568 



INDEX. 



PACK 



Black prairie soils 53 



Black soils and lands 283 



Blizzards in continental America 298 



Blown-out lands 9 



Blue tint in clays and subsoils 45 



Bodengare T 49. 15, 281 



Bog ore, formation of, in subsoils 46, 66 



Bones, composition of 64 



Bone meal, efficacy of. ... 65 



Borax, borate of soda 79 



Bottom water 227 



rise of, from irrigation 227, 230 



Bottoms, first and second, contrast between 506, 507, 509 



Bottoms, first, tree growth of 57. 59 



Brahmaputra alluvium, Assam 413 



Brown iron ore 44 



" Buckshot " soils of Yazoo bottom 1 16 



" Bunch grasses " as alkali-resistants 471 



Burning-out of humus, effects of 1 18 



Burrowing animals, work in soil-formation 160 



C. 



Calcareous clay, crumbling on drying 116 



formations, predominance in Europe 525 



soils, definition of 367, 496, 524 



solubility of alumina and silica in 389 



subsoils, and hardpans 162 



Calciphile, calcifuge and silicophile plants 521 



Calcite, calcareous spar . 39 



recognition of 39 



Caliche, in Chile, Nevada, and California 66, 67 



Capillarity 189 



Capillary water, reserve of 229 



rise of 202 to 207 



Carbonated water, action on feldspar 32 



action on silicates. . . 18 



universal solvent 17 



Carbonate of soda 77 



injury to soils and plants 78 



Carbonates, chlorids and sulfates of earths and alkalies, reactions 



between 449. 45 



Carbonic acid ! 7 



secreted by roots 20 



Carbonic dioxid, absorption of, by soils 274 



heavily absorbed by ferric and aluminic hydrates. . . . 278 



occurrence, formation 17 



relation to fungous activity 281 



