FIG. 78. COBB'S COTTON, 1912 NOT SUBSOILED 



FIG. 79. COBB'S COTTON, 1912 SUBSOILED 



Under date of Sept. 14, 1912, Mr. Cobb wrote that the 1911 crop on the sub- 

 soiled plot yielded 1,500 Ibs. per acre as compared with 800 Ihs. yield per acre of 

 the unsubsoiled portion, and that the 1912 crop would probably be still better on 

 the'subsoiled plot. Both plots received the same cultivation and the usual fertiliza- 

 tion with stable manure and guano. 



97 



