Bui. 107, U. S. Dept. of Agriculture. 



PLATE V. 



FIG. 1. WORK OF CHICKENS ON AN INFESTED FIELD. 



[This shows the second crop of alfalfa well started in a part where chickens had been allowed 

 to feed. The stake in the left foreground j s about 3 inches high.] 



FIG. 2. PART OF SAME FIELD WHERE CHICKENS HAD NOT FED. 



[Note the dry leafless stubble of the first crop two weeks after cutting. Photographs taken the 



same day.] 



