1. Aarnink, A. J. A., P. Hoeksma, and E. N. J. Ouwerkerk. 1993. Factors affecting ammonium concentration in slurry from fattening pigs. Pages 413–420 in Proc. First Int. Symp. Nitrogen Flow in Pig Production and Environmental Consequences. EAAP Publ. No. 69. Pudoc, Wageningen, the Netherlands.
2. Official Methods of Analysis;AOAC,2006
3. Determination of nutrient mass balance in turkeys;Applegate;Poult. Sci.,2008
4. Model for estimating poultry manure nutrient excretion: A mass balance approach;Applegate;Int. Symp. Anim. Agric. Food Proc. Wastes,2003
5. Effect of amino acid formulation and amino acid supplementation on performance and nitrogen excretion in turkey toms;Applegate;Poult. Sci.,2008