LEGUMES FOR SEE0 



2 6 5 



experiments, the New Jersey Station concluded that in two 

 years the gain of nitrogen to the soil in which cowpeas grew 

 was equivalent to an increase of 1,600 pounds of nitrogen to 

 an acre one foot in depth. This was not all due to the cow- 

 peas, but in part to processes within *he soil itself. 1 



The Delaware Station reports that a maximum crop of alfalfa 

 yielded 1,230 pounds (200 pounds of nitrogen) of protein per 

 acre, while maximum crops of cowpeas and crimson clover 

 yielded about 725 pounds each of protein (115 pounds of ni- 

 trogen) per acre. Since, however, a crop of crimson clover and 

 of cowpeas may be grown from the same land in one season, 

 these crops are recommended where alfalfa fails to thrive. 2 

 The Alabama Station found in the entire growth of cowpeas in 

 an average of three cases 70 pounds of nitrogen per acre, 28 

 per cent, of which, or 20 pounds, was in the roots, stubble, and 

 fallen leaflets. 3 



Influence of Cowpeas and Velvet Beans on Succeeding Crops 



iNew Jersey Sta. Bui. No. 180, p. 37. 



2 Delaware Sta. Bui. No. 55, pp. 3-8; Rpt. 1901, pp. 8-13 



3 Alabama Sta. Bui. No. 120 (1902), p. 123. 



