Thematic maps based fertility status of panchayat villages of Ramanathapuram District in Tamil Nadu

Abstract

Thematic maps were prepared for S and micronutrients viz., Zn, Fe, Mn, Cu and B by considering the panchayat village fertility status, fertility rating based on nutrient index values and spatial variability maps prepared based on soil analytical data. Locations of soil samples which was marked on base maps at 1: 50,000 scales prepared from State Revenue Maps and digitized using Arc-info GIS. The total area estimated for the Ramanathapuram district was 411238.2 ha comprising 11 blocks. Considering the critical limits of soil micronutrients, all soil associations were not adequately supplied with DTPA extractable micronutrients at panchayat village level. Thematic maps were generated to show the extent of micronutrients deficiency or sufficiency based on micronutrient status at panchyat village level. The present study revealed that there is wide variation in soil fertility status of soils developed on various land forms in Ramanathapuram district.