Crop productivity mostly depends heavy nitrogen (N) fertilization. Nutrient use inefficiencies can cause environmental pollution through the release of greenhouse gases into the atmosphere and of soluble and particulate forms of N, P and carbon (C) in leachate and leaching into watercourses. Improving nutrient use efficiencies in agriculture calls for the development of sustainable nutrient management strategies, more efficient use of mineral fertilisers, increased recovery and recycling of waste nutrients, and, better exploitation of the substantial inorganic and organic reserves of nutrients in the soil. More energy is required to produce N fertilizer creates both higher environmental pollution and its production cost. Therefore, Nitrogen use efficiency (NUE) is more essential for agriculture development and environmental protection. NUE is a very complex process including assimilation, nitrification, translocation, nitrogen uptake and remobilization due to several environmental, genetic and management factors. Therefore, optimum nitrogen application to soil can improve the current status of soil, which increased the plant metabolism and its production. In future for breeding it is very important to increase grain yield and nitrogen utilization through modified cultivar.
