512 



The Storage of Farmyard Manure 



in degree from the loose heaps. We shall, therefore, discuss them 

 all together. 



Loose heaps. Alongside of the compact heap of cow manure was 

 one that had been thrown together only, and not compacted. The 

 greater degree of looseness allowed a freer access of air, and in con- 

 sequence the temperature rose higher. The loss of dry matter instead 

 of being 4 % as in the .compact heap, was 9 %, and the maximum 

 temperature rose to 16° C. In another experiment heaps of bullock 

 manure were put up which contained less faeces, and therefore could 



/NITROGEN, 



IS 



? 



IQ 



ff 



7^ 



A- 



61 



Ar Start 



Fig. 2. Changes in nitrogen compounds in farmyard manure (cow manure) kept 

 for three months, January 2.3 to April .30, 1914. 



not be compacted nearly so well as the cow manure, so that a greater 

 degree of aeration was attained. The two experiments were not made 

 simultaneously, but there was sufficient similarity in external conditions 

 to allow of a general comparison. The chief results are as follows : 



