350 



Inde> 



Cyanamidc ck-coiiipositioii, 119, 171 



effect of, 183 

 Cystine, 232 



Cytophaga, 39, 76, 112, 115, 344 

 Cyt. huicJiinsoni, 77 

 Cyt. hitea, 76 

 Cyt. myxococcoides, 77 



Damping off, 291 

 Deaiiiinization, 167 

 Decarboxylation, 167 

 Decay, 15, 16 



Decomposition, of organic matter, 3, 

 15, 16, 37, 53, 101 



of plant and animal residues, 95- 

 123 



of stable manures, 52 

 Dematium, 278 

 Denitrification, 183-189 

 Denitrifying bacteria, 71, 187-188 

 Depth of soil, effect of, 34 

 "Destruction," 121 

 Deuterophoma, 278 

 Dicyanodiamide, decomposition of, 171 

 Dimastigamoeha, 92 

 Diplococcus pneumoniae, 193 

 Direct examination of soil, 44 

 Disease-producing microorganisms, 2, 



282-302 

 Distribution of microorganisms, 34 

 Domestication of microorganisms, 



323 

 Dry-land farming, 140 

 Duff, 136 



Earthworms, 37, 45, 56 



in soil, 15 

 Eberthella typhi, 268 

 E. typhosa, 283 

 Ecologic factors, 48 

 Ecologic relationships, 264 

 Ecological phase, 24 

 Ectotrophic mycorrhiza, 86—87 

 Electi\'e culture methods, 31, 32, 50 

 Endotrophic mycorrhiza, 87 

 Enzymes, production of, 274 

 Equilibrium of microorganisms, 41, 



270-272, 335 

 Eremycausis, 1 



Escherichia culi, 52, 268, 275, 283, 



284 

 Eubacteriales, 60 

 Excretion of nitrogen, 224—226 

 Exhaustion of nutrients, 271 



Fatigue of soil, 224 



Fatty substances, decomposition of, 



122 

 Fermentation, 4, 8, 10, 16 

 Fertility of soil and humus, 139 



and microorganisms, 323 

 Fertilization, effect of, 38-39, 332 

 Fertilizers for soil treatment, 292 

 Filterable organisms, 37 

 Fimicolous fungi, 83 

 Fixation of nitrogen, sec Nitrogen 



fixation 

 Flagellata, 90 

 Flagellates, 92 



in soil, 55, 56 

 Food stuffs, microbiology of, 2 

 Forest humus, 135-137 

 Forked mycorrhiza, 87 

 Formaldehyde, 299 

 Foundation of soil microbiology, 10 

 Fungi, and soil aggregation, 327, 328- 

 330 



distribution of, 54 



in soil, 35, 39, 53, 55, 82-88 

 Fungi Imperfecti, 54, 287, 341 

 Fungicides, 300 

 Fusarium, 38, 83, 86, 243, 278, 291, 



292, 293, 328 

 F. lateritium, 278 

 F. lini, 287, 293, 295 

 F. radicicola, 288 

 F. vasinfectum, 287 

 Fusarium wilt, 301 



Gases, 29 



Gelatin plate method, 12 

 General microbiologx-, 26 

 Geophilic fungi, 83 

 Gilbert, Sir Henry, 5 

 Gliocladium, 278 

 Glucose, effect of, 174 

 GranuJohacter, 192 

 Grass, effect on trees, 258 



