Soil fertility mapping in Ghataprabha left bank canal command area of north Karnataka by geographic information system technique
N.K. Binita, G.S. Dasog, P.L. Patil
Abstract
An investigation was conducted on soil fertility status of the portion of Ghataprabha Left Bank canal (GLBC) command area to evaluate the status of major nutrients as affected by the different physiographic units. Two hundred and forty two samples were collected at random in GLBC command area representing all physiographic positions in hte landscape and major crops grown. The fertility maps were prepared for the area using Arc View 3.1 and spatial analyst using spline function for interpolation. The nutrient status was discussed in relation with physiographic position and cropping pattern. Due to intensive irrigated agriculture practiced in the command area, the nutrient status did not follow any distinct trend with respect to physiographic units and crops grown. Based on hte overall assessment, the nutrient status in these soils was optimum.
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