888 



EXPERIMENT STATION RECORD. 



Soil inoistiire— Continued. Pago. 



relation to tTop production 124 



plant diseases 245 



tillage, Wash 520 



organisms, review of investigations 317 



productivity as affected by partial sterili- 

 zation 121 



studies, U.S.D. A 18 



requirements of Para rubber 040 



sampler and case, description, Kans 21 



survey in Oklahoma, Okla 798 



South Africa 519 



temperatures— 



as aflected by forest cover 44 



snow 21 



effect on bacterial activity, Kans — 21 



in upland moors 521 



investigations 123 



studies 521 



yields, law of minimum in 223 



Soiling crops, culture, N.J 134 



^^rieties 442 



Soils, alkali, analyses, Can -. 321 



digest of data on .- 522 



investigations 124, 222 



ammonifying powers in 427 



analyses 123, 223, 335, 441, 631, 783 



Can • 321 



Hawaii 20 



U.S.D.A IS 



as affected by bog toxins 22 



calcium carbonate 130 



carbon bisulphid, P. U . . 224- 



availability of potash in, N. H 424 



bacteria in, as affected by cultivation, 



Kans 21 



bacterial activity in, new theory 005 



bacteriological investigations 21, 723 



black, productivity as affected by ma- 

 nure 429 



care and treatment 714 



chalk, moisture investigations 15 



cocoa, restoration of fertility in 123 



composition as affected by green ma- 

 nures 524 



copper in, by spraying 152 



corrosion of iron and steel in 715 



cotton, fertilizers for, U.S.D.A 23 



cultivated, colloid substances in 208 



cultivation in dry regions 23 



decomposition of plants in 318 



destruction of eelworms in, U.S.D.A.. . 798 



dune, variations of ground water in 322 



effect on composition of wheat, 



U.S.D.A 730 



fruits 240 



elementary course in 693 



evaporation from, studies 617 



examination, P.R 224 



fen, fertilizer requirements 322 



fertilizer requirements 224, 337 



forest, fertilizer requirements 713 



nitrification in 521,522 



formation of ammonia in, N.J 120 



granitic, analyses 522 



mineral constituents in 320 



heat conductivity, U.S.D.A 20 



Page. 



Soils, hummock, fertilizing value 719 



improvement 714 



Can 321 



in the vicinity of Berlin, studies 223 



irrigated, nitric nitrogen in, Utah 017 



loess, of Nebraska, analyses, Nebr 422 



loss of nitrogen from .' 125 



management 322 



marsh, analyses 713 



methods of analysis 20 



microtjiological properties 519 



moistening, thermal effects 425 



moor, improvement 710 



in Bavaria, studies 521 



reclamation and use 322 



temperatures in 521 



nitrate-bearing, analyses. 021 



nitrification in 123,221,714.715 



as affected by carbon. . . 221 



studies 318 



nitrifying powers in .' 427 



nitrogen content- 

 as aflected by plants 122 



various factors 222 



of Argentina, studies 522 



Bengal, notes 223 



Bologna, analyses 423 



Brunswick, Ga., studies, U.S.D.A . . 617 



Cape Colony, analyses 20 



origin and composition 19 



Crow's Nest Valley 45 



Illinois, improvement 129 



studies 429 



Natal, analyses 617 



Nebraska, description 222, 396 



New South Wales, analyses 522 



northern Siberia, bacterial content.. 317 

 Pender County, N.C., analyses, 



U.S.D.A 423 



Porto Rico, P.R 222. 295 



Somaliland, analyses 713 



southern Harz region, studies 223 



Taurida, composition 713 



the Kirghiz Steppe, studies 617 



Nile Valley, analyses 713 



Truckee-Carson region, protec- 

 tion, U.S.D.A 35 



Upper Egypt, physical prDperties. . . 321 



partial sterilization, studies 121 



peat, composition 322 



improvement 322 



nitrogenous compounds in 619 



Mich.. 618 



reclamation and use 322 



phosphate content, factors affecting. 



Wis 125 



phosphoric acid in, studies 424, 019 



physical properties, determination 219 



studies, importance 320 



plant food in, maintenance 424, 619 



podzol, effect on phosphates 129 



propagation of wheat smut by 745 



reclamation in Denmark 123 



relation to bacteria 222 



colloid chemistry 411 



review of investigations 317 



