586 -SOILS: PROPERTIES AND MANAGEMENT 



Distribution of Plant-Food Constituents between the 

 Liquid and the Solid of Whole Manure 



Excrement 



Horse 



Cow 



Sheep 



Swine 



Average 



Average for horse and 

 cow 



Percentage 

 of Total 

 Nitrogen 



Solid Liquid 



62 

 49 

 52 

 67 



57 

 55 



38 

 51 



48 

 33 



43 

 45 



Percentage 



op Total 



Phosphoric 



Acid 



Solid Liquid 



100 



100 



95 



88 



95 

 100 











5 



12 



Percent \<,i 



op Total 



Potash 



Solid Liquid 



56 

 15 

 30 

 57 



40 

 35 



44 

 85 

 70 

 43 



60 

 65 



It is seen here that a little more than one-half the 

 nitrogen, almost all the phosphoric acid, and about 

 two-fifths of the potash, are found in the solid manure. 

 Nevertheless this apparent advantage of the solid manure 

 is balanced by the ready availability of the constituents 

 carried by the urine, giving it in total about an equal 

 commercial and agricultural value with the solid excre- 

 ment. Such figures are suggestive of the care that should 

 be taken of the liquid manure. Its ready loss of nitrogen 

 by fermentation, and the ease with which all its valuable 

 constituents may escape by leaching, should make it 

 an object of especial regard in handling. 



490. Production of manure. — A well-fed, moderately 

 worked horse will produce daily from 45 to 55 pounds 

 of manure, of which from 10 to 11 pounds is urine. A 

 cow, on the other hand, having a greater food capacity, 

 will excrete from 70 to 90 pounds during the same period, 

 of which from 20 to 30 pounds is liquid. Swine and 



