1. Bremner, J M, Blackmer, A M and Bundy, L G 1978. Problems in the use of nitrapyrin to inhibit nitrification in soils. Soil Biol. Biochem. 10: 441–442.
2. Cai, D T, and Fu T G 1985. Investigations on the efficiency of split application of nitrogen fertilizers using 15N tracer technique. (in Chinese). J.Nanjing Agric. Univ. No. 2, 82–88.
3. Cai, G X 1986. Ammonia loss from nitrogen fertilizers applied to flooded rice. In: Soil Agricultural Chemistry and Soil Biology and Biochemistry Committees, Soil Science Society of China (eds.), Advances and Prospects for Soil Nitrogen Research in China. (in Chinese). pp. 55–67. Science Press, Beijing.
4. Cai, G X 1988. Gaseous Loss of Nitrogen from Fertilizers Applied to Flooded Rice. Ph.D. Thesis, University of Queensland, Australia. 275 pp.
5. Cai, G X, Zhang, S L and Zhu, Z L 1981. Characteristics of nitrogen mineralization of paddy soils and their effect on the efficiency of nitrogen fertilizer. In: Institute of Soil Science, Academia Sinica (ed.), Proc. of Symp. on Paddy Soil, pp. 793–799. Science Press, Beijing