972 



EXPEEIMENT STATION" RECORD. 



Nitrates— Continued. Page. 



formation from peat nitrogen 624 



in soils, N.Y.Cornell 818 



In Colorado soils 819 



loss from soils 315 



origin and distribution in soils, Colo 621 



Nitric acid, determination in foods 809 



manufacture from ammonia 517 



the air 822 



Nitrification— 



as affected by alfalfa and timothy 317 



in arid soils 21, 211 



Colorado soils, Colo 621 



soils as affected by copper salts 529 



studies, N.C 21 



Virginia soils, Va 621 



Nitrites, assimilation by mold fungi 29 



determination in soils 797 



Nitrogen- 

 ammonia, determination in water 617 



fixation by permutite and clay 



soils 127,517 



utilization in protein meta- 

 bolism 62 



assimilation by AzoUa 133 



fungi 824 



leguminous plants 326 



atmospheric — 



abnormal fixation 819 



fixation 517, 730 



by Azotobacter 227 



boron compounds 822 



feldspar 518 



legume bacteria, Va 629 



treatise and bibliography 417 



utilization 126, 319, 821 



determination 796, 807 



in meat products 800 



soils 317 



urine 508 



effect on carnations and roses 840 



variation of tomatoes and beans, 



Md 339 



fixation by alumina and carbon 417 



barium oxid and charcoal 822 



micro-organisms 819 



plants 133 



zeolites 211 



in Colorado soils, Colo 621 



Nebraska soils 734 



review of literature, U.S.D.A 527 



role of alumina in 24 



in rain and snow. Can 209 



soils as affected by cultivation and ma- 

 nuring 417 



notes and bibliography 316 



lime. (See Calcium cyanamid.) 



loss from soils 227 



minimum, physiological, studies 164 



nutrition in plants, studies 628 



organic, absorption by millet 628 



determination of activity 796 



peat, formation of nitrates from 624 



penetration into plants 732 



permutite, assimilation by plants 127,517 



ratio as a criterion of quality in flour 460 



relation to fruit-bud formation 539 



Nitrogen— Continued. Page, 

 residual, in blood before and during ab- 

 sorption of food 767, 768 



soluble, as a factor in judging flour 60 



Nitrogenous — 



compounds, effect on legume bacteria 733 



in soils, solubility 108 



constituents of leaves, displacement by 



water 218 



lime juice 161 



fertilizers, avaUabUity 126 



comparison 23, 125, 213 



production and use 517 



relation to citrus die-back, Fla . 248 



valuation 821 



products, absorption 465 



soil constituents, effect on plant growth. . 219 



Nitrous acid, detection in ethyl alcohol 312 



Nodular worm, life history and structure 476 



Nolina microcarpa, notes, Ariz 441 



Nonhalophytes, variations in salt content 28 



Norbanuss])., notes 458 



North Carolina College, notes 498, 900 



Station, financial statement. . 95 



report of director 95 



Stations, notes 498 



North Dakota College, notes 196, 700 



Station, notes 700 



Williston substation, report . 299, 496 



Nosema apis, studies 761 



Noxubee County, Miss., soil survey, U.S.D.A. 16 



Nucleic acid, effect on plant growth 219 



Nucleus, role in heredity 66 



Nun moth, dipterous parasites of 759 



Nursery — 



industry in Utah 342 



inspection— 



in Arizona 341 



Canada, Can 252 



Tennessee 653 



Utah 342 



law in Arkansas, Ark 641 



Kentucky, Ky 641 



Missouri, Mo 838 



laws and regulations in United States 



and Canada 746 



practice, notes 838 



stock, fire blight aflectmg, N.Y. Cornell. 348, 551 



fumigation, Ey 640 



transportation law. Ark 641 



Nut industry in California 639 



kernels, extraction, cleaning, and utiliza- 

 tion 660 



Nutrition — 



animal. {See Animal nutrition.) 



coefficient of school children 364 



effect on amylase content of human sa- 

 liva 568 



investigations at Carnegie Institution 270 



mineral elements in, Oliio 862 



plant. {Sec Plant nutrition.) 



problems, discussion 665 



treatise 266 



{See also Digestion, Metabolism, etc.) 



Nuts, insects affecting 354 



soaking 60, 264 



Nysius angustatus, notes 252 



