WHEAT 



47 



In those parts of the South where red clover is grown, 

 a good three-year rotation is : — 



First year : wheat, with red clover seed. 



Second year : red clover. 



Third year: corn. 



Wheat is again grown the fourth year. 



Where neither red clover nor cotton succeeds, crimson 

 clover may be used instead of red clover, as follows : — 



First year: late corn, cultivated late, and the middles 

 seeded to crimson clover in September. 



Second year: tobacco, late corn, or other summer crop 

 not requiring early planting. 



Third year : wheat, followed by cowpeas. 



In those parts of the cotton-belt where, red clover does 

 not thrive, the following four-year rotation is often desir- 

 able: — 



First year: cotton, with crimson clover seeded in 

 September between the rows. 



Second year: cotton. 



Third year: corn, with cowpeas between the rows. 



Fourth year: wheat, followed by cowpeas. 



50. Fertilization. — A crop of 25 Bushels of wheat, with 

 its accompaniment of say 2500 pounds of straw, removes 

 from the land approximately the following amounts of 

 plant-food : — 



Nitrogen . . 

 Phosphoric acid 

 Potash . . . 



In Grain In Straw In Grain and Straw 



25.9 



14.4 



5.3 



10.8 

 3.3 



18.5 



26.7 

 17.7 

 23.8 



