AGRICULTURAL SEEDS, SELECTION AND TESTING 



263 



Barley. Wild oats, black bindweed or wild buckwheat, and sunflower. 

 Blue-grass. Peppergrass, sour sorrel, chickweed, and sedges. 

 Cane. Russian thistle. 



Millet. Tall pigweed, ragweed, lamb's quarters, sunflower, Russian 

 thistle, smartweed, green foxtail, yellow foxtail. 



FIG. 113. Alfalfa of good quality. Natural size and magnified 9 times. (After 

 Brown, Edgar and Crosby, Mamie L.: Imported Low-grade Clover and Alfalfa Seed. 

 Bull, in, Part III, Bureau of Plant Industry, 1907). 



FIG. 114. Imported alfalfa of low grade. Natural size and magnified 9 times. 

 (After Brown, Edgar and Crosby, Mamie L.: Imported Low-grade Clover and Alfalfa Seed. 

 Bull, in, Part III, Bureau of Plant Industry, 1907.) 



Oats. Wild oats, black bindweed or wild buckwheat, lamb's quarters, 

 sunflower, and Russian thistle. 



Red Top. Rugel's plantain, yarrow, sedge, rush, and five-finger (Figs. 

 115 and 116.) 



Sorghums. Pigweed, ragweed, sunflower, and Russian thistle. 



Sudan grass. Tall pigweed, lamb's quarters, sunflower, Russian 

 thistle, and buffalo bur. 



