\\i\, 582, U. S. Dept. of Aericulture. 
Plate IV. 
Fig. 1.— A Broad, Shallow, Weed-Covered Irrigation Ditch— The Usual Condition. 
It is exceedingly difficult to keep the land clean when every irrigation after midsunnner deposits 
fresh weed seed. 
Fig. 2.— A Strawberry Field on Provo Bench. 
Bare spots in the rows indicate the presence of insect pests. 
