Berlin, 6 + 1017 pp., Bornträger, vol. 3, no. VIIa, pp. 220-307, (ISBN: 3-540-23712-7)
    Publication Date: 1926
    Keywords: Source ; Seismology
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  • 81
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    Vieweg
    In:  Professional Paper, Müller - Pouillets Lehrbuch der Physik, Bd. 5.1 Physik der Erde, Braunschweig, Vieweg, vol. 3, no. VIIa, pp. 737-790, (ISBN: 3-540-23712-7)
    Publication Date: 1928
    Keywords: Seismology ; Fluids ; Geothermics
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  • 82
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    Vieweg
    In:  Professional Paper, Müller - Pouillets Lehrbuch der Physik, Bd. 5.1 Physik der Erde, Braunschweig, Vieweg, vol. 3, no. VIIa, pp. 719-725, (ISBN: 3-540-23712-7)
    Publication Date: 1928
    Keywords: Earth tides ; Seismology ; Fluids ; Geothermics
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  • 83
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    University of California Press
    In:  Pacific Science Association, 6th Congress Proceedings, vol. 1, Toronto, University of California Press, vol. 10, no. GL-TR-89-0230, pp. 149-150, (ISBN 3-933346-037)
    Publication Date: 1940
    Keywords: Seismology ; Seismicity ; Hypocentral depth
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  • 84
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    In:  Bull. Seism. Soc. Am., Oxford and Edinburgh, Blackwell Scientific Publications, vol. 31, no. 19, pp. 187-224, pp. 1484, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1941
    Keywords: Seismology ; Seismicity ; BSSA
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  • 85
    Publication Date: 2013-08-31
    Description: Development work on an arrangement using ailerons and spoilers for lateral control was carried out by the Vought-Sikorsky Aircraft Division of the United Aircraft Corporation on a small commercial airplane in flight and on an airfoil in a wind tunnel. Spoiler hinge moments were reduced by aerodynamic balance. The arrangement was then built into an experimental airplane and further improvements were adopted as the result of flight and tunnel tests. The use of ailerons for lateral control with flaps up, spoilers with flaps full down, and gradual transition as the flaps are lowered was found to provide lateral control under the flight conditions for which they were best suited. The ailerons were of short span, permitting the use of long-span flaps, and were drooped to a relatively large angle when the flaps were deflected. A high maximum lift coefficient was thus attained. With large control deflections in the intermediate flap-angle range and spoiler effectiveness near neutral improved by "ventilating" the spoiler, the lateral control was satisfactory for the experimental airplane and was a definite improvement over that of a conventional control arrangement.
    Keywords: Aircraft Design, Testing and Performance
    Format: application/pdf
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  • 86
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    In:  CASI
    Publication Date: 2016-06-07
    Description: A simple, systematic, optimized vortex-lattice approach is developed for application to lifting-surface problems. It affords a significant reduction in computational costs when compared to current methods. Extensive numerical experiments have been carried out on a wide variety of configurations, including wings with camber and single or multiple flaps, as well as high-lift jetflap systems. Rapid convergence as the number of spanwise or chordwise lattices are increased is assured, along with accurate answers. The results from this model should be useful not only in preliminary aircraft design but also, for example, as input for wake vortex roll-up studies and transonic flow calculations.
    Keywords: AERODYNAMICS
    Type: NASA. Langley Res. Center Vortex-Lattice Utilization; p 325-342
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  • 87
    Publication Date: 2018-06-05
    Description: An investigation has been conducted on a full-scale model of the proposed XP-46 airplane in the N. A. C. A. full-scale wind tunnel pursuant to the request of the Amy Air Corps, Materiel Division. The primary purpose of the investigation was to determine the optimum arrangement of the various component parts to obtain the maximum high speed and to provide adequate engine cooling. Additional tests included a determination of the stalling characteristics and the effectiveness of ailerons and elevators. The profile drag of the wing was ascertained by the momentum method; the location of the transition point on the wing and the critical compressibility velocities of the various airplane components were determined from surface pressure surveys.
    Keywords: Aircraft Design, Testing and Performance
    Format: application/pdf
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  • 88
    Publication Date: 2018-06-05
    Description: An extensive series of wind-tunnel tests on a half-scale conventional, nacelle model were made by the United Aircraft Corporation to determine and correlate the effects of many variables on cooling air flow and nacelle drag. The primary investigation was concerned with the reaction of these factors to varying conditions ahead of, across, and behind the engine. In the light of this investigation, common misconceptions and factors which are frequently overlooked in the cooling and cowling of radial engines are considered in some detail. Data are presented to support certain design recommendations and conclusions which should lead toward the improvement of present engine installations. Several charts are included to facilitate the estimation of cooling drag, available cooling pressure, and cowl exit area.
    Keywords: Aircraft Design, Testing and Performance
    Format: application/pdf
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  • 89
    Publication Date: 2018-06-05
    Description: Experience has shown that the determination of the take-off and. landing characteristics of airplanes requires specialized, equipment of a high degree of precision and reliability and demands great care in the evaluation and interpretation of data. It is believed, therefore, that a description of the apparatus and methods that have been developed by the NACA for these measurements might be of considerable interest, particularly to flight-test groups that have had little experience with landing and. take-off measurements. The basic principles and essential details of the Committee's equipment are described, the methods of utilizing the apparatus and of reducing the data are explained, and sample test results are presented.
    Keywords: Aircraft Design, Testing and Performance
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  • 90
    Publication Date: 2019-06-28
    Description: No abstract available
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TN-270
    Format: application/pdf
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  • 91
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    In:  CASI
    Publication Date: 2019-06-28
    Description: This report begins with a review and analysis of the work being done to develop light airplanes in the U.S. and abroad. A technical discussion of the construction and innovations in light airplanes is then presented.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TM-311
    Format: application/pdf
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  • 92
    Publication Date: 2019-06-28
    Description: A study was made of the performance of a jet-propulsion system composed of an engine-driven blower, a combustion chamber, and a discharge nozzle. A simplified analysis is made of this system for the purpose of showing in concise form the effect of the important design variables and operating conditions on jet thrust, thrust horsepower, and fuel consumption. Curves are presented that permit a rapid evaluation of the performance of this system for a range of operating conditions. The performance for an illustrative case of a power plant of the type under consideration id discussed in detail. It is shown that for a given airplane velocity the jet thrust horsepower depends mainly on the blower power and the amount of fuel burned in the jet; the higher the thrust horsepower is for a given blower power, the higher the fuel consumption per thrust horsepower. Within limits the amount of air pumped has only a secondary effect on the thrust horsepower and efficiency. A lower limit on air flow for a given fuel flow occurs where the combustion-chamber temperature becomes excessive on the basis of the strength of the structure. As the air-flow rate is increased, an upper limit is reached where, for a given blower power, fuel-flow rate, and combustion-chamber size, further increase in air flow causes a decrease in power and efficiency. This decrease in power is caused by excessive velocity through the combustion chamber, attended by an excessive pressure drop caused by momentum changes occurring during combustion.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-WR-E-212 , NACA-ACR-E4E06
    Format: application/pdf
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  • 93
    Publication Date: 2019-06-28
    Description: Flights were made in natural icing conditions at the NACA Ice Research Project, Minneapolis, Minn. to test several designs of thermal-electric propeller de-icing blade shoes and a hub-generator design. It was found that a minimum average unit power of 2.5 watts per square inch of blade-shoe area would protect the propeller blades at the test conditions. The most satisfactory blade shoe of the three designs tested extended to the 20-percent-chord point and to 90 percent of the blade radius. A concentration of heat in the leading-edge region of this shoe was found to reduce the power input necessary for satisfactory de-icing. A satisfactory thermal design of blade shoe and a hub generator of sufficient capacity were developed.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-WR-A-47 , NACA-ARR-4A20
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  • 94
    Publication Date: 2019-06-28
    Description: The effects of changes in aileron rigging between 2 deg up and 2 deg down on the stick forces were determined from wind-tunnel data for a finite-span wing model. These effects were investigated for ailerons deflecting equally in both directions and linearly with stick deflection. Data were analyzed for a Frise, a sealed internally balanced, and a beveled-trailing-edge aileron. The results of the analysis showed that only ailerons having linear hinge-moment characteristics are unaffected by changes in rigging and indicated that ailerons having decidedly nonlinear hinge-moment-coefficient curves, particularly for deflections near 0 deg, are very sensitive to changes in rigging.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-WR-L-289 , NACA-RB-L4E11
    Format: application/pdf
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  • 95
    Publication Date: 2019-06-28
    Description: Aerodynamic characteristics of a tapered NACA 23012 airfoil with single and double perforated split flaps have been determined in the NACA 7- by 10-foot wind tunnel. Dynamic pressure surveys were made behind the airfoil at the approximate location of the tail in order to determine the extent and location of the wake for several of the flap arrangements. In addition, computations have been made of an application of perforated double split flaps for use as fighter brakes. The results indicated that single or double perforated split flaps may be used to obtain satisfactory dive control without undue buffeting effects and that single or double perforated split flaps may also be used as fighter brakes. The perforated split flaps had approximately the same effects on the aerodynamic and wake characteristics of the tapered airfoil as on a comparable rectangular airfoil.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-WR-L-373
    Format: application/pdf
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  • 96
    Publication Date: 2019-06-28
    Description: Cooling tests were made of a Northrop A-17A attack airplane successively equipped with a conventional.NACA cowling and with a wing-duct cooling system. The method of cooling the engine by admitting air from the propeller slipstream into wing ducts, passing it first through the accessory compartment and then over the engine from rear to front, appeared to offer possibilities for improved engine cooling, increased cooling of the accessories, and better fairing of the power-plant installation. The results showed that ground cooling for the wing duct system without cowl flap was better than for the NACA cowling with flap; ground cooling was appreciably improved by installing a cowl flap. Satisfactory temperatures were maintained in both climb and high-speed flight, but, with the use of conventional baffles, a greater quantity of cooling air appeared to be required for the wing duct system.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TN-813
    Format: application/pdf
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  • 97
    Publication Date: 2019-06-28
    Description: This preliminary report furnishes information on the changes in the forces on each wing of a biplane cellule for various combinations of stagger and gap, stagger and sweepback, stagger and decalage, and gap and decalage. The data were obtained from pressure distribution tests made in the atmospheric wind tunnel of the Langley Memorial Aeronautical Laboratory. Since each test was carried up to 90deg angle of attack, the results may be used in the study of stalled flight and of spinning as well as in the structural design of biplane wings.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TN-330
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  • 98
    Publication Date: 2019-06-28
    Description: In open box beams subjected to torsion, secondary stresses arise owing to lateral bending of the spar caps. The present paper outlines a simple method for estimating the magnitude of these stresses and gives the results of tests of an open box beam in the neighborhood of a discontinuity where the cover changed from the top to the bottom of the box.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-WR-L-14 , NACA-ARR-L4I23
    Format: application/pdf
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  • 99
    Publication Date: 2019-06-28
    Description: An investigation was carried out in the NACA low-turbulence tunnel to develop low-drag airfoil sections suitable for admitting air at the leading edge. A thickness distribution having the desired type of pressure distribution was found from tests of a flexible model. Other airfoil shapes were derived from this original shape by varying the thickness, the camper, the leading-edge radius, and the size of the leading-edge opening. Data are presented giving the characteristics of the airfoil shapes in the range of lift coefficients for high-speed and cruising flight. Shapes have been developed which show no substantial increases in drag over that of the same position along the chord. Many of these shapes appear to have higher critical compressibility speeds than plain airfoils of the same thickness. Low-drag airfoil sections have been developed with openings in the leading edge as large as 41.5 percent of the maximum thickness. The range of lift coefficients for low drag in several cases is nearly as large as that of the corresponding plain airfoil sections. Preliminary measurements of maximum lift characteristics indicate that nose-opening sections of the type herein considered may not produce any marked effects on the maximum lift coefficient.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-WR-L-694
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  • 100
    Publication Date: 2019-06-28
    Description: No abstract available
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-WR-L-577 , AD-A801579
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