GPS and GIS based soil fertility maps of KVK farm, Nayagarh located in the North-Eastern Ghat Agro-Climatic zone of Odisha, India

Surface soil samples were collected from upland (10 number of samples), medium land (10 number of samples) and low land (10 number of samples) of KVK, Nayagarh Farm. In upland, medium land and low land surface soils average sand percentage were found to be 84.4, 81.5 and 76.94; while average silt percentage was 4.65, 5.58 and 6.04 respectively and average clay percentage was found to be 10.68, 12.38 and 17.02 respectively; average pH value were found to be 4.59, 5.55 and 5.62 respectively; While average soil OC values were found to be 4.07, 5.22 and 5.66 g/kg respectively. Average soil available N of upland, medium land and low land were found to be 135.5, 167.2 and 200.7 kg/ha respectively. Average soil available P of upland, medium land and low land were found to be 10.2, 10.4 and 15.3 kg/ha respectively. Average soil available K of upland, medium land and low land were found to be 195.6, 260.4 and 311.5 kg/ha respectively. Soil available S of upland, medium land and low land were found to vary between 2.56 to 4.86, 3.22 to 5.26 and 4.10 to 6.02 mg/kg with a mean value of 3.46, 4.21 and 5.29 mg/kg respectively. Soil available boron of upland, medium land and low land were found to vary between 0.45 to 0.75, 0.55 to 0.90 and 0.61 to 0.95 mg/kg with a mean value of 0.58, 0.73 and 0.75 mg/kg respectively. Results shows that a gradual increase in available N, P, K, S and B was found from upland to towards low land surface soil which could be attributed to increase in organic matter and clay content in the low land.