158 



period 7.51) inclics of rain IVU in a space of ten days. 



Tlie expcriiiH'iit seems to teacli tliat on very li<2:ht, 

 urav, sandy indand, siihiect also to surface wasliini;-, tlie 

 ferliliziiiii- drtM'ts of even lar^c amounts of nitroj^en fnr- 

 nislieil by preceding crops of legumes may be removed 

 frcnn the soil witliin twelve months after the legume 

 has been i)1()\\(m1 in. Tlie lesson might also be drawn 

 that on such soils the planting of any non-leguminous 

 crop after small grain is risky, but that if such a crop 

 is employed the seed should be put into the ground 

 as soon as possible after the removal of the grain crop. 



An experience like this in which the fertilizing effect 

 of the entire or nearly entire growth of the legume 

 was no greater than that of the stubble on either the 

 first or on the second succeeding crop emphasizes the 

 ^N'isdom of utilizing the vines of cowpeas, etc., for food, 

 leaving only the roots and stubble to fertilize the next 

 crop. 



Immediate Fertilizing Effect on Wheat of Cowpea 

 AND Velvet Bean Vines and Stubble. 



All the plots of the last mentioned experiment were 

 in oats from February to June, 1900. 



June 23, 1900, certain plots were planted with drilled 

 cowpeas, certain others with drilled velvet beans, and 

 yet others were merely plowed and fertilized with 

 minerals, as were the legumes. 



Of the two plots of cowpeas, one was cut for hay, 

 yielding 2,004 pounds per acre; on the other 7.9 bushels 

 of seed per acre were picked. One plot of velvet beans 

 was cut for hay, while on the other the vines were left 

 on the ground for fertilizer. The cowpea plants, va- 

 riety Wonderful, were somewhat injured by a fungous 

 disease of the roots; velvet beans, by reason of late date 



