38 



SOILS. 



MANURES. 



&quot;We see by the first of these tables, that in the wheat grain we have, in 1,000 pounds, on 

 the average, about 21 Ibs. of nitrogen; 5 Ibs. of potash and 7.9 Ibs. of phosphoric acid. In 

 the same amount of wheat straw there would be 4.8 pounds of nitrogen; 6.3 Ibs. of potash 

 and 2.2 Ibs. of phosphoric acid. In 1,000 Ibs. of hay, made from the common grasses, we 

 would have 15.5 Ibs. of nitrogen; 13.2 Ibs. of potash, and 4.1 Ibs. of phosphoric acid. In 

 1,000 Ibs. of ordinary clover hay there would be 21.3 Ibs. of nitrogen; 18 Ibs. of potash 

 and 5.6 Ibs. of phosphoric acid. 



