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  • EARTH RESOURCES AND REMOTE SENSING  (5)
  • 31P nuclear magnetic resonance (NMR)  (1)
Collection
Keywords
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  • 1
    Electronic Resource
    Electronic Resource
    Influence of conifers on the forms of phosphorus in selected New Zealand grassland soils (1996)
    Springer
    Biology and fertility of soils 21 (1996), S. 37-42 
    Details
    ISSN: 1432-0789
    Keywords: 31P nuclear magnetic resonance (NMR) ; Soil phosphorus fractions ; Mineralization ; Tussock grassland ; Conifers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract We examined the effects of conifers on the forms of P in low-fertility tussock grassland soils using 31P nuclear magnetic resonance (NMR) and soil P fractionation. Results from field and glasshouse experiments clearly demonstrated that conifers enhanced the mineralization of labile (and to a lesser extent more resistant) forms of soil organic P which, in turn, increased amounts of labile inorganic P in the soil. These findings have important implications for P availability and long-term sustainable management of grassland soils in New Zealand.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335991
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Unknown
    The use of Skylab data to study the early detection of insect infestations and density and distribution of host plants (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The detection of insect infestations and the density and distribution of host plants were studied using Skylab data, aerial photography and ground truth simultaneously. Additional ground truth and aerial photography were acquired between Skylab passes. Three test areas were selected: area 1, of high density citrus, was located northwest of Mission, Texas; area 2, 20 miles north of Weslaco, Texas, irrigated pastures and brush-covered land; area 3 covered the entire Lower Rio Grande Valley and adjacent areas of Mexico. A color composite picture of S-190A data showed patterns of vegetation on both sides of the Rio Grande River clearly delineating the possible avenues of entry of pest insects from Mexico into the United States or from the United States into Mexico. Vegetation that could be identified with conventional color and color IR film included: citrus, brush, sugarcane, alfalfa, irrigated and unimproved pastures.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: A-15 , NASA. Lyndon B. Johnson Space Center. NASA Earth Resources Survey Symp. Vol. 1-A: Agr. Environment; p 203-219
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    A study of the early detection of insect infestations and density/distribution of host plants (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The author has identified the following significant results. With comparative observations of film types and seasonal influences on reflectance characteristics, many crop varieties can be identified. This study shows that citrus, sugar cane, brush, some winter vegetables, and grain crops could be identified. Vegetative patterns in border areas can be detected. This information can be useful in detecting avenues of entry of pest species and areas of stress that require vigilance in stopping the spread of destructive species. Influence of some environmental factors on crops that may be confused with pest injury, or related factors, can be detected and identified with Skylab data (S-190B).
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E76-10079 , NASA-CR-144483
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Unknown
    A study of the early detection of insect infestations and density/distribution of host plants (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: There are no author-identified significant results in this report.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E75-10116 , NASA-CR-141951 , PR-18
    Format: application/pdf
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  • 5
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    A study of the early detection of insect infestations and density/distribution of host plants (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: There are no author-identified significant results in this report.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E75-10115 , NASA-CR-141950 , PR-19
    Format: application/pdf
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  • 6
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    Unknown
    A study of the early detection of insect infestations and density/distribution of host plants (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The author has identified the following significant results. Significant results have been obtained in the identification of citrus, sugarcane, winter vegetables, irrigated pastures, and unimproved pastures which contain brush. Land without vegetation, lakes, roads, and waterways can also be determined. Different densities of vegetation covering some cultivated areas are apparent. The practical applications of these results are many. The abundance of host plants of pests can be determined. Avenues of entry of pests can be plotted, facilitating control or preventing entry of pest species. The boundaries of areas to be quarantined can be accurately established after viewing the S-190B data. Better cultural methods can be employed such as planning where to plant certain crops that indirectly are detrimental to those already growing. This would relate to such factors as pesticide drift or alternate hosts of major pests.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E75-10062 , NASA-CR-141002 , PR-17
    Format: application/pdf
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