Com Growers' Association. 



349 



One method of soil improvement. Oowpeas sown in corn at last cultivation. 



City Experimental Field, 1907. 



Monroe 



It will be seen from the results at Monroe City that on corn 

 the treatments that have brought the profitable returns are those 

 of cowpeas and lime and of cowpeas, lime and phosphorus. The 

 addition of potassium to the combination gave only a slight in- 

 crease and the added expense cut down the net return. It will be 

 observed, too, that when the plots are compared in such a way as 

 to note the effect of the individual treatments, lime has given quite 

 consistent returns as has also phosphorus, while both cowpeas and 

 potassium are variable. In the case of the cowpeas this is partly 

 due to the fact that cowpeas sown in the corn at the last plowing 

 sometimes decrease the yield of corn slightly, especially when the 

 latter part of the season is dry. The injury, however, is rarely of 

 much importance, and is not usually comparable to the value to be 

 received from their effect on after crops. 



The results on wheat show again that the greatest financial re- 

 turn is secured with cowpeas, lime and phosphorus, although the 

 treatment of cowpeas, lime and the complete treatment of cowpeas, 

 lime, phosphorus and potassium both brought good financial re- 

 turn. They show, too, that phosphorus brought the largest return 

 when the treatments are considered separately, while lime and 



