LIST OF ILLUSTRATIONS xxxi 



FIGURE PAGE 



174. Forms of kernel in three different varieties of buckwheat 



(Boettcher, from Photograph) 581 



175. Spikelet and caryopsis of rice (Boettcher) .... 600 



176. Panicle of Honduras rice (Chambliss) .... 605 



177. Panicle of Wataribune rice (Chambliss) .... 607 



178. Kice field ready for harvest near Jacksonboro, S. C. (Cham- 



bliss) 612 



179. One hundred acres of rice in the early stage of growth, near 



Colusa, Cal. (Ball) 613 



180. Kernels and caryopsis of Honduras rice (Boettcher) . . 615 



181. Kernels and caryopsis of Wataribune rice (Boettcher) . 617 



182. Neches main irrigation canal near Beaumont, Tex. (Cham- 



bliss) 623 



183. Harvesting rice with the self binder near Beaumont, Tex. 



(Chambliss) * . .627 



TABLES 



TABLE 



I. Results of the selection of large and small seed at the 



Ontario Experiment Station 184 



II. A. Number of kernels in equal weights of different 

 grades of Purple Straw wheat. B. Number of ker- 

 nels in equal volumes of different grades of wheat . 186 



III. Temperature and rainfall in several localities in Russia 



and the United States 255 



IV. Absolute and relative humidity at several points in east 



Russia, the Crimea, and in the Great Plains . . 261 

 V. Water requirement ratio for several important cereal 



varieties 267 



VI. A comparison of rotation with continuous cropping for 



winter wheat at the Kansas Experiment Station . 345 

 VII. Effect of different methods of cropping on the yield of 



wheat, at Modesto, Cal 384 



VIII. Effect of different methods of cropping on the yield of 



wheat on heavy soils, at Davis, Cal 386 



IX. Percentage of moisture in each of the first six feet of soil 



in fallowed and continuously cropped plats . . 391 

 X. Formation of nitrates in fallowed and non-fallowed land . 394 



