Fertilizers for Cereals and Grasses 



213 



is, therefore, relatively greater, even under the best con- 

 ditions of its use. A bushel of wheat, with its accom- 

 panying straw, will contain, for example: 



Nitrogen If Ibs. 



Phosphoric acid f lb. 



Potash li Ibs. 



It will be observed that the amounts of fertilizer ingre- 

 dients contained in the crop are such that if the seasonal 



Fio. 14. GRAIN DRILL WITH FERTILIZER SOWER. 



The grain drill with fertilizer sower has justly come into very general 

 use. It sows the seed and evenly distributes fertilizer, at the same time 

 covering both with sufficient soil. 



conditions are perfect, so that the maximum of the 

 amounts applied are recovered in the crop, the cost of 

 fertilizers to a bushel of increase is still relatively high, 

 thus showing that great care must be exercised in order 

 that a direct and immediate profit may be secured. 

 Nevertheless, since the cost of preparing the land and of 

 harvesting the crop is but slightly greater for a large crop 

 than for a small one, the larger returns for the labor very 



