ILLUSTRATIONS. 



PAGE 



H. ^ . Campbell Frontispiece 



Montana Wheat Field Near Great Falls 12 



Burlington Model Farm near Holdrege 16 



Feasting Time, Colorado Melons 2i 



Corn in Colorado 90 Miles East of Denver 25 



Campbell System Vegetables 29 



Montana Wheat Without Irrigation 34 



Following Harvester with the Disk 39 



Showing Soil as the Plow Leaves It 46 



Surface of Soil Harrowed without Sub-packing 47 



Showiig Soil as the Packer Leaves It 60 



Showing Soil After Packing and Harrowing 63 



The Sub-Surface Packer 64 



Development of Roots in Firm Soil 65 



Root Development in Loose Soil 67 



Germination of Wheat in Different Soils 68 



Summer Culture vs. Summer Fallow 76 



Watbf Holding Capacity of Soils Illustrated 108 



Hea\y Rain Crust, and How Broken Up 113 



Effect of Shutting Out the Air 115 



Capillary Attraction Illustrated 118 



How Water is Stored in the Soil 1 19 



A Modern Manure Spreader 154 



Development of Corn Roots 165 



Cornfield by Campbell System in North Dakota 167 



Pomeroy Farm Corn in very Hot Season 171 



Wheat in Three Stages of Growth 179 



Seeding with Different Kinds of Drills 182 



Growth of Listed Wheat 184 



Effect of Different Depths of Seeding 185 



Harvesting Wheat Fifty Years Ago 188 



Eastern Colorado Wheat 190 



Wyoming Wheat in the Dry Country 191 



Pomeroy Farm 1904 Wheat Crop 193 



Germination of Wheat in Different Soils 194 



Root Development with Shallow Cultivation 198 



Deep Cultivation and Root Development 200 



Magnified Roots and Soil 201 



Peach Tree Five Months Old, Pomeroy Farm 207 



Peach Tree 17 Months After setting 210 



White Elm 17 Months After Planting 215 



Thinning Sugar Beets 218 



Forty Acre Beet Field 219 



Modern Beet Sugar Factory 221 



Sugar Beets in North Dakota by Campbell Method 223 



J. Sterling Morton, Father of Arbor Day 242 



A Prairie Park, Arbor Lodge 243 



Arbor Lodge, Home o? Secretary Morton 244 



Arbor Lodge Trees. 245 



Soil Mulch and Dust Blanket Before Rain. 248 



Soil Mulch and Dust Blanket After Rain 249 



Sorghum by Thorough Cultivation 257 



Growth and Stooling of Grain 267 



