LIST OF ILLUSTRATIONS Xlll 



Fig. page 



56. Germination of commercial cabbage and kohlrabi seed and num- 



ber of seeds in a pound (Cornell Experiment Station). The 

 black bars show the number of thousand seeds in a pound; 

 the light bars show the number of thousand that germinated 303 



57. Solid (at the left) and loose heads of cabbage (Cornell) 305 



58. Forms of cabbage heads. In order: Flat, spherical, obovate, 



oblong, conical (Cornell) 307 



53. White Vienna kohlrabi. It is a heavy yielder of both tubers and 

 leaves. Background of six-inch squares (Cornell ' xperiment 



Station ) 309 



GO. .Meadow of mixed grasses: Timothy, red-top and Kentucky blue- 

 grass 315 



01. Harvesting scene in meadow of mixed grasses: Timothy, red-top 



and blue-grass 323 



02. Bromus inermis (H. L. Bolley) 340 



63. Field of Russian brorne grass {Bromus inermis) 343 



