I4d TALKS ON MANURES. 



was very nearly tlie same quantity of roots and nitrogen in them, 

 as That furnished in ihe soil from the brow of the hUl. 



'■ The roots, moreover, yielded .365 per cent of phosphoric acid ; 

 or, calculiited per acre, 27 lbs. 



" In ihc partially diied soil, I found : 



Moisture 4.70 



Organic icatLer* 10.87 



*lhicral matteit 84.43 



KKJ. UO 



* Coutainiug nitrogen 405 



Equal lu ammonia 491 



t Including phosphoric acid 321 



" According to these determinations, an acre of soil from the 

 bottom of the hill, contains: 



Tom. Cwtx. Lbs. 



Nitrogen in the organic matter of the soil 2 2 



Nitrogen ill clover-roots of the soil _^_ _^^ _^^ 



Total amount of nitrogen per acre 2^ 2 61 



" Compared -with the amount of nitrogen in the soil from the 

 brow of the hill, about 11 cwt. more nitrogen was obtained in the 

 soil and roots from the bottom of the hill, where the clover was 

 more luxuriant. 



" The increased amount of nitrogen occurred in fine root-fibres 

 and other organic mattei-s of the soil, and not in the coarser bits of 

 roots which were picked out by the hand. It may be assumed 

 that the liner particles of organic matter are more readily decom- 

 pose 1 than the coarser roots; and as there was a larger amount of 

 nitrogen in this than in the preceding soil, it may be expected that 

 the land at the bottom of the hill, after removal of the clover, was 

 in a better agricultural condition for wheal, tlvan that on the brow 

 of the hill. 



