SPATIAL VARIABILITY OF THE SATURATED HYDRAULIC CONDUCTIVITY OF SOIL IN COCOA FARMING IN RECONCAVO BAIANO

Irrigated cocoa cultivation opened the way for production in Coastal Tablelands soils. However, in this region, the cohesive layer formed near the surface can be a limiting factor for production. The knowledge of physical soil water attributes enables the efficient irrigation management of cohesive soils. This study characterized and modeled the spatial variability of saturated hydraulic conductivity (K-0) in a Distrocoeso Oxisoil of the Reconcavo Baiano Coastal Tablelands. The soil sampling was performed as undeformed structures from 50 spaced points in an 8.0 to 8.0 m area, at three different depths in the experimental area of the Federal University of Bahia Reconcavo in the Cruz das Almas-BA cultivated with cocoa ('CCN 51'). In the laboratory, K o was determined by permeameter method constant load, and the pore size distribution was determined using the voltage table and the soil density (Ds). Data were analyzed using descriptive statistics and geostatistics. On average, the K-0 values were 40.41, 26.49, and 37.82 mm(-1) h(-1) at the depths from 0.0-0.15 m, 0.15-0.30, and 0.30-0.45 m. The Gaussian model was the best fit to the K-0 data set. For soil class, the K-0 showed a strong spatial dependence due to their relationship with the physical properties of the soil, its use, and handling Since an important attribute for the delimitation of homogeneous areas for specific site management purposes as well be considered.