Vol. 11, Special Issue 10 (2022)

Author(s):
Balaji Naik D and Gurumurthy KT

Abstract:
The study was conducted to assess the soil fertility status and to prepare the fertility mapping at Rajagondanahalli micro-watershed (480.55 ha) of Davangere district by using GIS and GPS techniques during the year of 2019 to 2021. Total 44 surface soil samples at 320 × 320 m grid intervals (0 to 15 cm depths) were collected and soil fertility mapping were developed by using Arc GIS software. The fertility status of soils of Rajagondanahalli micro-watershed indicated that the soil were low (81.15%) to medium (9.58%) in available nitrogen, low (4.77%) to medium (85.95%) in available phosphorus, medium (52.10%) to high (38.63%) in available potassium, available sulphur were found to be sufficient, whereas exchangeable calcium and magnesium were found to be sufficient. DTPA extractable zinc was sufficient in 434 ha (90.24%) and deficient in 2 ha (0.49%) area. Whereas DTPA extractable iron, manganese, copper were sufficient. Available boron was low (20.19%) to medium (70.53%) in the study area.