Rev. Bras. Ciênc. Solo.2009;33(2):283-93.
Soybean yield variabillity regarding physical properties of a typic acrustox under no-tillage
01/Apr/2009
DOI: 10.1590/S0100-06832009000200006
Nowadays no-tillage soybean is widely used in crop-livestock farming systems in Brazil. The yield of no-tillage soybean was analysed in the county of Selvíria (latitudes from 20 ° 18 ‘ 05 ” S and 20 ° 18 ‘ 28 ” S and the longitudes de 52 ° 39 ‘ 02 ” W and 52 ° 40 ‘ 28 ” W (Mato Grosso do Sul State – Brazil), in the 2006/07 growing season, as affected by some physical properties of a local Typic Acrustox. The objective was to determine the soil property that could best explain the variability in the agricultural productivity. For this purpose, a geostatistical grid with 120 sampling points was installed to collect soil and plant data in an area of 4,068 m2, on a homogeneous slope of 0.025 m m-1. From the linear and spatial point of view, the high soybean grain yield could be explained by bulk density and volumetric moisture. The low variability of most soil properties indicated no-tillage as a system that induces homogenization of the soil physical environment.
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