42 INDEX. 



Page. 



Fertility, soil, maintenance without rotation of crops 31 



Fillmore, Utah, precipitation, comparison 21-23 



Flora, Great Basin area 10-11 



Forage crop area, Utah, 1899 11 



Garden irrigation on dry lands 37 



Grasses, varieties native to Great Basin area 11 



Greasewood, occurrence. Great Basin area 11 



Great Basin, dry-farming experiments 11-15 



location and topography 9-1 1 



rainfall, comparison with Great Plains rainfall 16-18 



Harrow, disk, use in dry-farming 23 



Harrows, drag and brush, use in dry farming 24 



Hay, alfalfa, in dry farming 29 



area, Utah, 1899 11 



Home making on the dry lands, risks 36-38 



Hyd'rographic survey, necessity in Great Basin 37 



Implements used in dry farming 22-24 



Irrigated land, Utah, area 13-14 



Irrigation, excessive, evil results 36 



garden, necessity on dry lands 37 



Jordan River valley, dry farming 13 



Lahontan, Lake, drainage center, note 10 



Law, arid experiment farms, Utah 14 



Levan, Utah, dry farming and location 19 



Logan, Utah, dry farming and location 18, 19 



Malade Valley, dry farming, note 13 



Moisture, soil, methods of retaining 22-27 



necessity of conservation 12, 15 



relation to soil texture 26 



Mulch, dust, to conserve moisture, dry farming 25 



Nevada crops, areas, 1899 - 12 



Nitrification, conditions favoring 33 



-Nitrogen fixation, action of soil bacteria - 34 



Oregon, Great Basin region, note 12 



Oxidation, loss of organic matter from soil, remedy by deep plowing 35 



Parowan, Utah, dry farming and location 19 



Plowing, deep, necessity in dry farming 35 



Plows, kinds used in dry farming 22 



Potatoes, area, Utah, 1899 H 



Precipitation, monthly average at representative points in semiarid West 17, 18 



winter, advantages 16-18 



See also Rainfall. 



Rainfall, annual, Levan, Utah, 1893-1906 19, 21 



Logan, Utah, 1893-1906 19 



Parowan, Utah, 1891-1906 19, 22 



Tooele, Utah, 1897-1906 19, 20 



influence of local topography 20-21 



relation to soil moisture 26 



Richfield, Utah, precipitation, comparison 21, 23 



Rotation, crop, necessity of intertilled crops in dry farming 12, 17 



Sagebrush, implements for removing 24 



occurrence, Great Basin area 10 



S(tn-ubutiis rennicuhitus, occurrence, Great Basin area H 



103 



