SUBJECT INDEX 



391 



Nitrogen— Continued. 



in normal diet, minimum, (28) 261. 



parasitic and saprophj-tic plants, (27) 526. 



peat soils, r;j9) lo. 



processed fertilizers, (32) 217; (34) 327. 



protein-free milk, (40) 608. 



rain and snow, (29; 209; (30) 211, 815; (32) 120; 



(38) 416; (40; 724, 809. 

 rain water, (3.5) 620. 

 rain water in .\Iaska, (40) 809. 

 rain water i.n Holland, (26) 614. 

 seeds of Acacia pycnantha, (34) 729. 

 soils as afTectfcd by- 

 alfalfa, (40; 310, 719. 722. 

 cultivation and manuring, (29> 417. 

 digestion, (28; 121. 

 heat. (39) 617. 

 molds, (40) 123, 318. 

 soils, notes, (2%) 316. 

 soils, studies, f28j 120, 814. 

 South African soils, (26) 420. 

 stored soils, (39; 421. 

 volcanic ash, (40) 812. 

 water, relation to plant growth, (39) 332. 

 wheat, studies, (27; 500. 

 increase in fermenting manures, (36) 217. 

 injurious, in sugar beets, (.30) 15; (31) 315. 

 injurious, in sugar cane juice, (30) 15. 

 inorganic and organic, assimilation by plants, 



(26) 32. 



insoluble, availability in fertilizers, (.35) 426. 

 insoluble, in commercial fertilizers, (40) 134. 

 intoxication, seasonal character, (40) 463. 

 lime, see Calcium cyanamid. 

 long-continued use, (34) 128. 

 loss from — 



grass during curing, (32) 111. 



manure, (26) .522; (32; 818. 



manure, prevention, (31) 320. 



peat beds, prevention, (38) 514. 



soils, (27) 321; (28) 217; (29) 227; (35) 812. 

 loss in— 



calcium cyanamid, C27) 824. 



cultivated soils, (33) 809; (34; 516. 



drainage water, (26; 421, 620; (3.3; 122. 



green manuring, (38; 622. 



indastrial wastes, (37) 6-30. 

 lysin, in proteins, (33; 201. 

 metabolic, determination, (37) 672. 

 metabolism — 



during pregnancy, (35) 473. 



during recuperation after fasting, (35) 165. 



during underfeeding, (30) 764. 



in Aspergillus niger, (30; 727. 



in man, (26; 764. 



of, (30; 465. 



bacteria, (39; 110. 

 peas, (37) 24. 

 women, (40) 174. 



on a rice and vegetable diet, (26) 865. 

 methods of manufacture, (40) 25. 

 minimum — 



in fever and during work, (32) 564. 



physiological, studies, (29) 164. 



studies, (26; 764. 

 monopoly in Germany, (33; 624. 

 nitrate, determination in soils and fertilizers, 



(27) 110. 

 nitric- 

 assimilation by green xjlarts, (28) 328. 

 determination in mixed fcitUizers, (27) 610. 

 determination in soil, (38) 111. 



in chernozem soils, (34; 618. 



movement in soils, (26; 616. 



production and movement in soils, (27) 418. 

 nitrous, in irrigated soils, (37) 120. 

 nonprotein — 



determination in blood, (36) 316; (39) 111; 

 (40; 310. 



determination in flour, (38; 614. 



detemiination in milk, (40) 509. 



in blood of children, (35) f>65. 



in normal human blood, (28) 665. 



nutritive value, (26) 665. 



of feeding stufls, (36) 205. 

 nutrition — 



in plants, studies, (29) 628. 



of mold fungi. (32) 327; (36) 527. 



Nitrogen— Continued, 

 organic — 



absorption by millet, (29) 628. 



activity, (27) 206. 



and mineral, separation, (.33; 12. 



availability, (27; 2(;5; (28) .508; (32) 520. 



availability in fertilizers, (33; 13. 



determination of activity, (29) 796. 



determination of solubility, (26; .523. 



effect on action of phosphates, (35; 326. 



in Hawaiian soils, Cil) 11; (32) 721; (33) 621. 



in soils, chemistry of, (26; 320, 615. 



role in ammonia formation, (32; 818. 

 oxidation, (32; 322. 



oxids, determination in atmosphere, (39) 210. 

 oxids, utilization, (40; 815. 

 peat, formation of nitrates from, (29) 624. 

 penetration into plants, (29; 732. 

 pentoxid, determination, (26; 708. 

 permutite, assimilation by pliints, (29; 127, 517. 

 peroxid, effect on flour, (31; 162. 

 problem in dry farming, (28; 322. 

 problem in relation to the war, (40) 25. 

 production in United .States, (37; 721. 

 Products Committee, British, report, (39; 218. 

 protein, determination in soil, (39; 204. 

 protein table for feeding stuffs, (.33; 711. 

 ratio as a criterion of quality in flour, (29; 460. 

 relation to — 



citrus mottle leaf, (37) 3.53. 



fruit-bud formation, (29) 539. 



phosphoric acid in flour, (26) 661. 



sulphur in metabolism, (26) 765. 

 relations of crop plants, (40) 821. 

 removal by corn crop, (37) 232. 

 removal by crops. (.39; 724. 

 removal from soil, (39; 517. 

 residual, in blood before and during absorption 



of food, (29) 767, 768. 

 retention after feeding of urea, (30) 169. 

 retention in pigs, (28) 469, 872. 

 role in plant nutrition, (26; 530; (27) 26. 

 salt?, effect on seeds sensitive to light, (35) 222. 

 soluble, as factor in judging flour, (29; 60. 

 sources in Unif'-i States, (30; 122. 

 sources of, (28; 222. 

 synthetic, stat-xs of industry, (32; 622. 

 total and soluble, in flour, (38) 711, 712. 

 transformation — 



and distribution in citrus soils, (37) 318. 



as affected by calcium carbonate, (20) 226. 



in .\ctinomycetes, '31; 324. 



in moor soils, (34) 18. 



in soils, (26) 721; (31) 818. 



relation to sulfofication, (39) 823. 

 utilization — 



and accumulation, (3.5) 125. 



by crops grown separately and in mixture, 

 (26) 617. 



by legumes, (33) 426. 



by sugar beets, (33; 434. 

 waste and recovery in coal-using industries, 



(28) 221. 

 water-insoluble, in fertilizers, (34) 625. 

 water-soluble, in feeding stuffs, (34) 72, 501. 

 Nitrogenous compounds — 



as affected by organic substances, (27) 626; (33) 



326. 

 a.ssimilation by mold fungi, (33; 726. 

 decomposition in soils, (33; S()8. 

 effect on germination of seeds, (33) 825. 

 effect on legume bacteria, (29) 733. 

 in soils, solubility, (29) 108. 

 inorganic, assimilation by plants, (31) 223. 

 nonprotein, effect on nitrogen intake in pigs, 



(30) 871. 

 organic, as affected by manganese oxid, (27) 726. 

 selection by Aspergillus, (33; 824. 

 Nitrogenous constituents of — 



honey, determination, (26) 207. 

 leaves, displacement by water, (29) 218. 

 lime juice, (29) 161. 

 meat extracts, changes in, (26) 356. 

 urine, studies, (26) 161. 

 Nitrogenous fertilizer — 

 Rehmsdorfer, (40) 320. 

 situation in United States, (39) 120. 

 Nitrogenous fertilizers- 

 action as affected by distribution in soils, (35) 

 518. 



