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    Phosphorus and nitrogen fertilization of soybean in the Nigerian savanna

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    S11ArtKamaraPhosphorusInthomDev.pdf (128.9Kb)
    Date
    2011-08
    Author
    Kamara, A.Y.
    Ekeleme, F.
    Omoigui, L.O.
    Ajeigbe, Hakeem A.
    Type
    Journal Article
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    Abstract/Description
    Soybean (Glycine max) is a major cash crop in the savannas of Nigeria although productivity is typically constrained by poor soil fertility. The objective of this research was to determine the interactive effect of N and P on soybean productivity in the northern Guinea and Sudan savannas of northeast Nigeria. Experiments were conducted using locally adapted early and late maturing cultivars. Two rates of N and three rates of P fertilizer were also compared at both sites over two years. At both sites, pods plant−1 and seed yield were higher in 2006 than in 2007, possibly due to better rainfall distribution in 2006. Nitrogen fertilizer had no significant effect on seed yield or pods plant−1. Application of P fertilizer increased pods plant−1 by 40–66%. Averaged across site and year, seed yield with no P was 1057.2 kg ha−1 while yield with 20 and 40 kg ha−1 P were 1941.0 kg ha−1 and 2371.5 kg ha−1, respectively. No significant interaction effect between N and P fertilizer on seed yield and pods plant−1 was observed. The late maturing cultivar yielded less than the earlier maturity group cultivar in 2007 likely due to moisture stress. For optimum seed yield 40 kg of P fertilizer ha−1 is recommended for soybean production in both locations. Our results suggest that N fertilizer is not critical for soybean production in this area.
    https://dx.doi.org/10.1017/s0014479711000512
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/2191
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1017/s0014479711000512
    IITA Subjects
    Soybean
    Agrovoc Terms
    Soybeans; Grain Legumes; Cash Crops; Phosphorus Fertilizer; Nitrogen Fertilizer
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Journals
    Experimental Agriculture
    Collections
    • Journal and Journal Articles5078
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