Spatial variability of physico-chemical parameters of soil and biophysical surface of sorghum crop

The knowledge of spatial variability of soil and crop properties is useful for agricultural management decision making. The objective of this research was to evaluate the spatial variability of soil chemical and physical parameters and biophysical surface parameters of sorghum crop. The study was conducted in an area of 12 ha of a Typic Paleudult. Georrefered soil sampling and electrical conductivity (EC) of soil were conducted before sowing of sorghum. Landsat 5 imageries were used to establish the biophysical surface parameters. Geostatistics tool were used to determine and model the spatial variability of the attributes under study. Sampling density adopted was insufficient for an adequate characterization of the spatial variability of soil parameters. There was spatial dependence from moderate to strong degree for EC biophysical parameters with ranges varying from 74.4 to 181.1 m. Remote sensing was useful to show spatial variability of sorghum crop and has a great potential for the application of precision agriculture.