INDEX. 



571 



Drainage, rights-of-way for 461 



Drainage waters, use for irrigation 250 



Drain waters, analyses of, table 22 



leaching effects of 271 



Drouth, resistance to, in arid soils 167 



Dust soils, nature of 104 



slow penetration of water in 105 



Dust storms 9 



Dynamite, used for shattering dense substrata 181 



Earth's crust, known thickness xxix 



Earthworms, action of in soil-formation 158 



Ecological studies 314 



Egypt, obelisks of 2 



Elements constituting earth's crust, table of xxix 



important to agriculture, list of xxxi 



Elutriator, Hilgard's, figure 91 



Epsomite, epsom salt, in soil 78 



Eremacausis 1 29 



Erosion in arid regions 219 



in Mississippi table lands ; figures 218 



lowering of land by 15 



of rocks by sand ; figure 10 



Eruptive rocks, basic and acidic 49 



rocks, soils from 52 



Eucalyptus, tolerance of alkali 480 



European observations on plant distribution 519 



standards of plant-food adequacy Maercker's table 369 



Europe, predominance of calcareous formations in 525 



Evaporation and crop yields, calculated 193 



and crop yields, observed ( Fortier) 194 



and plant growth 193 



counteracting, in alkali lands 455 



dependence on air temperature ; Fortier's experiments, 



table 255 



from reservoirs and ditches 257 



from water surfaces 254 



wet and moist soils 254 



in different climates 192, 256 



in different localities, California 255 



restrained by loose surface layer ... 255 



through roots and leaves, amount of 262, 263 



Expansion by oxidation 18 



F, 



Farmyard or stable manure 72 



Feldspars, weathering of 31 



products of 32 



