470 BOARD OF AGRICULTURE. 



Composition of Glover Roots, No. I, (from brow of the hill.) 



Moisture 4.34 



*Organic matter 26.53 



Mineral matter. 69.13 



100.00 



*Containing nitrogen 816 



Equal to ammonia 991 



According" to these data an acre of land will yield 3 tons 12 

 cwts. of nearly dry clover roots, and in this quantity there will 

 be about 66 lbs. of nitrogen. 



The whole of the soil from which the roots had been picked out 

 was passed through a half-inch sieve. The stones left in the 

 sieve weighed 141 lbs. ; the soil which passed through weighing 

 218 lbs. 



The soil was next dried by artificial heat, when the 218 lbs. 

 became reduced to 185.487 lbs. 



In this partially dried state it contained : 



Moisture 4.21 



*Organic matter 9.78 



fMineral matter 86.01 



100.00 



*Containing nitrogen ^ 391 



Equal to ammonia 



flncluding phosphoric acid 264 



I also determined the phosphoric acid in the ash of the clover 

 roots. Calculated for the roots in a nearly dry state, the phos- 

 phoric acid amounts to .287 per cent. 



An acre of soil, according to the data furnished by the six 

 inches on the spot where the clover was thin, produced the follow- 

 ing quantity of nitrogen : 



Ton cwts. lbs. 



In the fine soil 1 11 33 



In the clover roots 66 



Total quantity of nitrogen per acre 1 11 99 



The organic matter in an acre of this soil, which cannot be 

 picked out by hand, it will be seen, contains. an enormous quantity 

 of nitrogen ; and although probably the greater part of the roots 

 and other remains from the clover crop may not be decomposed so 

 thoroughly as to yield nitrogenous food to the succeeding wheat 

 crop, it can scarcely be doubted that a considerable quantity ol 

 nitrogen will become available by the time the wheat is sown, and 

 that one of the chief reasons why clover benefits the succeeding 



