INDEX 



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cx)mplete, effect on ash content of spinach . . 13-25 

 hydrocyanic, in Andropogon sorghum .... 175-181 

 hypochlorous, effect on germination of 



Irish potatoes 298 



phosphate, effect on — 



ash content of spinach 15-25 



nitrification of acid soils 27-42 



prussic, in Andropogon sorghum 175-181 



Acid soils, effect of lime, fertilizer, crops, and 

 manure on nitrification 27-42 



Acidity in wheat, determination with the 

 hydrogen electrode 1-13 



Actinomycetes in manured soil 318-322 



Adelocera sp., natural enemy of Chrysobothris 

 tranqueharica 161 



Aerobic bacteria, effect of lime, fertilizer, and 

 crops on number in acid soils 33-42 



Age- 

 effect on butter-fat content of cow's milk. , 85-102 

 of host, effect on morphology of uredinio- 



spores of Puccinia graminis 73-77 



of rust fungus, effect on morphology of 

 urediniospores of Puccinia graminis 74-77 



A gropyron — 



smiihii, host of Puccinia graminis tritici. . . . 52-77 

 tenerum, host of Puccinia graminis tritici. . . 52-77 



A grostis alba, host of Puccinia graminis agrostis 63-77 



Alfalfa. See Medicago sativa. 



Alopecurns pratensis, host of — 



Puccinia graminis agrostis 63-77 



Puccinia graminis avenae 58-77 



Alway, Frederick J., and Neller, Joseph R. 

 (paper): A Field Study of the Influence of 

 Organic Matter upon the Water-Holding 

 Capacity of a Silt-Loam Soil 263-278 



Amaranthus retroflexus, host of Pegomyia 

 calyptrata 230 



Amino nitrogen in wheat, method for deter- 

 mining 7-13 



Ammonification of Manure in Soil (paper). . 313-350 



Ammonium — 

 nitrate, effect on nitrification of acid soils. . 27-42 

 phosphate, effect on nitrification of acid 



soils 27-42 



sulphate, effect on nitrification of acid soils. 27-42 



Anaerobic bacteria, effect of lime, fertilizer, 

 and crops on number in acid soils 33-42 



Andropogon sorghum, cyanogenesis 1 75-181 



Anemia, relation to Ascaris infection 253-258 



Angular-leafspot. See Bacterium angulatum. 



Angular-Leafspot of Tobacco, an Undescribed 

 Bacterial Disease (paper) 219-22S 



Anthomyids, leaf-miners on dock 229-244 



Apple-Scald (paper) 195-217 



Apple-scald — 



cause 216 



effect of — 



carbon dioxid 202-203 



delayed storage 213-214 



gas absorbents 214-216 



Apple-scald — Continued, 

 effect of — Continued. Page 



humidity 200-201 



intermittent aeration 206-209 



oxygen 203-204 



temperature 199-200 



ventilation 205-206, 212-213 



A scaris — 



conocephala, action in intestines 256 



lumhricoides. blood-destroying substance 



in 253-258 



Ash Absorption by Spinach from Concen- 

 trated Soil Solutions (paper) 15-25 



Ash in corn grown with barium and strontium 



compounds 192 



Atanycolus — 

 labena, natural enemy of Chrysobothris tran- 

 queharica 161 



rugosiventris, natural enemy of Chrysobothris 



tranqueharica . . . 161 



A triplex patula, host of Pegomyia calyptrata . . 230 

 Australian pine. See Casuarina equiseti folia. 

 Avena sativa — 



host of Puccinia graminis 43-77 



tolerance of barium and strontium com- 



compounds 185-187 



Bacillus — 

 caudatus. See Pseudomonas caudatus. 

 cereus, growth in sterilized manured soil . . 322-325 

 fluorescens — 



liquefaciens. See Pseudomonas fluores- 

 cens. 

 liquefaciens minutissimus. See Pseudomo- 

 nas fluorescens. 

 nonliquefaciens. See Pseudomonas putida. 

 putidus. See Pseudomonas putida. 



maculicola, cause of tobacco v/hitespot 224 



megatherium, relation to ammonification of 



soil 315 



mycoides, re\a.X.ionto ammonification of soils 315 

 pyocyaneum. See Pseudomonas fluorescens . 

 subtilis, relation to ammonification of soils . 315 

 vulgatus, relation to ammonification of soils. 31s 

 Bacteria — 



nitrogen-fixing, effect of salts 107-135 



niunber of fluorescent in soil 337-338 



spore-forming and non-spore-forming in 



freshly manured soil 3 18-322 



Bacterial contents of acid soils as affected by 



lime, fertilizer, crops, and moisture 27-42 



Bacterium — 

 angulatum, n. sp. — 



cultural characters 226-227 



description of — 



organism 226-227 



spots 221-222 



inoculation experiments 222-224 



resemblance to — 



blackrust 224 



wildfire 224 



whitespot 224 



temperature relations 226 



(35x) 



