Vol. 10, Issue 11 (2021)

Author(s):
G Narayana Swamy, AV Nagavani, Y Reddi Ramu, Malleswari Sadhineni, B Sahadeva Reddy, K Bhargavi and M Vijaya Sankar Babu

Abstract:
The experiment was conducted during two consecutive kharif seasons of 2014 and 2015. During both the years, supply of 100 per cent of nitrogen through sheep penning (T₉) recorded significantly higher pod and haulm yield of groundnut, which was comparable with 50 per cent nitrogen through urea + 50 per cent nitrogen through farm yard manure (T₃) and recommended dose of fertilizer (T₂) under rainfed situation. Under protective irrigation, additionally comparable with application of 50 per cent nitrogen through urea + 50 per cent nitrogen through leaf compost (T₅). Control (T₁) recorded the lower pod and haulm yield of groundnut at both the situations during the two consecutive years of investigation. At all the stages of the crop growth the higher nitrogen and phosphorus uptake of groundnut was registered with100 per cent nitrogen through sheep penning (T₉), which was in parity with recommended dose of fertilizers (T₂) at both the situations during the two consecutive years of investigation. Higher potassium uptake in groundnut was recorded with application of 100 per cent nitrogen through sheep penning (T₉) while lower N, P and K was associated with control (T₁). Significantly higher post-harvest soil available nitrogen status was recorded with 100 per cent nitrogen through organic sources viz., FYM, sheep penning, leaf compost, sheep manure and enriched groundnut shells (T₄, T₉, T₆, T₈ and T₁₀) over other nutrient management practices tried during 2014 and 2015 under rainfed and protective irrigated situations. The post-harvest soil available phosphorus recorded with 100 per cent nitrogen through sheep penning, leaf compost, enriched groundnut shells and sheep manure (T₉ T₆ T₁₀ and T₈) was comparable among themselves and significantly superior over other treatments. Application of 100 per cent nitrogen through sheep penning (T₉) recorded maximum post-harvest soil available potassium, which was in parity with application of 100 per cent nitrogen either through sheep manure (T₈) or enriched groundnut shells (T₁₀). Whereas, the minimum values of post-harvest soil available nitrogen, phosphorus and potassium were registered with control (T₁).