Fertility assessment of soils of Nandipura micro-watershed under Chikkamagalur district, Karnataka

Abstract

An assessment on fertility status was carried out on the soils of Nandipura micro-watershed during the year 2018-2019. Forty-eight grid samples were collected and analysed for its fertility status and were mapped using ArcGIS software. The mapping of fertility status of soils of Nandipura micro-watershed revealed that the soils were low (86.52% of the micro-watershed area) to medium (8.57%) in available nitrogen content, low (44.02%) to medium (51.07%) in available phosphorus, low (15.20%) to medium (79.89%) in available potassium, medium (21.56%) to high (73.52%) in available sulphur, exchangeable calcium and magnesium content were sufficient in entire micro-watershed area. DTPA extractable zinc was deficient in 105 ha and sufficient in 370 ha area whereas, DTPA extractable iron, copper and manganese were sufficient throughout the study area. Available boron was low (34.38%) to medium (60.25%).