Bui. 721, U. S. Dept. of Agriculture. 



Plate III. 



FiQ. 1.— Blocking and Thinning Sugar Beets, an Operation That Must Be Per- 

 formed BY Hand as Soon as the Beets are Large Enough. 



Fig. 2.— Flooding a Field of Sugar Beets, a Method of Irrigation Which 

 Destroys the Stand of Beets and Injures the Soil. 



