CROPPING SYSTEMS, FERTILIZERS FOR CORN 219 



crop in the rotation. The rotation was first year, potton; 

 second year, corn and cowpeas; third year, oats followed 

 by cowpeas. 



In the fertiUzing of this rotation the cotton received 30 

 bushels per acre of a compost made by mixing two tons of 

 acid phosphate with a hundred bushels each of stable 

 manure and cotton seed. The corn received 30 bushels to 

 the acre of a compost made by mixing one ton of atid 

 phosphate with 100 bushels of stable manure and 100 

 bushels of cotton seed. The oats received 200 pounds of 

 cotton-seed meal and 100 pounds of acid phosphate to the 

 acre, and the cowpeas 50 pounds of acid phsophate and 

 50 pounds of kainit to the acre. The results for 19 years 

 follow: 



Table 16. Louisiana Field Experiments at Calhoun. 

 Average Yields to the Acre pok Period op 19 Years ' 



267. The place of com in a rotation. — Corn will utilize 

 more profitably than most other field crops organic matter 

 that is only partially decayed. It also requires an abun- 

 dance of nitrogen. For these reasons the rotations through^ 

 iLa. Agr. Exp. Sta., Bui. Ill, 1908. 



