SUBJECT INDEX 



389 



Nitrification— Continued . 

 in soils — continued. 



statistical study, (39) 815. 

 studies, (27) 517; (28) 814; (29) 21; (33) 421, 

 620. 

 in solutions, (31) 420. 



tilled and untilled fallow, (30) 216. 

 Virginia soils, (29) 621. 

 inhibition by alkali salts, (27) 124. 

 of green manures, (28) 124; (33) 514. 

 of organic compounds in soils, (38) 119. 

 of organic manures, (31) 723. 

 rate of, (32) 123. 

 relation to — 



crop production, (35) 424. 



cultural practices and plant growth, (37) 



813 

 soil fertility, (32) 96. 

 review of investigations, (30) 11. 

 role of Streptothri.\ in, (27) 621. 

 seasonal variation, (32) 514. 

 . studies, (28) 217; (32) 320; (33) 124, 422; (39) 324. 

 Nitrifying organisms — 



as affected by cyanamid and dicyanodiamid, 



(40) 724. 

 media for, (35) 226. 

 studies, (39) 619. 

 Nitrite-forming organism, new, studies, (35) 334. 

 Nitrites — 



accumulation in soils, (37) 19. 



assimilation, (32) 223. 



assimilation by mold fungi, (29) 29. 



assimilation bv plants, (28) 526; (30) 219, 824. 



detection, (26) 108, 506; (33) 804. 



detection in drinking water, (32) 311. 



detection in sewage, (32) 115. 



detection in water, (26) 511. 



determination, (26) 311; (27) 111; (33) 204; (36) 



203; (40) 309, 610. 

 determination in — 



potable waters, (27) 503. 

 presence of nitrous acid, (31) 503. 

 sewage, (26) 407. 

 soils, (29) 797. 

 water, (28) 19. 

 effect on determination of oxygen in water, (31) 



411. 

 formation in aqueous solution by sunlight, (40) 



425. 

 from nitrates by sunlight, (38) 811. 

 in calcium cyanamid, (32) 217. 

 in diseased plants, (37) 549. 

 in plants, (33) 627. 

 localization in plants, (30) 30. 

 manufacture, (28) 424. 

 Nitrobacteriaceae, genera, (39) 828. 

 Nitrobenzene, insecticidal and larvicidal value, 



(34) 359. 

 Nitrobenzol— 



as a parasiticide, (38) 760. 

 determination in peanut oil, (31) 413. 

 Nitrocultures, preparation and use, (36) 827. 

 Nitrogen- 

 absorption and leaching in soils, (36) 219; (37) 23 

 absorption by oats, (31) 632. 

 absorption by soils, (31) 723. 

 absorption by trees, (26) 443. 

 accumulation and utilization, (40) 125. 

 accumulation in continuous rye culture, (30) 



424; (31) 318. 

 action on musts and wine, (36) 801. 

 activity, determination, (27) 496, 499. 

 aliphatic amino, determination, (34) 608. 

 amino— 



and anaphylatoxin, (37) 582. 



and polypeptid, determination in barley, 



malt, and beer, (33) 613. 

 determination, (31) 610; (34) 505, 579; (35) 



201. 

 determination, foam inhibitor, (38) 613. 

 determination in blood, (37) 14, 206; (38) 713. 

 determination in milk, (40) 509. 

 determination in tissues, (31) 808. 

 in lymph and blood, (39) 670. 

 pea seedlings, (33) 222. 

 protein, (33) 201. 

 soils. (34) 515. 

 relation to quality in flour, (37) 206. 



Nitrogen— Continued, 

 ammonia — 



behavior in limed and unlimed soil, (26) 320. 

 determination, (31) 109; (38) 311. 

 determination in urine, (34) 613. 

 determination in water, (29) 617. 

 fixation by permutite and clay soils, (29) 



127, 517. 

 utilization by corn plantlets, (27) 634. 

 utilization in protein metabolism, (29) 62. 

 analysis, apparatus for, (40) 111. 

 and carbon, equilibrium in soils, (38) 421. 

 apparatus, all-glass, (40) 609, 806. 

 as source of muscular energy, (26) 763. 

 assimilating bacteria , studies, (39) 722 

 assimilation — 



as affected by humus, (31) 120. 

 by AzoUa, (29) 133. 



corn, (28) 225; (37) 223. 

 fungi, (29) 824. 



legumes, (29) 326; (30) 435; (31) 523 

 living organisms, (30) 323. 

 mold fungi, (28) 803. 

 plant roots, (27) 634. 

 plants, (26) 617; (27) 226; (32) 121. 

 rice, (26) 41; (38) 340. 

 royal palms, (27) 847. 

 Streptothrix, (27) 620. 

 from nitrates, ammonium salts, and aspara- 



gin, (27) 331. 

 in meadows, (26) 422. 

 plant cells, (28) 428. 

 presence of nitrates, (31) 121. 

 atmospheric, abnormal fixation, (29) 819. 

 atmospheric, assimilation by — 

 alfalfa, (39) 738. 

 mycorrhiza, (30) 826. 

 plant hairs, (32) 327; (33) 30. 

 plants, (31) 223; (35) 435. 

 soil organisms, (32) 29. 

 yeasts and fungi, (30) 629; (32) 728. 

 atmospheric, fixation, (28) 222, 522; (29) 517, 



730; (39) 428. 

 atmospheric, fixation — 



as affected by plant tissues, (39) 26. 

 by aluminum nitrid, (27) 325, 624. 

 Azotobacter, (29) 227. 

 bacteria, (26) 123, 824. 

 boron compounds, (29) 822; (32) 125. 

 electricity, (26) 425, 818; (27) 420; (31) 

 622, 822; (32) 125, 722; (33) 125, 219, 

 326, 517; (35) 219; (36) 122; (38) 122, 

 311, 325, 423, 625; (39) 817. 

 feldspar, (29) 518. 

 fungi, (28) 824. 

 legume bacteria, (29) 629. 

 nonlegume plants, (37) 819. 

 in soils, (38) 213. 

 treatise, (29) 417. 

 atmospheric — 



industrial fixation, (37) 321, 815. 

 utilization, (27) 520, 623; (28) 221, 817; (29) 

 126, 319, 821; (30) 11, 26, 721; (32) 820; (33) 

 25, 424. 

 utilization by higher plants, (33) 627. 

 utilization by radishes, (34) 218. 

 availability — 



experiments, (40) 125. 

 in barnyard manure, (26) 323, 424. 

 bat guano, (27) 8i5. 

 fertilizers, (26) 523; (36) 818. 

 kelp, (33) 206. 



mineral and organic compounds, (34) 621 

 available, cost, (26) 95. 

 bacterial, determination in feces, (26) 161. 

 balance in pot experiments, (27) 21. 

 carbid, fertilizing value, (35) 519. 

 carbon, and humus ratios in soils, (28) 217. 

 combined, in rain, (27) 212. 

 combined, losses of, (IS) 424. 

 compounds — 



availability for higher plants, (30) 324. 

 in growing mustard, (26) 824. 

 in rain and snow, (32) 615. 

 manufacture, (28) 424. 

 manufacture from the air, (27) 824. 

 metabolism in etiolated shoots of barley, 



(35) 434. 

 of fundamental rocks, (32) 121. 

 of soils, (32) 718. 



