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  • Articles  (59)
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  • Springer  (59)
  • 1980-1984  (49)
  • 1965-1969  (10)
  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (47)
  • Computer Science  (12)
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  • Articles  (59)
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  • 1
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    Effect of pH on molecular weight and size of fulvic acids in drainage water from peaty grassland in NW Netherlands (1983)
    Springer
    Details
    Publication Date: 1983-02-01
    Print ISSN: 0032-079X
    Electronic ISSN: 1573-5036
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Springer
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Long-term effect of N and P fertilization on a pearlmillet—wheat cropping system (1982)
    Springer
    Nutrient cycling in agroecosystems 3 (1982), S. 127-139 
    Details
    ISSN: 1573-0867
    Keywords: cropping system ; optimum fertilizer use ; residual fertility ; sequential cropping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Results of an eight-year study on long-term effect of N and P application in a pearlmillet—wheat sequence is reported. There was little or no residual effect of N on any of the crops. Pearlmillet needed 70 to 80 kg N and wheat required more than 120 kg N ha−1 every year for optimum grain yield. There was no soluble P build up in soil by continuous P application. Fertilizing wheat every year with 19 kg P and pearlmillet with 13 kg P ha−1 is considered optimum. Continuous cropping leading to a production of 216 tonnes of biomass ha−1 in 17 crops and use of high analysis N (urea) and P (triple superphosphate) fertilizers had not impaired the K and Zn supplying capacity of these alluvial soils containing illite clay minerals. The experiment is being continued to monitor the productivity of the soil as affected by continuous cropping.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01082973
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  • 3
    Electronic Resource
    Electronic Resource
    Modification of irrigation requirement of wheat through mulching and foliar application of transpiration suppressants (1983)
    Springer
    Irrigation science 4 (1983), S. 215-223 
    Details
    ISSN: 1432-1319
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Field experiments on wheat for 2 years showed a beneficial effect of organic mulch (rice straw), reflective transpiration suppressant (kaolin) or metabolic antitranspirant (alachlor) by decreasing the evapotranspiration (ET) losses of soil water, increasing grain yield and thus water use efficiency. Increase in grain yield was due to an increased tiller survival, longer spikes and more spikelet fertility. The number of shrivelled kernels per spike was reduced by ET control measures. A combination of mulching and transpiration suppression brought about a saving of 1 irrigation on a clay-loam soil and at least 2 irrigations on a loamy-sand soil. Without the ET control measures 4 irrigations were needed on a clay-loam soil and 6 on a loamy-sand soil for maximum productivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00285527
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  • 4
    Electronic Resource
    Electronic Resource
    Effects of introduced and indigenous VA mycorrhizal fungi on nodulation, growth and nutrition ofMedicago sativa in phosphate-fixing soils as affected by P fertilizers (1980)
    Springer
    Plant and soil 54 (1980), S. 283-296 
    Details
    ISSN: 1573-5036
    Keywords: Endomycorrhiza ; Glomus mosseae ; Legume nodulation ; Medicago sativa ; Microbial fertilizers ; Phosphate-fixing soils ; Rhizobium meliloti
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The legumeMedicago sativa was grown in two phosphate-fixing soils which received soluble or rock phosphate. The effects of the inoculation withGlomus mosseae on plant nutrition and nodulation were studied. The introduced VA fungi became successfully established and improved the degree of infection over level achieved by native endophytes. In all experimental conditions tested, plant dry weight, the total uptake of N and P and nodulation byRhizobium meliloti were increased by mycorrhizal inoculation. The size of the increase was inversely correlated with soluble P content in the soil. Mycorrhization, enhanced by introduction of suitable VA fungi, had similar effects to that of the dose of soluble phosphate tested. Indigenous and native endophytes cooperated in these effects. Results are discussed in terms of reducing the input of soluble P fertilizer to phosphate-fixing soils and the possibility of restoring the phosphate stock using a more rational supply of soluble P, that allows cooperation with VA fungi, or by the use of less soluble and expensive forms of P fertilizers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181854
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of gibberellins and the growth retardant CCC on the nodulation of soya (1984)
    Springer
    Plant and soil 77 (1984), S. 53-60 
    Details
    ISSN: 1573-5036
    Keywords: β-chloroethyltrimethylammonium chloride ; Gibberellins ; Nodulation ; Rhizobium japonicum ; Soya
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The effect of exogenous applications of gibberellins (GAs) or the growth retardant β-chloroethyltrimethylammonium chloride (CCC) on root nodule formation and activity (C2H2-reduction) in soya was studied. Daily foliar application of GA3 (2.89×10−6 M) delayed the formation of nodule initials and reduced the numbers mass nodule−1 and specific activity of nodules by 43%, 31% and 47% respectively, without affecting plant growth. Similar effects on nodulation were produced by foliar application of GA4 (3.01×10−5 M) or GA7 (3.03×10−5 M), or by the addition of GA3 (2.89×10−6 M) to the rooting medium. GA effectiveness in reducing nodule numbers was decreased by delaying its application until after the initial infection process had occurred, but the nodules formed were smaller and less active than those of the untreated control plants. The GA effect on nodulation and nodule activity was not associated with alterations in root exudate or due to a direct inhibitory effect of the hormone on the nitrogenase system. When the endogenous root content of GA-like substances was reduced (86% decrease) by foliar application of CCC (6.30×10−5 M), nodule numbers were increased by 56%, but nodule size and total nodule activity were similar to those of control plants. The GA and CCC treatments had no effect on rhizobial growth in liquid culture nor on root colonisation by rhizobia. The results suggest that the endogenous content of root GA may have a regulatory role in both the infection process and in subsequent nodule morphogenesis, thus controlling both the number and effectiveness of the root nodules formed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02182811
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of ammonium salts on the intake of phosphate by Indian clay minerals (1968)
    Springer
    Plant and soil 29 (1968), S. 335-337 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Phosphate fixation by kaolinite, muscovite, phlogopite, biotite and vermiculite from aqueous systems in presence of different quantities of ammonium sulphate, ammonium nitrate and ammonium chloride, have been studied. It is observed that the ammonium salts induce graeter phosphate fixation in presence of kaolinite and partly in presence of phlogopite, biotite and vermiculite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01348954
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  • 7
    Electronic Resource
    Electronic Resource
    Endosperm peroxidase electrophoresis patterns to distinguish tetraploid from hexaploid wheats (1981)
    Springer
    Euphytica 30 (1981), S. 389-392 
    Details
    ISSN: 1573-5060
    Keywords: Triticum aestivum ; bread wheat ; Triticum turgidum ; durum wheat ; endosperm peroxidases
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A simple method is proposed to distinguish hexaploid (Triticum aestivum L.) from tetraploid (Triticum turgidum L., durum wheat) cultivated wheats on the basis of peroxidase isozymes coded by genome D. It can also be used as a first step to detect possible contamination by tetraploid genotype mixtures. The peroxidase patterns of endosperm and of embryo plus scutellum found among 349 entries of a durum wheat world basis collection are shown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00034001
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  • 8
    Electronic Resource
    Electronic Resource
    The effect of N2O on pollen tube mitosis in styles and its potential significance for inducing haploidy in potato (1967)
    Springer
    Euphytica 16 (1967), S. 190-198 
    Details
    ISSN: 1573-5060
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract 1. Pollen tubes with a single restitution sperm nucleus can be induced in Datura stramonium and Solanum phureja, when after pollination, plants are submitted to laughing gas (N2O) under pressure. 2. The cytological details of the N2O effect on pollen tube mitosis are described and its implications for the production of haploids are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00043454
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  • 9
    Electronic Resource
    Electronic Resource
    Effect of osmotically induced leaf moisture stress on nodulation and nitrogenase activity ofGlycine max (1984)
    Springer
    Plant and soil 80 (1984), S. 267-283 
    Details
    ISSN: 1573-5036
    Keywords: Abscisic acid ; Gibberellin ; Polyethylene glycol ; Rhizobium ; Roots ; Nitrogenase ; Nodulation ; Soya ; Water stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The effect of 2-day cycles of osmotically induced leaf moisture stress followed by partial recovery on the nodulation and nitrogenase activity of 2 soya cultivars was studied. Fourteen days after plant inoculation (mid-growth stage) the total leaf electrochemical water potential (ψwleaf) of control plants ranged from −0.8 to −1.9 bars, whereas the concentrations of osmoticum (polyethylene glycol 4000) induced ψwleaf values ranging from −1.4 (recovery value) to −3.1 bars (low stress), −1.8 to −4.4 bars (mild stress), and −2.2 to −6.2 bars (medium stress). The low stress treatment reduced nodule numbers and their specific activity in both cultivars, without affecting nodule size or the time required for nodule initiation. Nodule initiation was delayed in both cultivars by the mild and medium stress treatments, the former treatment reducing the number and size of the nodules and such nodules exhibited very low specific activity. The medium stress treatment prevented the further development of nodule initials, which remained inactive throughout the experiment. Such results imply an effect of water stress on the infection process and on nodule morphogenesis. The reduction in nodule numbers observed in water stressed plants was not associated with a reduced number of rhizobia in the rhizoplane nor due to an effect on root growth or root hair formation. At a stage prior to the formation of macroscopic nodule initials, the roots of plants under medium stress (ψwleaf=−5.5 bar)s) had a higher content of abscisic acid (ABA) (4-fold increase) and a lower content of gibberellin (GA)-like substances (21.4% reduction) as compared to control plants (ψwleaf=−1.0 bar). Although the medium stress treatment slightly increased the stomatal resistance of leaves, photosynthetic and transpiration rates were unaffected. Similar alterations of the hormononal balance occurred in the nodulated roots of plants subjected to naturally induced leaf moisture stress. Since the foliar application of ABA (1.92×10−5 M) to unstressed plants inhibited nodulation (45% reduction in nodule numbers), the increased endogenous content of thishormone in the roots of plants under leaf moisture stress may provide some physiological insight into the inhibitory effect of water stress on the nodulation process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02161183
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  • 10
    Electronic Resource
    Electronic Resource
    Foliar absorption — penetration of the cuticular membrane and nutrient uptake by isolated leaf cells (1967)
    Springer
    Plant foods for human nutrition 14 (1967), S. 105-120 
    Details
    ISSN: 1573-9104
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Zusammenfassung Blattabsorption erfolgt durch Eindringen in Kutikularschichten der Membran und durch Aufnahme durch die lebenden Zellen innerhalb des Blattes. Eine detaillierte Analyse der Nährstoffabsorption nach diesen beiden Systemen zeigte, daß die Ionen-Aufnahme über die Kutikularmembran durch Diffusion und daß die Koppelung des aktiven Transports mit dem Stoffwechsel im Zellbereich erfolgt. Harnstoff dringt durch die Kutikularmembran ein und wird viel schneller als Nährstoff-Ionen durch die Blattzellen absorbiert. Weiterhin erleichtert Harnstoff das Eindringen und die Absorption anderer, gleichzeitig applizierter Substanzen. Die Fixierung der Eindringungsstelle von Nährstoff-Ionen in Kutikularmembrane wurde durch Mikroautoradiographie ermittelt. Das Eindringen erfolgt um die Stomata-Öffnungen und entlang der periklinalen Zellwände. Metallgelate von Eisen, Mangan und Zink mindern die Zellabsorption, vermehren aber die Translokation der absorbierten Nährstoffe. Im Bereich der Zellen werden Nährstoff-Ionen absorbiert, aber Verbindungen ausgeschlossen.
    Abstract: Résumé L'absorption foliaire consiste en une pénétration à travers la membrane cuticulaire, et l'assimilation par les cellules vivantes à l'intérieur de la feuille. Une analyse détaillée de l'absorption des éléments nutritifs par ces deux systèmes a révélé que la pénétration des ions à travers la membrane cuticulaire se fait par diffusion, et que le couplage entre le transport actif et le métabolisme se fait au niveau cellulaire. L'urée pénètre à travers la membrane cuticulaire et est absorbée par les cellules de la feuille beaucoup plus rapidement que ne le sont les ions nutritifs. D'autre part l'urée facilite la pénétration et l'absorption d'autres substances appliquées simultanément. La pénétration des ions nutritifs à travers la membrane cuticulaire a été localisée par microautoradiographie comme se faisant autour des pores stomatiques, et le long des parois des cellules périclinales. La chélation de métaux tels que fer, manganèse, zinc, réduit la vitesse d'absorption foliaire mais augmente la vitesse de transport de l'ion nutritif absorbé. Au niveau de la cellule, l'ion nutritif est absorbé, et le complexant est exclu.
    Notes: Summary Foliar absorption consists of penetration of a cuticular membrane and uptake by living cells within the leaf. A detailed analysis of nutrient absorption by these two systems has revealed that ionic penetration of the cuticular membrane is by diffusion, and that the coupling between active transport and metabolism is at the cellular level. Urea penetrates the cuticular membrane and is absorbed by leaf cells much more rapidly than are nutrient ions. Furthermore, urea facilitates penetration and absorption of other materials simultaneously applied. Penetration of nutrient ions through cuticular membranes has been localized by microautoradiography as occurring around stomatal pores and along periclinal cell walls. Chelation of metals such as iron, manganese and zinc reduces the rate of foliar absorption, but increases the translocation of the absorbed nutrient. At the cellular level the nutrient ion is absorbed and the ligand is excluded.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02411572
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