A Comparison of Nitrogen and Energy Determinations on Fresh and Oven-Air Dried Cattle Feces

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Abstract
Small but consistent losses of nitrogen, average of 5.15%, occurred upon drying, as well as the liberation of 727 mg CO2/ 100 g of fresh feces. Average levels of the determinations of gross energy were 66.31, 71.17, and 71.24 Calories per 100 g of fresh feces for the ethyl alcohol, benzoic acid, and oven-air dry methods, respectively. The composite standard errors between duplicates for energy determinations, expressed as Calories per 100 g of fresh feces, were 3.70, 2.17, and 0.22 for the ethyl alcohol, benzoic acid, and oven-air dry methods, respectively. Under the conditions of drying fresh cow feces employed in this experiment, only small losses of N occurred, and there was no loss of gross energy.

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