INDEX OF SUBJECTS. 



881 



rage. 

 Nitrate, phosphate, and potash, ratios for 



plant growth • 024 



Nitrates — 



detection in presence of oxidizing sub- 

 stances 213 



determination 018 



effect on water requirements of crops 331 



fertilizing value 225 



manufacture from the air 525 



reaction for 303 



soil, effect on trees, Colo 221 



seasonal changes in, U.S.D.A 122 



Nitric acid — 



effect on activity of invertase, U.S.D.A.. 110 



alkali soils 622 



yield of crops 023 



electrolysis 009 



in rain 220 



manufacture from the air 323 



reaction for 303 



separating nitrous acid from 705 



soil, solubility 301 



Nitrification — 



in soils 19, 021 



and solutions 721 



as affected by lime and magnesia. 023 



seasonal, U.S.D.A 122 



stable manure 124 



Nitrite, fertilizing value 225 



Nitrites, absorption lay plants 724 



effect on medicinal substances 007 



in flour, examination for 567 



Nitro-bacterine, tests 132, 320, 024, 032 



cultures, tests 131 



Nitrogen — 



absorption in the intestines, studies 374 



aluminum, as a fertilizer 525 



amino, determination 303 



ammoniacal, determination in meat 214 



as ammonia, determination 705 



assimilation by crops 524 



atmospheric fixation 30, 127, 525 



by Azotobacter 19 



bacteria 122 



U.S.D.A 121 



electricity 323 



in soils 429 



utilization 23, 718 



availability, experiments 718 



in fertilizers 302 



various substances 625 



available, cost 323 



carbon, and phosphorus, ratio in soils. 111. 423 



cyanamid, natural changes in 323 



determination 213, 013 



in feces 615 



feeding stuffs 615 



distribution in woman's milk 511 



effect on keeping quality of meat 166 



extraction from vinasse 128 



fertilizing value 32, 224, 630, 040 



N.Y.Comell 138 



P.R 238 



fillers, inert, detection 706 



fixation, determination 705 



in soils 430,622 



Page. 

 Nitrogen— Continued. 



fixation, in soils, Colo 221,523 



investigations 122 



Wis 721 



r61e of bacteria in 717 



free extract, definition, U.S.D.A 672 



in foods and feeds 110 



in foods, biological value 68 



Oregon soils 315 



rain and snow 220 



tree nodules and rootlets 330 



industry, notes 127 



injurious, determination in sugar beets. . 514 



metabolism, Iowa 284 



as affected by lecithin 470 



muscular 



work 470 



in dogs 171 



man 171 



minimum requirements 08 



nitrate, as ammonia, determination 706 



effect on soil bacteria 231 



nitric, assimilation by plants 329 



determination 705 



in soils, studies. Pa 522 



organic, methods of detennining avail- 

 ability 9, 705 



oxid, effect on flour, U.S.D.A 408 



prevention of losses from manure 024 



problem in dry farming 318 



relation to quality in sugar beets 514 



resorption in the intestines 570 



value in agriculture 18 



Nitrogenous — 

 fertilizers — 



comparison 126, 



127, 225, 2.35,525, 532, 633, 638 



P.R 238 



effect on apples. Pa 341 



plants 224 



for tomatoes 241 



new, manufacture and use 626 



solubility 302 



materials, ammonifioation and nitrifica- 

 tion 622 



organic substances, absorption by plants. 725 

 Nitrous- 

 acid, production in water distillation 225 



separation from nitric acid 705 



gases, condensation of atmospheric mois- 

 ture by 616 



oxid, formation and use by bacteria 30 



NiUschia ladfrons n.sp., description 362 



Noctua cxTulcoccphala, notes 756 



Nonagria uniformis, notes 459 



Nonbacterial diseases, immunity in 100 



Nonnitrogenous extracts in feeding stuffs Oil 



Nonprotein compounds, effect on gain in body 



protein 474 



Nonsugaiw, effect on determination of sugar 



In l>eets 307 



North Carolina College, notes 199,298,497 



Station, notes 199,298,497 



Dakota College, notes 298, 598 



Station, report 799 



Pole region, meteorological coadltlons. 616 



