1. Diffuse agricultural water pollution in India;Agarwal;Water Science and Technology,1999
2. Fate of fertilizer nitrogen in a multiple cropping system;Arora,1980
3. Nitrate pollution of ground water under different systems of land management in Punjab;Bajwa,1993
4. Efficiency of nitrogen use by dryland wheat in a sub-humid region in relation to optimizing the amount of available water;Benbi;Journal of Agricultural Science Cambridge,1990
5. Nitrate distribution and accumulation in an Ustochrept soil profile in a long-term fertilizer experiment;Benbi;Fertilizer Research,1991