USO DE CAL HIDRATADA AGRÍCOLA EM SISTEMA DE SEMEADURA DIRETA DE SOJA NO NOROESTE PAULISTA.

There is little information on the use of agricultural hydrated lime in sustainable agricultural production systems, mainly in the cultivation of soybean in no-tillage. The present work was carried out with the objective of evaluating the effect of hydrated agricultural lime application on soybean cultivation in no-tillage in the Northwest region of São Paulo State, Brazil. The experimental design was a randomized block with four treatments (T1: standard treatment (without application of agricultural hydrated lime); T2 - application of hydrated agricultural lime in surface to establish that calcium occupies 70% of the CTC in the 0-0.20 m layer, T3 - application of hydrated agricultural lime in surface to establish that calcium occupies 52.5% of the CTC in the 0-0.20 m layer, T4 - application of agricultural hydrated lime in surface to establish that calcium occupies 35% of CTC in the 0-0.20 m layer) and four replicates. The parameters evaluated in the soybean crop were: height of insertion of the first pod, height of plants, final stand ha-1, mass of one hundred grains and grain productivity ha-1. The data were submitted to the F test and the means were compared by the Tukey test (p <0.05). It was verified that the treatment T2 presented higher height of insertion of the first pod than the standard treatment. For the other evaluated agronomic characteristics, there was no difference between treatments. [ABSTRACT FROM AUTHOR]