THE THREE CS COWS, CORN AND CLOVER 113 



air, and thus increases the store of nitrogen in the soil. 

 We have learned that nitrogen is the principal ingre- 

 dient in protein, the feed most sought after by the pro- 

 gressive farmer. From an examination of the table, 

 we find that clover hay is richer in protein than any 



COWS IX A CLOVER FIELD. 



other kind of hay. A little calculation shows us that 

 it contains about twice as much protein as redtop, 

 three times as much as timothy, eight times as much 

 as oat straw, fifteen times as much as rye straw, and 

 thirty times as much as wheat straw. On average 

 land a larger amount of clover, or some other legume 

 adapted to the soil, can be grown per acre than of any 

 other hay crop, and, since it adds nitrogen to the soil, 

 it is by far the best hay crop to raise. 



Corn. Another examination of the table reveals 

 the fact that corn is one of the richest of grains, and 

 since corn is one of the richest of fodders in feeding 



