508 



The Storage of Farmyard Manure 



Berry, West of Scotland. 



Potatoes ... 

 Turnips ... 



History of manure. 

 Cow manirre stored 



Percentage composition. 

 Dry matter 

 Total nitrogen ... 

 Nitrogen as NHg 



Percentages increases. 



57 49 



45 38 



Compact under Compact in 

 cover open 



Hay 



History of manure. 

 Bullock manure 



Percentage composition. 

 Dry matter 

 Total nitrogen 

 Nitrogen as NH, 



Garforth, Leeds. 



Total yield, 1910 arid! 1911, 

 cwts. per acre 



81^5 77 



The changes taking place in the manure heap. 



Directly a manure heap is put up the temperature begins to rise. 

 Typical curves are shown in Fig. 1 : their general shape is the same in 

 all cases, there being first a rapid rise to a maximum and then a falling 

 off. The extent of the rise depends on : 



(a) the nature of the manure, — horse manure attaining a higher 

 temperature than bullock manure, which in turn becomes hotter than 

 cow manure ; 



(6) the degree of compacting, — the compact heap never becoming 

 as hot as the looser heap in the initial stages ; 



(c) whether the manure is stored under cover or in the open, — heaps 

 under cover rising to a higher temperature than those in the open; 



(d) whether the heap is left undisturbed or is turned. On remaking 

 the heap there is a considerable rise of temperature. 



The fluctuations when the heaps are stored in the open are affected 

 by the rainfall, a period of heavy rainfall being followed by a lowering 

 of temperature, and a period of drought by a rise. 



