INDEX OF SUBJECTS 



997 



Soil— Continued. Page. 



colloids, properties 514 



constituents as semipermeable mem- 

 branes 720 



constituents, assimilation by oats 632 



crusts, relation to fertilizers 123 



erosion, economic waste from, U.S.D.A.. 316 



erosion, measurement 24 



erosion, prevention 317 



fertility, determination, Ohio 226 



fertility, investigations 620 



fertility, maintenance 318 



fertility, maintenance, Ky 217 



fertility, maintenance. Mo 819 



fertility, maintenance, Ohio 217 



fertility, new views on 516 



fertility, notes 221 



fertility, notes, Iowa 122,127 



flows in polar and subpolar regions 23 



fungi, studies 127 



granulation products, classification 418 



investigations, methods 514 



management, treatise 719 



micro-organisms, nitrogen requirements. 313 



moisture, conservation 494 



moisture, conservation and use, Nebr 419 



moisture, relation to root systems of 



plants 514, 628 



moisture, review of investigations 522 



organisms, effect of toxic substances on, 



Mo 342 



particles, separation according to specific 



weight 616 



protozoa, studies 26, 420, 516 



salts, relation to cultivated plants 627 



sickness in wheat lands, N.Dak 148 



sickness, treatment 146 



solution as an index to soil fertility 620 



solution, method of obtaining 317 



survey in Arkansas, Ashley Co.,U.S.D.A. 813 



surveyin Florida,BradfordCo.,U.S.D.A. 813 



survey in Georgia, Gordon Co., U.S.D.A.. 814 



survey in Georgia, Miller Co., U.S.D.A. . . 814 



surveys in United States, U.S.D.A 512 



tank experiments, Fla 723 



temperatures as affected by forest cover . . 415 



toxins, formation 620 



Soiling crops for Iowa, Iowa 265 



Soils- 

 absorptive power 514 



acid, of tropical countries 419 



adsorption in 814 



adsorptive power, determination 119 



agricultural adaptations 35, 418 



alkali, improvement 317 



alkali, of Nevada, analyses 215 



alkali, reclamation, U.S.D.A 889 



ammonification in 317,420 



analyses, Nev 24 



analyses as a guide to fertilizer needs 217 



antagonism of salts in 317, 627, 721 



as aflected by aldehydes, U.S.D.A 620 



as affected by climate and weather 214 



as affected by disinfectants 620 



as affected by heating 25, 216, 620 



as affected by lime 220 



barren, studies 819 



80404"— 15 8 



Soils— Continued. Page. 



biological absorption 313 



biological analysis 216 



blowing, management 25 



calcareous, efleet on plants, P. R 627,816 



capillary lift of, measurement 720 



cellulose-destroying power 313 



characterizing according to molecular 



composition of sUicates 22 



chemistry of 615 



circulation of moistair in 26 



clay, as aflected by hydroxyl ions 216 



clay, improvement. Wis 723 



cogon, improvement 38 



colluvial, of Missouri 720 



colored sandstone, of Germany 513 



decalcification by smoke 521 



disinfection with carbon dioxid 248 



dry-farm, nitrogen and humus content. . . 318 



effect on strawberries 534 



evaporation from 25 



fertilizer requirements 94, 218 



fertilizer requirements, Ky 217 



fertilizer requirements and chemical and 



mineralogical composition,relation,N.C. 621 



fertilizer requirements, determination... 217 



forest, absorption of rainfall by 515 



forest, bacteria in 521 



formation and classification 719 



formation of carbon dioxid in 127 



greenhouse, partial sterilization 336 



heated , effect on plant growth 216 



humid, magnesium carbonate in. Term. . 815 



hygroscopicity 16 



improvement 421 



inorganic composition, U.S.D.A 719 



irrigated, drainage 684 



judging 616 



Karroo, of South Africa 418 



lateral percolation of contaminating liq- 

 uids in 216 



lessons on 394 



lime requirements 112,726 



loam, distribution of constituents in 618 



lysimeter investigations 24 



management 318 



methods of analysis 312, 417, 514, 719, 806 



mineralogical analysis 206 



moor, as affected by lime 220 



moor, decomposition of cellulose in 25 



moor, drainage and cultivation 732 



moor, lime requirements 726 



nitrification in 318, 420, 516, 722, 818 



nitrifying power, determination 26 



nitrogen content as aflected by bacteria. . 731 



nitrogen transformation in 722, 818 



nitrogen transformation in, Colo 818 



nitrogen transformation in,Oreg 818 



of Argentina, analyses and description. . . 215 



of Colorado, nitrates in 619 



of German Southwest Africa, analyses ... 620 

 of Hawaii, absorptive power for ferti- 

 lizers, Hawaii 723 



of Hungary, notes 814 



of India, nitrogen content 215 



of Kentucky , manganese content 720 



of Knox County, Illinois, HI 23 



