1. Soil nitrogen and efficient utilization of nitrogen fertilizers;Cai,1998
2. Evaluation of gaseous nitrogen losses from fertilizers applied to flooded rice fields;Cai;ActaPedologica Sinica,1995
3. Ammonia volatilization from urea applied to the field of wheat and rice in southern Jiangsu Province;Cao;Journal of Nanjing Agricultural University,2000
4. The economic and ecological satisfactory amount of nitrogen fertilizer using on rice in Tai Lake region;Cui;Acta Ecological Sinica,2000