Farmyard Manure. 



65 



It will appear from these analyses that in well-rotten farmyard 

 manure the soluble constituents are more readily wasted than is 

 the case with fresh dung kept in the same manner. On the 

 other hand, the percentage of insoluble organic matters, practi- 

 cally speaking, sustained no diminution by keeping the manure 

 in a heap exposed to the weather from December 5th, 1854, to 

 April 30th, 1855. In the two succeeding periods, embracing 

 the warmer months of the year, an appreciable loss in the inso- 

 luble organic matters appears to have taken place ; and it is 

 in the two last periods that the soluble constituents have been 

 wasted more abundantly than in the preceding months. 



The nature of this loss will become more conspicuous if we 

 calculate from the foregoing data the composition of the whole 

 experimental heap No. IV. This has been done in the sub- 

 joined Table : 



Table showing Composition of Whole Heap (No. IV.), Well-rotten Dung, 

 Exposed. In Natural State. Expressed in Ibs. and fractions of Ibs. 



A careful comparison of these analytical results will show : 



1. That well-rotten dung loses little in substance during the 

 colder months of the year, provided no heavy rain falls. Should 

 there be continued rainy weather, the result, I have no doubt, 

 would be different from that obtained in my experiments. 



2. In the warmer months of the year rotten dung decreases in 

 bulk and in weight more rapidly than in the colder seasons of 



