THE FERTILIZING VALUES OF FEEDINGSTUFFS 325 



Thus sheep manure is the most valuable. Horse manure ranks 

 second, while cow manure ranks third, and pig manure last. 



Loss of Liquid Manure. — If the liquid manure or urine 

 is not saved, the manure loses a large part of its fertilizing 

 value. In case of the Illinois experiment with eight steers 

 already mentioned, 49 per cent of the nitrogen excreted 

 was in the urine, and 51 per cent in the feces. Practically 

 all of the phosphorus was excreted in the dung. In the 

 Illinois and Pennsylvania experiments with milch cows al- 

 ready noted, about one-third of the nitrogen consumed was 

 excreted in the dung and one-half in the urine. Most of 

 the phosphorus was excreted in the dung, and a larger part 

 of the potassium was excreted in the urine. 



Van Slyke ^ presents the following table showing the rela- 

 tive amounts of plant-food constituents in the dung and urine : 



" Fertilizers and Crops," p. 296. 



