The objective of this work was
to analyze factors that would affect P availability for winter crops in soils
under no tillage (SD) of the southwestern portion of Buenos Aires province
–Argentina–. Extractable P, microbial activity and acid phosphatase activity
presented a great stratification in all evaluated sites and years, which could
affect P availability. Also, in 10-20 cm there were limitations in aeration
porosity, which could affect the crop accessibility to soil P. These factors
would explain the high response to phosphoric fertilization in soils under SD
where P values were above sufficiency levels.
Extractable P; Stratification; Fertilization.
López
F.M., M.E. Duval, J.M. Martínez, J.A. Galantini. 2019. Condicionantes de la
disponibilidad de fósforo en suelos bajo siembra directa del sudoeste
bonaerense. Ciencia del Suelo 37 (1) 158-163.
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