Manure as Asource of Nitrogen Phosphorous In Soils

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Date
1988
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Kenya Soil Survey
Abstract
Nitrogen (N) and phosphorus (P) are present in manure as various inorganic and organic compounds. The distribution of Nand P between these compounds depends on the origin of the manure (the species, age and production level of the animal and the corresponding composition of their diets), on the housing, manure collection and manure storage systems and on any possible manure treatment. During storage of slurry the composition moves towards 40-70% of total N being present as ammonium-N (NHt-N) and, more slowly, towards 80-90% of total P being present as calcium phosphates.
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