222 FIELD CROPS FOR THE COTTON-BELT 



On a large percentage of the farms in the cotton-belt 

 farmers cannot keep sufficient live-stock to depend on 

 barnyard manure as the principal source of organic mat- 

 ter for all of the cultivated land. Hence, it is neces- 

 sary that the manure be supplemented with green- 

 manures. The following data relative to the use of 

 green-manures in corn production was secured by the 

 Alabama Station: 



TABLE 18. RESULTS FROM THE ALABAMA STATION SHOWING VALUE 

 OF STUBBLE AND VINES OF VELVET BEANS AND COWPEAS 

 AS FERTILIZER FOR CORN l 1901 



The profits resulting from the application of vegetable 

 matter to corn land cannot be measured by the crop 

 yield immediately following the application. A marked 

 residual effect is usually noticed for a number of years 

 following the treatment. 



270. Lime for corn. A review of the experimental 

 evidence regarding the use of lime for corn strongly indi- 

 cates that corn is not a lime-loving plant. According to 

 the Bureau of Soils, United States Department of Agri- 



1 Ala. Agr. Exp. Sta. Bui., 134. 



