352 



Index 



Manure, decomposition of, 118, 139, 

 152, 30.5-307, 310 



effect of, 38, 48, 113-115, 294 



microorganisms in, 52 



preservation of, 308, 310, 324, 339 

 Mastigophora, 89 

 Medical bacteriology, 2 

 Medical mycology, 2 

 Mercury compounds, use of, 300 

 Merulius lacrymans, 121 

 Methods, 19, 39 



for evaluation of soil fertility, 325 

 Microbial equilibrium, 270-272 

 Microbiological antagonism, 293 

 Microbiological population, 33, 192, 



193 

 Micrococcus denitrificans, 187 

 M. fiavus, 268 



Micromonospora, 35, 81, 82, 344 

 Microorganisms, effect on plants, 



250-254 

 Microscopic methods, 33, 40, 41, 42 

 Microspira desulfuricans, 234 

 Mineral substances, transformation 



of, 230-245 

 Minerals in soil, 29, 164 

 Moisture, effect of, 48, 49, 112, 163, 



291, 309 

 Molybdenum, 230, 242 



effect on nitrogen fixation, 223 

 Monascus, 278 

 Monilia, 86, 278 

 Monosporia, 86 

 Morphology of bacteria, 214 

 Muck, 134 

 Mucor, 83, 278 

 Mulder, J. G., 8 

 Mull soil, 136, 143 

 Mycelium in soil, 36, 40, 44, 45, 54 

 Mycobacterium tuberculosis, 284, 285 

 Mycogone nigra, 115 

 Mycorrhiza, 86-88, 259 

 Mycorrhiza fungi, 38, 86-88, 330 

 Myxobacteria, 71, 77 

 Myxobacteriales, 60 

 Myxococcus, 71, 77 

 Myxomycetes, 287 

 Myxophyceae, 200 



Ndegleri gruberi, 92 



Nematodes, 45, 57, 93, 290, 299 



"Niter plantations," 179 



Nitrate accumulation, 160 



Nitrate assimilation, 185 



Nitrate formation, 104, 137, 139, 171 



Nitrate reduction, 184, 185 



Nitrification, 12-13, 15, 160, 179- 

 183, 235 



Nitrifying bacteria, 61-66 



Nitrite oxidation, 182 



Nitrobacter, 65 



Nitrogen, assimilation by plants, 209 



Nitrogen fixation, 14, 160 



mechanism of, 201-204, 222-223 

 nonsymbiotic, 191-207 

 symbiotic, 14, 208-229 



Nitrogen-fixing bacteria, 60, 184 



Nitrogen-fixing capacity, 19 



Nitrogen liberation, 104 



Nitrogen losses, 140, 141, 188, 189 



Nitrogen transformation in soil, 166- 

 190 



Nitrogenase, 195 



Nitrogenous substances, decomposi- 

 tion of, 117-120 



Nitrosocystis, 65 



Nitrosogloea, 65 



Nitrosomonas, 61, 65, 181 



ZV. europea, 61 



Nitrosospira, 65 



Nocardia, 35, 70, 82 



N. catarrhalis, 268 



N. coraUinus, 70 



Nodule formation, 210-212, 213-214 

 in nonlegumes, 220 



Non-spore-forming bacteria, 69-70 



Nonsymbiotic nitrogen fixation, 191- 

 207 



Nostoc, 199, 200, 220 



N. muscorum, 200 



Nucleic acid, 167 



Nucleobacter, 237 



Nucleoproteins, 237 



Numbers of bacteria, 39, 53 



Oats, decomposition of, 105, 117, 307 



Oicomonas termo, 92 



Oils, decomposition of, 122 



