CHAPTER 5 



BARNYARD, STABLE AND GREEN MANURES 



Barnyard and stable manure consists of the solid and liquid void- 

 ings of the farm animals mixed with various kinds and amounts of bedding. 

 The term stable manure designates manure just as it comes from the 

 stable in its fresh state. Yard manure applies to that which has accu- 

 mulated or been kept for some time in piles in the barnyard. Fresh 

 manure means that which is only a few hours or, at most, a few days old. 

 The term rotted manure is used to designate that which has gone through 

 considerable fermentation and is more or less disintegrated. The term 

 mixed manure applies to that of the different species of farm animals 

 when brought together in the same manure heap. 



Manure an Important Farm Asset. — The manure of farm animals is 

 the most valuable by-product of American farms. Numerous tests and 

 analyses have been made to determine the amount and composition of 

 both the liquid and solid excrements for different classes of farm animals. 

 The average yield of fresh manure and its content of essential plant-food 

 constituents, together with the yearly value of these, is given in the fol- 

 lowing table for different classes of animals. The calculations in this 

 table are based on the composition of the solid and liquid excrements 

 given in a subsequent table in this chapter. The plant-food constituents 

 are valued as follows: nitrogen eighteen cents a pound, phosphoric acid 

 four cents a pound, potash five cents a pound. 



Average Yield and Yearly Value of Fresh Manure of Farm Animals, 

 Exclusive of Bedding. 



Kind of Livestock. 



Cow . . . 

 Horse. . 

 Pig.... 

 Sheep. . 

 Poultry 



Amount 



of 

 Manure 

 Yearly, 

 pounds. 



28,000 



15,000 



3,000 



1,140 



30 



Pounds of Ingredients Yearly. 



Nitrogen. 



Phosphoric 

 Acid. 



Potash. 



Yearly 

 Value. 



124. 

 96. 

 14.4 

 11.02 

 .414 



50. 



42. 

 9.54 

 4.75 

 .15 



132. 

 81. 

 11.4 



9.88 

 .123 



$30.92 



23.01 



3.54 



2.67 



.087 



The following table gives the numbers of the different classes of farm 

 animals in the United States according to the census of 1910, together with 

 the calculated value of manure for each class, the calculations being based 

 upon the valuation of manure given in the preceding table. In case of 

 cattle, the valuation has been reduced, the reduction being based on the 



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