Study of nutrient and weed management on post harvest nutrient availability of maize and their residual effect on succeeding groundnut

A field experiment carried out during two consecutive Kharif and Rabi seasons of 2019-20 and 2020-21 on sandy loam soils of dryland farm at S.V. Agricultural College, Tirupati, Andhra Pradesh. Results indicated that higher soil available nutrient status (available nitrogen, available phosphorus and available potassium) at harvest of maize was recorded with green seeker directed N application (N3), which was however on par with soil test based fertilizer application (N4) and recommended dose of fertilizer application (N2). Significantly lower soil available nutrient status was resulted with control (N1). With regard to weed management practices, higher and lower soil available nutrient status was recorded with brown manuring (W9) and unweeded check (W1) respectively among the weed management practices during both the years of study and in pooled mean. Both nitrogen and weed management practices executed in preceding maize did not exert any significant influence on performance of soil available nutrient status after groundnut during both the years of experimentation.