xvi ILLUSTRATIONS 



40. Spring Wheat Production. 106 



41. Winter Wheat Production 107 



42. Bread Wheats 110 



43. Durum Wheat Group 112 



44. Spelt Wheat Group 113 



45. The Principal Wheat Regions, According to Type of Wheat Grown. . 114 



46. Distribution of Durum Wheat 115 



47. Types of Wheat Grains 117 



48. Grains of Spelt Wheat Group 118 



49. An Example of Selection 1 18 



50. Drilling Wheat with a Double Disc Drill 128 



51. Distribution of Oat Production 142 



52. Distribution of Oat Production in the United States 143 



53. Loose Type of Side Panicle, Sparrow bill 144 



54. Compact Side Oats, and Open Type of Semiside Oats. Varieties, 



Clydsdale and Black Finnish ' 145 



55. Types of Oat Grain 146 



56. Three Types of Early Oats, of Open Panicle Type 147 



57. Large White Oats, Open Panicle, Variety Big Four, and Chinese Hul- 



less Oats 149 



58. Oats Harvest in Nebraska 168 



59. G9od Shocks of Oats, Well Capped 169 



60. Distribution of Barley Production in the World 175 



61. Distribution of Barley-Production in United States 176 



62. Heads of Six-row, Four-row, and Two-row Barley 177 



63. Difference Between Zeocriton Type and Distichum Type, Both Six-row 



and Two-row .- 178 



64. Comparison of Two-row and Six-row Barley Grains. 179 



65. Kernels of Hulless Barley 179 



66. The Hooded or Trifurcate Type and Awned Barley 180 



67. Types of Six-row Barley 182 



68. Types of Two-row Barley 183 



69. Four Types of Hulless Barley Kernels 184 



70. Comparison of Spikelets of Six-row and Two-row Barleys 185 



71. Distribution of Rye Culture in the World 190 



72. Rye 191 



73. Distribution of Buckwheat in United States ' 197 



74. Types of Buckwheat Grain 199 



75. An American Short-staple, Upland Variety, Culpepper 208 



76. An American Long-staple, Upland Variety, Allen's Early 209 



77. The Flower of Upland Cotton, Viewed from the Side 211 



78. Showing the "Squares" of Cotton the Unopened Buds Enclosed by 



the Bracts 211 



79. Showing the Opening of the Cotton Ball; and the Lock Cotton, or 



Seed Cotton 212 



80. The Fiber of an Upland Short-staple Variety 213 



81. The Fiber of an Upland Long-staple Variety 213 



82. Showing the Three Classes of Cotton Fibers 214 



83. Showing Two Types of Cotton Seed 215 



84. A Field of Upland Cotton in September 219 



85. Cultivating the Corn Field with a Weeder Before the Crop has Come 



Up 230 



86. The Use of Two-row Riding Cultivators . 231 



87. Cotton Cultivation with a Single-row Cultivator 232 



88. Production of FlaxSeed in the World 240 



89. Distribution of Flax Production (Seed) in United States 241 



90. Flaxseed Balls 242 



