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 



59. White Vienna kohlrabi. It is a heavj- yielder of both tubers and 



leaves. Background of six-inch squares (Cornell Fxperiment 

 Station) 309 



60. 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 iverwis (H. L. Bolley) 340 



63. Field of Russian brome grass (Bromus inermis) 343 



