TTHEAT 



47 



111 those parts of the South -^'here red clover is groTVTi, 

 a good three-j'ear rotation is : — 



First year: wheat, ^^-ith red clover seed. 



Second year : red clover. 



Third year: corn. 



Wheat is again grown the fourth j-ear. 



Where neither red clover nor cotton succeeds, crimson 

 clover niaj' 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 follomng four-year rotation is often desir- 

 able : — 



First year: cotton, wdth crimson clover seeded in 

 September between the rows. 



Second j'ear: cotton. 



Third year: corn, with cowpeas between the rows. 



Fourth year: wheat, followed by coT\'peas. 



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

 its accompaniment of say 2.500 pounds of straw, removes 

 from the land approximately the foUowing amounts of 

 plant-food : — 



Xitrogen . 

 Phosphoric acid 

 Potash . 



In Grain 



25.9 



14.4 



5.3 



In Straw 



10.8 



3.3 



18.5 



In Grain j^nd Straw 



26.7 

 17.7 

 23.8 



