FARM MANURES 



587 



sheep, varying so greatly in weight, will excrete such 

 widely different quantities that it is difficult and mis- 

 leading to express the amount based on the individual. 

 A clearer method of comparison is that employed below, 

 in which a thousand pounds in weight of animal is made 

 the basis of the calculation : 



MANURE EXCRETED BY VARIOUS FARM ANIMALS TO THE 1000 

 POUNDS LIVE WEIGHT 



It is quite evident that, for the weight of animal, the 

 swine and the cow give the heaviest production of manure 

 on the farm, but it should be remembered also that they 

 consume the greatest amount of food. Whether these 

 animals are the most economical in production of manure 

 must depend largely on age and individuality. 



1 Roberts, I. P., and Wing, H. H. On the Deterioration of 

 Farmyard Manure by Leaching and Fermentation. Cornell 

 Univ. Agr. Exp. Sta., Bui. 13. 1889. Also, Roberts, I. P. 

 The Production and Care of Farm Manure. Cornell Univ. 

 Agr. Exp. Sta., Bui. 27. 1891. Also, Watson, G. C. The 

 Production of Manure. Cornell Univ. Agr. Exp. Sta., Bui. 56. 

 1893. 



2 Thome, C. E. Farm Manures, p. 97. New York. 1914. 



3 Thome, C. E., and others. The Maintenance of Fertility. 

 Ohio Agr. Exp. Sta., Bui. 183. 1907. 



4 Watson, G. C. The Production of Manure. Cornell Univ. 

 Agr. Exp. Sta., Bui. 56. 1893. 



5 Van Slyke, L. L. Fertilizers and Crops, p. 294. New 

 York. 1912. 



