1. Airborne reduced nitrogen: ammonia emissions from agriculture and other sources;Anderson;Environment International,2002
2. Fertiliser Recommendations for Agricultural and Horticultural Crops. MAFF Reference Book 209;Anon.,2000
3. Balsdon, S.L., Chadwick, D.R., Webb, J., Day, J., 2002. Evaluation of increased straw use as a means of reducing ammonia emission from housed cattle and pigs. In: Venglovský, J., Gréserová, G. (Eds.), Proceedings of the 10th International Conference of the RAMIRAN Network, Srbske Pleso, Slovak Republic, pp. 291–292.
4. Critical loads and the relevance of ammonia to an effects-based nitrogen protocol;Bull;Atmospheric Environment,1998
5. Dietary protein affects nitrogen excretion and ammonia emission from slurry of growing finishing pigs;Cahn;Livestock Production Science,1998