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Effects of Tillage and Crop Residue Application on Soybean Nitrogen Fixation in a Tropical Ferralsol

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Author Info

  • Job Kihara

    ()
    (Tropical Soil Biology and Fertility (TSBF) Institute of CIAT, Box 30677, Nairobi 00100, Kenya
    Zentrum für Entwicklungsforschung (ZEF), Walter-Flex Str. 3, Bonn 53113, Germany)

  • Christopher Martius

    ()
    (Zentrum für Entwicklungsforschung (ZEF), Walter-Flex Str. 3, Bonn 53113, Germany)

  • Andre Bationo

    ()
    (Alliance for Green Revolution in Africa (AGRA-Alliance), CSIR Office Complex, #6 Agostino Neto Road, Airport Residential Area, PMP KIA 114, Airport-Accra, Ghana)

  • Paul L. G. Vlek

    ()
    (Zentrum für Entwicklungsforschung (ZEF), Walter-Flex Str. 3, Bonn 53113, Germany)

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    Abstract

    This study was aimed at quantifying soybean ( Glycine max ) nitrogen fixation under reduced tillage (RT) and conventional tillage (CT) in a tropical Ferralsol of the sub-humid zone of western Kenya, using the isotope 15 N dilution method. Crop residue (CR) management was a superimposed treatment in soybean-maize rotation and intercropping systems. This study quantified N in abscised soybean leaves. Soybean-N derived from the atmosphere (%NDfA) ranged between 41–65%; it was higher ( P

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    Bibliographic Info

    Article provided by MDPI, Open Access Journal in its journal Agriculture.

    Volume (Year): 1 (2011)
    Issue (Month): 1 (December)
    Pages: 22-37

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    Handle: RePEc:gam:jagris:v:1:y:2011:i:1:p:22-37:d:15298

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    Related research

    Keywords: intercropping; litter fall; N balance; %NDFA; 15 N dilution;

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