INDEX OF SUBJECTS. 



887 



Soil surfaces, determination 521 



surveying, papers on 299 



surveys in Indiana 520 



valuation, studies 617 



waters, studies 316 



Soils, absorption of acids in 131 



adaptation of plants to 141 



air pressure on, studies 130 



alkali, analyses 20 



as affected by gypsum 227 



of Hungary, irrigation 31S 



the Nira VaUey 520 



reclamation 525 



Utah 790 



studies and bibliography, Tex. . 130 



analyses 19, 21, 244, 5lfi, 540 



Can 712 



Idaho 617 



Mo : 129,130 



Nebr 130 



S.C 712,799 



arsenic in 409 



as affected by bacterial flora 529 



forestation 424 



heat 420 



pasturage 541 



availability of potash in 197 



bacterial activity Ln, measuring 327 



barium content, studies, U.S.D.A 21 



bibliography 420, 596 



biochemistry of 430 



black, of Morocco, investigations 316 



blowing, prevention, U.S.D.A 221 



chemistry, physics, and biology 20 



chernozem, fertilizer requirements 22, 714 



Chinese tea, examination 520 



classification 190, 220, 299, 316 



Vt 419 



clover sick, treatment 326 



colloid substances in 21, 219, 299 



condensation of water vapor in 620 



conservation of 132, 290, 448, 615 



cultivated, nitrogen gain and loss in. . . 140 



role of mica in 620 



decomposition processes in 196 



effect on distribution of insects 98 



peptone decomposition 717 



electric conductivity of 20, 521 



elementary lessons on 594, 797 



Cal 493 



evaporation from 318 



examination. Mass 228 



exchange of bases in 131 



fallow, bacteriological investigations. . . 320 



fertilizer requirements, Kans 135 



fixation of bases and phosphorus in 397 



frozen , bacterial content 529 



garden, Azotobacter in 28 



geological formations in, importance. . . 315 



granulation 196 



heated, studies 301 , 421 



heavy, fertilizer requirements 713 



impermeability , studies 620 



improvement. 111 92 



knowledge of, importance 321 



laterite, formation 619 



lawn, invfstigations, U.S.D.A 712 



Page. 



Soils, limed, increase of nitrates in 620 



management 196 



mechanical analyses 218, 219, 220 



methods of analysis 20, 220, 299, 419. 610 



reclaiming, U.S.D.A 488 



micro-organisms in 385 



moor, Azotobacter in 29 



muck, analyses, S.C 799 



nitrification in 303,319 



nitrifying energy of 222, 318 



nitrogen content — 



as affected by electricity 332 



fertilizers, Fla 319 



green manures 36 



nonleguminous plants 710 



studies 22 



nitrogen economy of 21 



transformation in 222 



Norrbotten marsh, investigations 525 



of Atbaser District, studies 619 



Austria and Saxony, studies 315 



Belgium, fertilizer requirements 526 



British Guiana, deterioration 420 



studies 316 



Campinas, Brazil, analyses 618 



Deli, analyses 713 



Denmark, lime requirements 527 



East Afi-ica, analyses 221 



Egypt, studies 221, 299 



Florida, classification 420 



Germany, analyses 315 



Hawaii, studies and bibliography, 



Hawaii 224 



Imperial Valley, notes, Cal 5.35 



Java, studies 316, 419 



New South Wales, notes 420, 618, 619 



northern Wisconsin, Wis 191 



Rio Grande Valley, U.S.D.A 488 



Russia, notes 221 



southern Arizona, Ariz 18 



southwest Africa, analyses 618 



Sweden , types 299 



Tamana, analyses 618 



the Ozark region, Mo 129 



Upper Burnett, analyses 520 



western Canada, analyses 713 



organic compounds in 524 



con.stituents, editorial on 206 



matter in, studies, Tex 302 



of,U.S.D.A 301 



oxidation in, as affected by salts, 



U.S.D.A 223 



peat, Azotobacter in 621 



improvement 320 



permeability, apparatus for determin- 

 ing 522 



phosphoric acid in, studies 131, 423 



pineapple, management, Hawaii 621 



reaction and acidity 397 



relation to growth of pines 244 



vegetation 221 



review of literature 418 



role of nutrient salts in 220 



sandy, as affected by humus silicic 



acid 426 



methods of improving 621 



shallow V. deep cultivation 318 



