1. Boyd, William H., 1990. The effect of poultry waste on ground and surface water. Pages 223–227 in: Proc. 1990 Natl. Poultry Waste Management Symposium, Raleigh, NC.
2. Beegle, Douglas B., 1990. Manure nutrient management plans for crops. Pages 214–220 in: Proc. 1990 Natl. Poultry Waste Management Symposium, Raleigh, NC.
3. Reducing nitrogen excretion of the laying hens by feeding lower crude protein diets;Summers;Poultry Sci.,1993
4. The dietary-fecal relationship of calcium and phosphorus levels in White Leghorn hens;Damron;Poultry Sci.,1975
5. Livestock Waste Testing Laboratory, Suwannee Valley AREC, IFAS, Route 2, Box 2181, Live Oak, FL 32060.