Index 



353 



(li.K-liansky, W L., lU 

 0))hi()ho}us\ 278 

 (). fii-aminis. 292, 294 

 Or<ianic-iiu)rganic colloid, 130 

 Organic matter decomposition, 149- 

 163, 175 



effect of, 291, 294 



in soil, 130, 133 

 Organized ferments, 13 

 0\idati\e deaminization, 168 

 Ox>gen, importance of, 244 



Partial sterilization of soil, 74, 255, 



273-274, 297-299 

 Pasteur, L., 2 

 Pathogens in soil, 282 

 Peat, 134-135 



decomposition of, 163 



formation of, 136 

 Peat humus, 314 

 Peat moss, 134 

 Pectin, 115-117 

 Pedological phase, 4 

 Penicilliwn, 23, 38, 54, 83, 84, 86, 



93, 115, 278, 328, 342 

 P. brevicaule, 66, 243 

 P. italicum, 293 

 Peziza, 278 

 P. sclerotiorum, 278 

 P. trifoliorum, 298 

 Phages, 37, 93 

 Phoma betae, 287 

 Ph. radicis, 88 

 Phosphorus, availability of, 252 



transformation of, 235-240 

 Photochemical nitrification, 180 

 Photosynthesis and nitrogen fixation, 



219 

 Phycomycetes, 54, 83, 84, 287, 341 

 Phylloxera, 290 



Phymatotridum omnivorum, 293, 295 

 Phyo-enzymes, 196 

 Physical methods of soil treatment, 



296 

 Physiological groups of bacteria, 51 

 Ph\'siological phase, 4 

 Physiology of nodule bacteria, 218 

 Phytin, 236 

 Phytohormones, 168, 254 



Phyluphthorii, 278, 288 



Ph. bowlesii, 268 



Ph. infest cms, 288 



Plant diseases, control of, 295, 339 



Plant forms, 37 



Plant growth and microorganisms, 



164, 246-260, 333 

 Plant materials, composition of, 103 

 Plant residues, 29 



composition of, 98, 150 

 decomposition of, 35-36, 40, 95- 

 123, 126, 149 

 Plant roots, 334 



Plants, and microorganisms, 262 

 effect on microbial population, 250- 

 258 

 Plasmodiophora brassicae, 287 

 Plate culture methods, 45, 46, 47 

 Plectridium, 193, 344 

 Podzol, 29, 30, 47, 127, 144 

 Poly poms annosus, 121 

 Polyuronides, 1 16 

 Popillia japonica, 291 

 Population, microbiological, 6, 17, 18, 

 22, 27, 29-58, 261, 275, 293, 

 335, 340 

 Poria, 121 

 Potassium, transformation of, 240- 



241 

 Potato scab, 286, 287, 292, 296 

 Powdery scab, 291 

 "Pox" of sweet potatoes, 290, 296 

 Predaceous fungi, 84 

 Protein decomposition, 45, 48, 108, 



117-120, 166-172 

 Proteus vulgaris, 172 

 Protosea cuprea, 75 

 Protozoa, 88-92 



effect on bacteria, 273 

 in soil, 37, 55 

 Protozoan theory, 22, 273, 299 

 Psalliota campestris, 121 

 Pseudomonas aeruginosa, 187, 268, 



270, 283, 284 

 Ps. citri, 293 

 Ps. fluorescens, 66, 69, 170, 172, 173, 



175, 243, 264, 268, 270 

 Ps. fluorescens liquefaciens, 172, 235 



