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 prom the Alabama Station Showing Value 

 OF Stubble and Vines of Velvet Beans and Cowpeas 

 AS Fertilizer for Corn ' 1901 



System 



Increase per 



Acre 



(Bushels) 



Corn f ollowmg com 



Corn following velvet bean stubble. . 

 Com following velvet beans, entire 



growth plowed under 



Com after drilled cowpea stubble 



Corn after drilled cowpeas, all plowed in 



4.3 



12.3 



8.9 



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 com. — A review of the experimental 

 evidence regarding the use of lime for corn strongly indi- 

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

 the Bureau of Soils, United States Department of Agri- 



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



