An experiment was conducted on nutrient management approaches using RDF, SSNM, STCR and nutrient expert under different rice ecosystem using slow release nitrogen sources viz., neem coated urea and urea supergranules. The initial and final soil N content was analyzed at active tillering, panicle initiation, milking stages and at harvest of direct seeded and transplanted rice. The three-way interaction (M x N x S) proved that a significantly higher value of available N content in soil was noticed in SSNM (6 t ha-1) treated plot with neem coated urea in transplanted rice (M2N3S2) at active tillering stage (245.96 kg ha-1) and at harvest (213.46 kg ha-1), respectively, while application of NCU through SSNM approach (7 t ha-1) in direct seeded rice (M1N4S2) obtained maximum available N content at panicle initiation stage (229.18 kg ha-1) and application of NCU through STCR approach for the yield target of 7 t ha-1 in direct seeded rice (M1N2S2) at milking stage (218.15 kg ha-1).
A study was conducted on nutrient management approaches in rice-blackgram cropping system under different ecosystems. The growth parameters were recorded at 30 DAS, 60 DAS and at harvest of blackgram crop. The results indicated that the plant height and number of branches had increased linearly as the crop attained maturity. The three way interaction of ecosystem, nutritional approaches and N sources (M x N x S) had proved that significantly taller plants of blackgram were associated with the residual effect of transplanted soils which possessed neem coated urea based on SSNM for yield target of 7 t ha-1 (M2N4S2) at all stages of crop growth and number of branches at 60 DAS and at harvest.
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