WHEAT. 89 



ordinary wages for their own labor, and paying 

 expenses, they do not realize legal interest on 

 the money invested in their land and improve- 

 ments. This need not and should .not be the 

 case. In many parts of England, more is paid 

 yearly as rent than would purchase land equally 

 as good in this country ; yet these renters not 

 only live well, but frequently become wealthy. 

 We will now show what quantity of the ele- 

 ments that can be applied as manures the above 

 named crops contain. 



WHEAT. 



Twenty-five bushels of wheat, of 60 Ibs. to the 

 bushel, the estimated product of an acre, weigh 

 1500 Ibs. ; the straw for this weight of grain will 

 average 3000 Ibs. The wheat and straw contain 

 the following weights of the elements, which is 

 the amount of each taken from each acre of land 

 by such a crop : 



Grain. Straw. Total. 



* Ammonia.. ..41-71 Ibs. 10.18 Ibs. 51-89 Ibs 



Phosphoric acid..l5'00 

 Sulphuric acid.. . T80 



Lime 1*35 



Magnesia 4*65 



Potash 12-00 



Silica.. ... 1-05 



11-10 " 26-10 



5-10 " 6-90 



12-00 " 13-35 



5-10 " 9-75 



.23-70 " 35-70 



143-10 " 144-15 



The Table shows also the relative amounts of 

 the different elements required to raise wheat. 



* In this and similar cases the "elements of ammonia" are meant. 



