Vol. 12, Issue 2 (2023)

A study was conducted to evaluate the effects of management practices on yield, nutrient uptake and concentrations of finger millet crop grown in Appanahalli sub-watershed of Gubbi taluk, Karnataka. A total of six micro watersheds under Appnahalli sub watershed with three major landforms viz., undulating upland or Ridge, Midland and Valley under Ragi cropping system were selected. A total of 90 plant samples were collected in a crop cutting experiment during the year 2020. Results of study indicated that Grain and straw yield of finger millet grown in Appnahalli sub-watershed varied from 15.83 to 31.12 q ha^-1 and 19.07 to 35.61 q ha^-1, respectively. Higher grain and straw yield were observed in valley landform compared to midland and ridge landform. In Appanahalli sub-watershed, N, P and K concentration in finger millet grain varied from 1.11 to 1.42%, 0.10 to 0.28% and 0.33 to 1.12%, respectively, whereas, N, P, K concentration in straw varied from 0.11 to 0.88%, 0.03 to 0.19% and 0.51 to 1.48%, respectively. The uptake of N, P, K by finger millet grain and straw in Appanahalli sub-watershed ranged from 12.34 to 30.63 kg ha^-1 and 7.39 to 20.54 kg ha^-1, 1.21 to 6.56 kg ha^-1 and 1.04 to 4.99 kg ha^-1, and 8.63 to 31.12 kg ha^-1 and 11.32 to 45.83 kg ha^-1, respectively. Significantly higher concentration of iron (79.27 and 41.16 mg kg^-1) followed by manganese (44.79 and 40.55 mg kg^-1), copper (9.91 and 9.50 mg kg^-1) and zinc (9.19 and 8.24 mg kg^-1) in grain and straw of finger millet, respectively was recorded in Appanahalli sub-watershed. An uptake of iron (187.02 and 137.02 g ha^-1), manganese (120.65 and 145.46 g ha^-1), copper (18.92 and 21.36 g ha^-1) and zinc (20.42 and 24.26 g ha^-1) by grain and straw of finger millet were recorded, respectively. A comparatively higher uptake of all the micro-nutrients were found in valley landform than midland and ridge landform due to higher organic matter and nutrient accumulation. Hence, proper and adequate management practices need to be adopted for bringing the soils to favourable soil reactions to a better fertility and productivity conditions.