PAGE 



Alfalfa 610 



Beans 610 



Corn 615 



Potatoes 623 



Small grains 624 



Summary of Sulphur Spring Valley Dry-farm data 641 



Sorghums 628 



]\liscellaneijus crops 638 



ILLUSTRATIONS 



PAGE 



Reid's Yellow Dent corn. Prescott Ury-farm Frontispiece 



Scene in tlie Petrified Forest, Northern Arizona 501 



Scene in the Petrified Forest, Xorthorn .Arizona 501 



Amount and distribution of precipitation 510 



Amount and distribution of precipitation 511 



Amount and distribution of precipitation 512 



Amount and distribution of precipitation 513 



Ranch in open park in Northern Arizona forest 515 



San Simi:n Wash near Solomonville, Arizona 528 



Papago rioodwater ditch. Pima County, .\rizona 531 



Papago well, showing' method of raising water 531 



Chemue\ i Indian field subject to annual inundation 534 



Yuma Indian field of corn and beans 534 



.Apache village and farms. Northern Arizona 536 



Wash on the Snowflake Dry-farm, showing uniformity of soil 541 



Dent corn and beans. Snowflake Dry-farm 544 



Corn, Snowflake Dry-farm. 1911 548 



White Dent corn, Snowflake Drv-farm. August 17. 1912 549 



Corn, Snowflake Dry-farm, June 22, 1915 549 



Potatoes a<id oats, Flagstaff, Arizona 555 



Potatoes and corn. Flagstaff. Arizona 555 



Turkey Red wheat, Snowflake Dry-farm 558 



Winter wheat. Snowflake Dry-farm 558 



Spring wlieat and oats, Snowflake Dry- farm 559 



Spring planted oats, Snowflake Dry-farm 559 



Three-year-old dry-farm orchard, Pinedale. Arizona 567 



Beans, Prescott Dry-farm 572 



Papago Sweet corn, Prescott Dry-farm 576 



Potatoes damaged by potato stem borer, Prescott Dry-farm 585 



California Club wheat and Koffoid, Prescott Dry-farm 58"? 



Alarquis w^eat and winter killed barley, Prescott Dry-farm 588 



Winter rye, Prescott Dry-farm 596 



Club-top on bottom land, Prescott Dry-farm 597 



Sumac on bottom land, Prescott Dry-farm 599 



Feterita on bottom land, Prescott Dry-farm 599 



Dwarf milo, Sudan grass, and Sumac on bottom land, Prescott 



Dry-farm " 601 



Broom corn, Prescott Dry-farm 603 



Dry-farmed milo, melons, and beans, near Cochise, Arizona 612 



Bean harvester in use on Sulphur Spring Valley Dry-farm 614 



Dwarf milo, grown near Cochise, Arizona 629 



Shallu, grown near Cochise, Arizona 629 



Feterita, Sulphur Spring Valley Dry-farm 632 



Club-top, Sulphur Spring Valley Dry-farm 632 



Dry-farmed Kafir, planted thinly 636 



Dry-farmed Kafir, planted too thickly 636 



Dry-farmed late cowpeas, grown near Cochise, Arizona 641 



