INDEX. 



i'age. 



Africa, North, alfalfa cultivation 29 



Alfalfa area, Utah, 1899 : H 



cultivation. North Africa 29 



drought-resit^tant varieties, necessity of breeding 27 



planting in rows for intertilled crop 30 



seed production "9 



quantity to acre, humid and seniiarid regions 30-31 



tillage in dry farming 29-30 



Arid lands, booms, notes 8 



Utah, experiment farms l"! 



Artemisia iride)itat<i, occurrence. Great Basin area 10 



Bacteria, soil, nitrogen-fixing 32, 34 



Bear Kiver Valley, dry farming 13 



Cache Valley, Utah, private expf riments in dry farming 13 



Cedars, occurrence. Great Basin area H 



Chrysothamnus, occurrence. Great Basin area 10 



Corn area, Utah, 1899 H 



Cottonwoods, occurrence. Great Basin area H 



Covin Id Irklentaia, occurrence. Great Basin area H 



Creosote bush, occurrence. Great Basin area H 



Crop areas, Utah, 1899 11 



production, necessity of organic matter in soil 3.! 



rotation, necessity of intertilled crops in dry farming V2,\i 



Crops, dry farming - ( -31 



intertilled, advantages for preserving soil moisture 12, 17 



Deseret, Utah, precipitation, comparison 21, 23 



Disk plow, use in dry farming 2o 



Dry farming, beginning 



development, conditions promotive ' -9 



experiments. Great Basin 11-15 



local conditions I0--I 



pioneer attempts " ' '^ 



regions, three principal, west of Rocky Mountains 9 



supplementary to irrigation 35-36 



Dry lands, home making ^^ ''^ 



Durum wheats, experiments in dry farming - ' 



Dust mulch, usefulness in dry farming 25 



Experiment farms,. arid, Utah 



Experiments, dry farming, in Great Basin 11-15 



Fallow, summer, beneficial effects on nitrification 33 



method in dry farming 24 



Farms, arid, experiment, Utah I"' 



103 -41 



