THE RESULTS presented in this report were obtained 

 in 1915 under an informal cooperative agreement 

 between the Office of Acclimatization and Adaptation of 

 Crop Plants, of the Bureau of Plant Industry, and the 

 Office of Extension Work in the South, of the States Rela- 

 tions Service. 



The writer wishes to acknowledge the cordial cooperation 

 of the various State, district, and county agents of the 

 last-named office and the assistance rendered by the many 

 farmers who were interested in the experiments. 



