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Phosphorus availability for soybean cropped over brachiaria straw

Grant number: 06/04535-2
Support type:Regular Research Grants
Duration: December 01, 2006 - November 30, 2008
Field of knowledge:Agronomical Sciences - Agronomy
Principal researcher:Ciro Antonio Rosolem
Grantee:Ciro Antonio Rosolem
Home Institution: Faculdade de Ciências Agronômicas (FCA). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil

Abstract

Brazilian soils are deficient in phosphorus, an essential element for plant growth. So it is limiting for crop yields in tropical soils. Conservation systems as no-till modifies P dinamics in soil, increasing its concentration mainly in the superficial soil layers. the inclusion of some plant species in the system can promote P availability and improve its distribution within the soil profile. In this experiment the contribution of brachiaria in making P more available for soybeans as weel as its effect on P forms in the soil. The experiment will be conducted in Botucatu, using rates of Suluble and Natural phosphates applied broadcast or in furrow, with and without cropping to brachiaria. (AU)

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