INDEX OF SUBJECTS 



879 



Freezing of soil, influence of on bac- 

 terial activities, 777 

 Frozen soil, numbers of bacteria in, 32 

 Fulvic acid, 698 



Fumaric acid, formation of, by bac- 

 teria, 414 

 decomposition of, 469 

 Fumigants of soil, 362 

 Fungi, activities of fungi in soil, 260 

 ammonia formation by, 266, 493 

 carbon and nitrogen assimilation 



by, 413 

 causing plant diseases, 806 

 cellulose decomposition by, 238, 



260, 263, 443 

 composition of, 379 

 cultivation of, 241 

 decomposing uric acid, 212 

 decomposition of organic matter by, 



708 

 destruction of, by partial steriliza- 

 tion of soil, 757, 763 

 germination of spores and reaction 



of medium, 637 

 influence of reaction on, 237, 239, 



262, 637 

 isolation of, 237, 245 

 media for isolation and cultivation, 



19, 239-244 

 methods of studying soil fungi, 239 

 mycelium of, in soil, 11, 42 

 mycorrhiza fungi, 238 

 nitrogen-fixation by, 105, 238, 270 

 nitrogen utilization by, 267 

 numbers of, in soil, 42-44, 237 

 occurrence of, in soil, 3, 27, 236, 259 

 reduction of nitrates by, 181 

 relation of, to plant diseases, 806 

 spores of, in soil, 42 

 thermophilic, 157 

 Fungi imperfecti, 252, 259 

 Fungus agar medium, 19 



mycelium in soil, 11, 268 

 Furfural as a source of humus, 693 

 Fusarium, 155, 238, 257, 258, 259, 260, 

 264, 265, 278, 443, 444, 763, 807 

 batatatis, 808 

 bullatum, 261 



Fusarium conglulinans, 808, 811 

 hyperoxysporium, 808 

 lint, 803, 808, 811 

 lycopersici, 808, 811, 814, 815 

 martii ver. pisi, 813 

 moniliforme, 808 

 oxysporum, 261, 637, 803, 807 

 radicicola, 244, 779, 803, 806 

 vasinjeclum, 264 



G 



Galactans in the microbial cell, 383 

 Gallionella, 93, 94 



Garden bean, nodule bacteria of, 136 

 Gas illuminating, utilization of, by 



bacteria, 97 

 Gas, indifferent, for air replacement, 171 

 Gases of soil, composition of, 639 



influence of, on nitrate formation, 534 

 Gasteromycetes, 275, 276 

 Gastrodia elata, 284 

 Gastropods in soil, 342, 359 

 Gastrostyla, 336 



Gelatin liquefying bacteria, 14, 151, 153 

 Gelatin media, 16, 291, 306 

 Genista tinctoria, nodule bacteria of, 



136 

 Gentian-violet, inhibitive action of, 



on the growth of aerobic bacteria, 



165 

 Geocentrophora, 345 

 Geomyces, 254 

 Geotrichum, 252 

 Geophilis, 355 

 Geophilomorph, 355 

 Gephyramoeba delicatula, 331 

 Gibberella saubinetii, 637 

 Glaucoma, 335 

 Glenodinium, 335 

 Gliocladium, 253 

 Gloeococcus, 228 

 Gloeocopsa, 226 

 Gloeocystis, 228 

 Glomeris, 355 

 Gluconic acid, 410 

 Glucose, as a reducing agent, 171 

 decomposition of, in soil, 683, 725 



