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- W1930995005 abstract "Leguminous tree species are known to replenish soil nutrients through biological N fixation, mulch effect and recycling of other nutrients from the deeper soil layer to the topsoil, when managed in agroforestry systems. The soil available phosphorus (P) status and inorganic P-forms (fractionation) in a long-term gliricidia-maize trial was studied to understand the effect of additions of gliricidia prunings combined with and without inorganic fertilizers (N and P). Addition of gliricidia prunings and inorganic N and P fertilizers significantly increased phosphorus uptake by maize. Bray P1 had strong correlation with P uptake by maize in gliricidia/maize intercropping (r = 0.81, p<0.001). Both the Olsen and Bray P1 methods of extraction were strongly correlated (r = 0.80). Phosphorus fractionation data of the soils from the maize and gliricidia-maize plots indicated that the Fe-P fraction was the most dominant form of inorganic P. The addition of gliricidia prunings significantly reduced the Fe-P and Al-P forms. We conclude that iron phosphate acts as a sink for applied inorganic P in Lixisols and the increased soil organic matter through addition of gliricidia prunings solubilizes fixed P in the soil. Key words: Agroforestry, fertilizer trees, available P, P-uptake, inorganic P fractions." @default.
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- W1930995005 date "2007-10-31" @default.
- W1930995005 modified "2023-09-26" @default.
- W1930995005 title "Use of pruning and mineral fertilizer affects soil phosphorus availability and fractionation in a gliricidia/maize intercropping system" @default.
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- W1930995005 doi "https://doi.org/10.5897/ajar.9000752" @default.
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