Practices that improve crop N uptake can reduce N losses to the environment, thereby increasing fertilizer N use efficiency (NUE). The objective of the study was to evaluate different nutrient management approaches for enhanced nutrient use efficiencies by crop driven nutrient management by preventing the possible N losses. Due to excessive use of fertilizers in imbalanced ratios causing the low nutrient use efficiency and associated environmental problems which has further raised the serious concerns about the existing nutrient management practices. Increasing N2O concentrations in the atmosphere have been linked to anthropogenic activities. Site specific nutrient management is a potent climate smart nutrient management (CSNM) technology which is able to establish synergy with crop–soil nutrient dynamics and is also able to reduce the possible threat to the environment in form of N2O emission. Treatments comprised of six location/site specific nutrient management approaches along with 4 nutrient omission treatments. The investigation results indicated that the treatment Nutrient Expert recommended fertilizer under SSNM (NE-SSNM) is able to mitigate crop driven N demand at the critical stages of crops and also superior in terms of grain yield and profitability. More grain yield with less fertilizer were obtained by using SSNM (Nutrient Expert recommended fertilizer) techniques in comparison to the blanket N application and other nutrient approaches, which is economically viable and environment friendly.

Keywords: Nutrient Decision Support Systems (NDSS), Nutrient Use Efficiency (NUE), Site Specific Nutrient Management (SSNM)