Bu . 23 Bureau of Plant Industry, U. S. Dept. of Agriculture. 



Plate VI! 



"#^*^ ■ WL~J£± -V 





Fig. 1.— Field of Berseem before Flowering. 



Fig. 2.— Embankment Dividing Two Irrigation Basins. 



ifPHi^ 



Fig. 3.— Flood Gate for Irrigation Basins Shown in Fig. 2. 



