388 



EXPERIMENT STATION RECORD 



Nitrates-Cont i nued . 



detection in sewage, (32) no. 

 detection in water, (2G) 511. 

 determination, (26) 108, 204; (27) 111, 497; (33) 



501. 

 determination in— 



alkali soils, (31) 206 



presence of chlorids, (3i) 504. 



soils, (28) 610; (29) 010, 797; (31) 516; (34) 



112, 811; (37) 111. 

 water. (26) 110; (28) 19, 509; (37) 506. 

 etTect on— 



SosiUon oTsugar beets, (26) 196; (31) 435. 

 decomposition of sewage, (26) 725 

 development of root tubercles, (35) 634. 

 nitrogen-assimilating bacteria, (38) 724. 

 nodule production, (32) 727; (33) 134; (37) 



133; (39) 338. 

 oat seedlings, (31) 231, 528. 

 quality of sugar beets, (28) 43. 

 e.xtraction from soils, (26) 524. 

 fertilizing value, (30) 326; (39) <26^ 

 flocculating power on clay, (27) 020. 

 formation — 



from peat nitrogen, (29) 624. 

 in acid soils, (36) 22. 



cultivated soils, (26) 319. 

 forest soils, (30) 624. 

 moor .soils, (30) 325. 

 presence of carbohydrates, (34) 127. 

 puddled soils, (31) 127. 

 soil in relation to weeds, (38) 814. 

 soils, (27) 721; (29) 818. 

 soils after freezing, (30) 23. 

 Virginia soils, (30) 516. 

 in acid soil, studies, (40) 620. 

 chernozem soils, (34) 618. 

 Colorado soils, (29) 819; (31) 619. 

 orchard soils, (36) 724. 

 rain and snow, (40) 19. 

 soil, determination, (40) 506. 

 soils, (26) 723; (27) 419. . 

 soils as affected by soil moisture and manure, 

 (36) 816. 

 leaching from pervious soils, (37) 23. 

 leaching in soils in winter, (36) 119. 

 localization in plants, (30) 30. 

 loss from soil, (29) 315. . 



loss from soil as affected by plant residues, (40) 



121. 

 loss from soil as affected by sugars, (40) 122. 

 loss in drainage water, (26) 421. 

 manufacture, (28) 424. 

 manufacture — 



from peat, (31) 321. 



from the air, (27) 420; (28) 818; (33) 25. 

 inefficiency in, (32) 322. 

 movement in soils, (28) 813; (36) 118. . 

 nitrite formation from, in aqueous solution by 



sunlight, (40) 425. 

 origin and distribution in soils, (29) 621. 

 production by Azotobacter, (31) 421. 

 production in Chile, (32) 517. 

 reduction — 



by bacteria, (31) 324. 

 Streptothrix, (27) 621. 

 yeasts and molds, (33) 726. 

 in cultivated soils, (40) 319. 

 Nebraska soils, (29) 734. 

 plant cells, (28) 428. 

 sterilized soils, (31) 121. 

 of, (26) 507. 



without anaerobic conditions, (31) 127. 

 relation to cultural practices and plant growth, 



(37) 813. 

 relation to sodium carbonate formation in soils, 



(28) 719. 

 role in plant nutrition, (26) 625. 

 Schloesing, fertilizing value, (33) 25. 

 synthetic, manufacture by electricity, (38) 122. 

 titration with ferrous sulphate, (34) 203. 

 transformation by soil microorganisms, (38) 723. 

 use in Europe and Egypt, (27) 727. 

 use in United States, (27) 727. 

 utilization by pea seedlings, (27) 730. 

 utilization by plants, (35) 28. 

 Nitribacillus- 



oligotrophus, notes, (32) 523. 

 polytrophus, notes, (32) 523. 



Nitric acid — 



action on aluminum, (35) 802. 

 assimilation by plants, (30) 30, 31. 

 destruction of stumps by, (28) 48o; (31) 92. 

 detection in presence of nitrous acid, (28) 19. 

 detection in watered fruit juices, (27) 411. 

 determination, (27) 609; (32) 115. 

 determination in foods, (29) 809. 

 determination in presence of nitrous acid, (31J 



503. 

 effect on — 



action of maltase, (28) 504. 



bread fermentation, (27) 268. 



plants, (37) 224. 

 in rain water, (31) 812; (33) 617. 

 industry, status, (27) 128, 519. 

 manufacture, (28) 424; (30) 427; (31) 822 _ 

 manufacture from ammonia, (29) 517; (30) i2i. 

 manufacture from the air, (27) 623; (28) 221; 



(29) 822. 



physical and chemical data, (40) 60. . 

 production from synthetic ammonia, (38) 710. 

 synthetic, manufacture and use, (35) 428. 

 toxicity, (28) 662. 

 use on alkali soils, (28) 814. 

 Nitric — 



compounds, inorganic, behavior in sunlight, 



(30) 824. 

 nitrogen- 

 determination, (36) 504. 



in country rock, (22) 28; (36) 423; (37) 518. 

 in soil, influence of salts on, (40) 722. 

 Nitrids industry, status, (27) 128, 519. 

 Nitrification— 



and soil toxins, studies, (38) 322. 

 as affected by — 



alfalfa and timothy, (29) 317. 



alkali salts, (38) 322. 



calcium carbonate, (40) 723. 



carbon, (27) 322. 



carbon dioxid gas, (39) 618. 



carbon disulphid and toluol, (30) 717; (40) 



513. 

 copper salts, (29) 529. 

 crops and fertilizers, (35) 321. 

 ether, (27) 131. 

 ground limestone, (27) 422. 

 gypsum, (20) 527. 

 humus-forming materials, (35) 216. 

 irrigation and crop production, (31) 119. 

 lime-magnesia ratio, (32) 720. 

 liming, (26) 428. 

 manganese, (34) 623; (37) 126. 

 metallic salts, (31) 120. 

 organic substances, (31) 223. 

 partial sterilization, (28) 121. 

 radioactivity, (30) 30. 

 soil moisture, (28) 720; (.36) 513; (40) /19. 

 spray mixtures, (30) 423, 424. 

 straw, (40) 719. 

 sulphur, (31) 125. 

 effect on soil fertility, (35) 21; (37) 519. 

 effect on solubility of tricalcium phosphate, 



(39) 23. 

 factors affecting, (36) 321. 

 in acid humus soils, (30) 424. 

 acid or nonbasic soils, (30) 517. 

 acid soils, (32) 121; (35) 514; (40) 620. 

 arid soils, (29) 21, 211. 

 Colorado soils, (29) 621. 

 cultivated soils, (31) 722. 

 Dunkirk Clay Loam, (26) 434. 

 fallow soils, (28) 417; (31) 722. 

 Hawaii soils, (32) 719. 

 Indian alluvium as affected by potsherds, 



(40) 24. 

 moor soils, (40) 811. 

 natural soils, (40) 418. 

 pasture soils, (30) 399; (31) 516. 

 Philippine soils, (34) 718. 

 plants, (34) 627. 



plants as affected by naphthalin, (33) 523. 

 sandy loam soils, (36) 321. 

 semiarid soils, (36) 422. 

 soils, (26) 721, 722, 723, 816; (31) 318, 420, 

 818; (34) 127, 423, 619; (35) 626; (36) 724; 

 (37) 318; (38) 211. 

 in soils — 



and solutions, (30) 218. 

 nature, (36) 513. 



