Vol. 11, Special Issue 12 (2022)

Author(s):
Ragini S Patil and PL Patil

Abstract:
Soil samples from Kanginhal sub-watershed in Northern dry zone of Karnataka were drawn at 500 m grid interval and assessed for their fertility parameters. Analytical data was interpreted and statistical parameters like range, mean standard deviation and coefficient of variation were calculated for each parameter. Soil fertility maps were prepared for each parameter under GIS environment using Arc GIS v 10.4. Soils were moderately alkaline to very strongly alkaline with non saline to moderate salinity. Soil organic carbon content was low to medium and available nitrogen was low. Available phosphorus and sulphur were medium to high, whereas available potassium was high in these soils. Among the micronutrients copper and manganese were sufficient while, zinc and iron were deficient.The mapping of nutrients by GIS technique in the sub-watershed revealed that OC, available N, Zn and Fe are important soil fertility constraints indicating their immediate attention for sustained crop production.