540 



EXPERIMENT STATION EECOED 



Soils— Continued. 



effect on— continued. 



quality of wine, (20) 813. 



root crops, (29) .577. 



root development, (26) 328. 



Toses, (28) 342. 



sal seedlings, (32) 144. 



strawberries, (31) 534. 



substances in suspension and in solution, 



(29) 19. 

 vegetation, (29) 513. 

 wheat, (29) 835. 



ether and chloroform extracts of, (29) 801. 

 evaporation — 



and run-off, (40) 810. 



of ammonia from (30) 425. 



of water from, (28) 622, 812; (29) 125, 211; 



(30) 321; (31) 25; (32) 815; (36) 421. 

 under arid conditions, (26) 220. 



evapo-transpiration ratio, (39) 517. 

 exchange of bases in, (28) 517. 

 exchange reactions in, (33) 119. 

 fallow, nitrification in, (28) 417. 

 fallowing experiments, (28) 321. 

 Fargo clay loam, (27) 512. 

 fermentation of mannite by, (34) 813. 

 ferriflcation in, (36) 813. 

 ferro-index, (40) 214. 

 ferrous iron in, (30) 719. 

 ferruginous — 



fixation of phosphates in, (30) 722. 

 relation to grape chlorosis, (26) 245. 

 fertilizer requirements, (26) 422; (27) 216; (29) 

 521; (31) 94, 217, 218; (33) 212, 213, 214, 215; 

 (34) 22, 512, 516, 620, 820; (35) 121. 

 fertilizer requirements and chemical and 

 mineralogical composition, relation, (31) 621. 

 fertilizer requirements, determination, (30) 119; 



(31) 217; (32) 620; (33) 22, 817; (35) 215. 

 fijxation of fertilizers by, (32) 721. 

 flocculation in, (36) 21. 

 forest— 



absorption of phosphoric acid by, (28) 421. 



absorption of rainfall by, (31) 516. 



and cultivated, evaporation from, (37) 418. 



animal organisms in, (26) 223. 



as afiected by silvicultural practices, (29) 



343 

 bacteria in, (29) 325; (31) 521. 

 composition, (38) 722. 

 formation, (28) 421. 

 nitrate formation in, (30) 624. 

 nitrification in, (40) 418. 

 nitrogen in, (33) 720. 

 of Germany, productiveness, (30) 514. 

 plant food requirements, (26) 744. 

 properties of, (33) 719. 

 review of literature, (35) 720. 

 soluble salt content, (35) 512. 

 studies, (30) 515. 

 treatise, (26) 338. 

 formation, (30) 513; (31) 719; (34) 619. 

 formation and properties, (34) 326. 

 freezing and thawing, (39) 125. 

 freezing-point lowering, (39) 11, 18, 323. 

 from crvstalline rocks, studies, (27) 415. 

 frozen, bacteria in, (26) 520, 816; (27) 720; (32) 



33; (33) 720; (35) 723; (36) 220; (40) 513. 

 frozen, dynamic processes in, (33) 421. 

 fruit, of Pennsylvania, (28) 143. 

 fumigation, (32) 245, 246; (38) 457. 

 fungus flora, (27) 728; (28) 524; (37) 718. 

 glacial, of Indiana, (29) 815. 

 Qola's osmotic theory, (33) 321. 

 grain-producing power, (32) 827. 

 granitic — 



and gneiss, of the Corso, (40) 316. 

 of New Hampshire, (32) 126. 

 phosphorus in, (37) 522. 

 granulation, (28) 537. 

 graphite, effect on plants, (29) 19. 

 greenhouse — , , „, ,„,. 



partial sterUization, (26) 815; (27) 621; (31) 



336. 

 "sickness" in, (28) 119. 

 summer treatment, (33) 42. 

 temperature and moisture studies, (32) 535. 

 grinding, effect on microorganisms, (36) 116. 

 ground limestone for, (33) 220. 

 gumbo, analyses, (32) 212. 



Soils — Continued . 



gumbo, drainage, (26) 892. 

 gumbo, water penetration in, (36) 210. 

 gummosis affected, (39) 56. 

 Hagerstown clay, (27) 319. 

 Hagerstown loam, (27) 512. 

 handbook, (28) 619; (29) 193. 

 hardpan, drainage, (26) 892. 

 heat conductivity, (27) 215. 

 heated- 

 biochemical studies, (27) 620. 

 changes in, (30) 123. 

 effect on plant growth, (31) 216. 

 germination of seeds in, (26) 640. 

 studies, (26) 815. 

 high moor and mineral, mLxing, (28) 717. 

 highland, acidity in, (28) 813; (29) 816. 

 Houston black clay, (27) 512. 

 Houston clay, (26) 517. 

 humid— 



and arid, nitrifymg powers, (36) 119. 

 excess of soluble salts in, (38) 418. 

 magnesium carbonate in, (31) 815. 

 humus— 



as affected by fertUizers, (28) 520. 

 colloids of, (3.5) 319. 

 content, chlorin index, (40) 619. 

 content, determination, (26) 406. 

 extracted, productiveness, (34) 516. 

 of Java and Malay Peninsula, (34) 811. 

 substances of, (28) 518. 

 hydrogen-ion concentration, (38) 620. 

 hydrogen-ion concentration — 



as affected by fertilizers, (39) 424. 

 determination, (34) 504. 

 hydrolysis and oxidation of salts in, (39) 522. 

 hydrolytic ratio, (38) 511. 

 hygroscopic coefficient, determination, (29) 724; 



(35) 812; (36) 320; (38) 210. 

 hygroscopic moisture of, (26) 218. 

 hygroscopicity, (26) 220; (27) 110, 120; (30) 215; 



(31) 16. 

 impervious clay, reclamation, (33) 430. 

 imperviousness, effect on plant gi'owth, (27) 500; 



(28) 29. 

 improvement, (28) 30; (29) 820; (31) 421; (37) 813. 

 improvement — 



by timber, (26) 140. 

 relation to cattle feeding, (26) 873. 

 treatise, (28) 622, 632. 

 Increase of plant food in, (30) 517. 

 increasing organic matter in, (29) 540. 

 Indian alluvium, nitrification as affected by 



potsherds, (40) 24. 

 indigo, of Bihar, (40) 620. 

 infertile, cause, (27) 819. 

 inoculated, tests, (26) 521. 

 inoculating alfalfa with, (29) 332. 

 inoculation — 



experiments, (32) 818; (39) 116. 



methods, (26) 372. 



natural, notes, (26) 723. 



notes, (27) 322; (28) 197; (29) 417; (32) 320,. 



399 

 preparations, tests, (28) 426; (30) 718. 

 review, (27) 128; (34) 218. 

 status of, (26) 520. 

 under lime deficiency, (29) 820. 

 with Azotobacter, (40) 617, 832. 

 inoculum, "all crops," (39) 519. 

 inorganic composition, (31) 719. 

 inorganic phosphates, (27) 21. 

 insect fauna of, (30) 154. 

 interior surfaces, (39) 215. 

 iron in, studies, (40) 726. 



imgated-^^^ (27) 686; (29) 684; (31) 684; (37) 

 186. 

 evaporation from, (27) 121. 

 management, (33) 827. 

 movement of water in, (27) 819. 

 nitrates in, (37) 120. _ 



ludging, (28) 420; (30) 119, 123, 124, 213. 6^;. 

 (31) 616; (32) 321; (33) 97; (35) 721; (36) 322. 

 Karroo, analyses, (26) 469. 

 Karroo, of South Africa, (31) 418. 

 laboratory manual, (29) 598; (34) 693. 

 laboratory work in, (35) 93. . ,. .. . 



lateral percolation of contaminating liquias m^. 

 (31) 216. 



