LIST OF ILLUSTRATIONS xxi 



no. PAGK 

 68, 69. Varieties of Corn. (Alabama Experiment Station) 123, 124 



70. Showing the Immediate Effects of crossing a White Pop 



Corn with Pollen from a Yellow Dent Corn . . .127 



71. Relative Yields of the Same Variety of Corn from 2 Breed- 



ing Rows of the Same Length. (Oklahoma Experiment 



Station) 132 



72. Diagram showing Arrangement of Rows in Corn Breeding- 



plot 134 



73. Germinator made from a Soap Box. (Office of Experiment 



Stations, U. S. Dept. Agr.) . . . . . .139 



74. Showing Injury from. In-breeding Corn. (U. S. Department 



of Agriculture) . ....... . . . . 141 



75. Showing Larger Yield on Row not In-bred. (U. S. Depart- 



ment of Agriculture) . . . . . 141 



76. Young Corn Plants, from Tip, Middle, and Butt Kernels. 



(Michigan Experiment Station) . 146 



77. A Stalk-cutter. (B. F. Avery & Sons Co.) . . . . 158 



78. A Subsoil Plow. (L. H. Bailey) . . . ... 163 



79. A Turn-plow. . . , ..*,.. . . 164 



80. A Disk-plow. (B. F. Avery & Sons Co.) . . . . 165 



81. Combined Lister and Corn Planter. (U. S. Department of 



Agriculture) 165 



82. A One-row Corn Planter. (B. F. Avery & Sons Co.) . . 167 



83. Diagram of Young Corn Plants . . ,.:.''. v\ . 168 



84. Hand Corn Planter, for Replanting . . . . 169 



85. A Spike-tooth Harrow. (B. F. Avery & Sons Co.) . . 171 



86. A Weeder. (L. H. Bailey) 172 



87. A One-horse, Spring-tooth Harrow. (B. F. Avery & Sons 



Co.) 173 



88. Check-row Corn Planter with Double Disks to open a Deep 



Furrow. (U. S. Department of Agriculture) . . .175 



89. Cowpeas growing between Rows of Corn .... 182 



90. The Williamson Method of Corn Culture .... 186 



91. Condition of Surface after "Laying by" Corn according to 



the Williamson Plan 187 



92. Showing "Throw-board" on Wagon-body used in Harvest- 



ing Corn. (Oklahoma Experiment Station) . . . 190 



