129 



The legumes were grown in drills and cultivated and 

 niaderatelv fertilized with acid phosphate or with phos- 

 phate and some potash salt. The crops, corn, cotton, 

 oats, wheat, sorghum, and rye, used to measure the 

 fertilizing effects of the legumes, have received no appli- 

 cation of nitrogen, but have been fertilized with phos- 

 phate and potash. 



The soil in all tests is rather poor to extremely poor 

 deep sandy upland, the white or gray being almost a 

 pure sand and the reddish soil approaching a loam with 

 clavev loam subsoil in the latter case. 



The vines or stubble of the legumes have been plowed 

 under just before the planting of the next crop. 



The variety of cowpeas employed was the Wonderful 

 or Unknown. 



In valuing the crops the endeavor has been made to 

 use conservative average prices, the error, if any, be- 

 ing in putting them too low rather than too high. Lint 

 cotton has been rated at 6f cents per pound, cotton 

 seed at §7.50 per ton, sorghum hay at |6.67 per ton, corn 

 at 50 cents, oats 40 cents, and wheat 80 cents per 

 bushel. So record is here made of the increase in the 

 yields of grain, straw or corn stover, assmuing that this 

 has been about sufficient to cover the increased cost of 

 harvestino- and threshing. 



a 



Time to Plow in Cowpea Vines. 



On a gray sandy upland soil the vines of drilled 

 co^\'peas were plowed under in the late fall of 1898 and 

 1900, while on other plots plowing was deferred until 

 nearly planting time. 



The vields of corn were as follows : 



