Effect of residue and nitrogen management in maize (Zea mays) on mustard (Brassica juncea) productivity and profitability under conservation agriculture

A field experiment was conducted during 2018–19 and 2019–20 to assess the influence of precision nitrogen management options in preceding maize (Zea mays L.) on succeeding mustard (Brassica juncea under conservation agriculture sandy loam soil Delhi. The had two main plots with residue (WR) without (WoR) retention four sub-plot treatments N applied {recommended dose (RDN), 33, 50 70% basal RDN +green seeker (GS) based application} uniform recommended 90 kg N/ha for all treatments. positive response residual plus directly application observed growth, dry matter accumulation, yield attributes, nutrient uptake mustard. On a pooled mean basis, crop mulching enhanced 7.1 8.3% seed stalk 9.4 5.2%higher net returns B:C ratio. 50% + GS guided treatment basis gave 5.9 5.2% higher 7.7 7.9% ratio compared conventional RDN. highest land productivity also obtained (`654/day) +GS (`674/day). Overall, study concluded that zero tillage rotation RDN+GS improves mustard, could be implemented maize-mustard cropping system resource-poor semi-arid conditions