FIELD EXPERIMENTS IN THE SOUTH 



487 



in northwestern Illinois, which furnish additional information 

 concerning the general need of nitrogen for these hill lands. 



The plan of these experiments, the soil treatment applied, and 

 the results obtained are all shown in Table 98.1, and they require no 

 further comment. 



TABLE 98.1. OAT YIELDS FROM HENRY COUNTY (ILLINOIS) SOIL 

 Pot-culture Experiments 



The Mississippi Experiment Station has reported in Bulletin 108 

 one year's experiments (1906) at Holly Springs in the northwest 

 part of that state, on similar worn hill land where fertilizers were 

 used for cotton, corn, and cowpeas. The following comments are 

 made: 



"Phosphates hastened the maturity of cotton. On land with some decaying 

 organic matter in it, phosphate alone gave good results, good enough to make 

 it profitable. Potash alone, or in combination with nitrogen and phosphates, 

 gave no apparent results. Nitrogen (cotton-seed meal) alone gave good re- 

 sults. Cotton-seed meal and phosphates mixed gave good results." 



Similarly, in referring to the corn and cowpeas, the following 

 statements are made: 



"The land was thin upland. A drought of seven weeks obtained when the 

 corn was young. Where the soil contained organic matter, phosphates alone 

 gave good results. Potash alone, or in combination, failed to show any appre- 



