lt)4 



FcrtUizhu) < ffHts of Ityunics on sorghum grown as the 



second crop. 



To ascci'taiii what dinVrciicc^s still existed in the soil 

 as a reasult of legumes <:,ro\vii in the summer of 1899, 

 sorjjhnm was sown in drills on this same field June 19, 

 1!K)0, all jtlots l»ein^ uniformly fertilized with acid 

 phosj^liate. So that soruhum thus becomes the second 

 crop after the various legumes, and is intended to re- 

 veal the residual or ''left over" effects of the summer 

 crops of 1899. 



Residual fertilizing effects on sorguhm, of peanuts, 

 cow peas and velvet beans. 



Preceding crops. 



Summer of 1899. 



Win- 

 ter. 



;i90o. 



Yield 



sorg- 

 hum 



hay per 

 acre. 



Increase 



from leg- 



, umes as 



compared 



with 



sweet 



potatoes. 



Sweet potatoes, dug 



Corn, ears pulled 



Spanish peanuts, dug; nuts removed, 



Spanish peanuts; eaten on land 



Cowpeas, picked 



Velvet beans, all plowed in 



Velvet beans, pods picked 



Running peanuts, all plowed in. . . . 

 Cotton, heavily fertilized 



Av., potatoes, corn, cotton 



Av., velvet beans, cowpeas, running peanuts 



Lbs. 



400 

 loss, 

 loss. 



400 

 1750 

 2240 



960 

 loss. 



1657 



Evidentlv rve had not exhausted all the fertilizing 

 value of the legumes. This second crop was favorably 

 affected by all the legumc^s except by Spanish peanuts, 

 the benefite of which had disappeared. The average in- 

 crease on the plots where all the other legumes had 

 grown the preceding summer was 33 per cent, as com- 

 pared with the yield on the plots w here corn, cotton and 

 sweet potatoes had constituted the summer crops in 

 1899. 



