SUBJECT INDEX 



523 



Nocardia, 375 



"Nodular organs," 380, 381, 383 

 Nucleoproteins, 140 

 Nursery stock, 410, 411 

 "Nutrilites," 289 



Nutrition, 1-36, 210, 232, 265, 282 

 growth factors, 24-28 

 implications, 29-31 

 mineral, 2-16 

 calcium, 4-5 

 concentration and proportion, 



5-10 

 copper, 13-14 

 difficulties, 10-13 

 iron, 13 

 manganese, 14 

 other elements, 16 

 sulphur, 4 

 zinc, 14-16 

 organic nutrients, 16-24 

 carbon requirements, 17-21 

 nitrogen requirements, 21-24 

 Nyctomyces entoxylinns, 487 



Oak, 98, 306 



Oats, 108, 258, 262, 272, 359 



Fulgum, 267 



Green Mountain, 269 



Green Russian, 269 



loose smut, 267 



Red Rustproof, 267, 269 , 



Ruakura, 269 



White Tartar, 269 

 Ocellus, 134, 135, 182 

 Odontoglossum, 304, 309, 310 

 Oecantlms niveus, 174 

 Oedocephalum albidiim, 151 

 Oidium, 431 

 Oils, 45 

 Okra, 401 

 Oleic acid, 80 



Oligocene period, 478, 479, 484 

 Olpidiopsis andreei, 461 

 Olpidiwn, 461 



brassicae, 181 



dicksonii, 460 

 Omphalia flavida, 137, 138 

 Onion smudge, 245 

 Onions, 110, 175, 231, 241, 243, 245 

 Onychomycosis, 366 

 Oochytriceae, 481 

 Oochytrhim lepidodendri, 481 



Oomycetes, 231, 464 

 Oospora, 375 



aurantia, 84 



citri-aiirantii, 20, 291 

 Oosporin, 84 

 Ophiobolus 



careciti, 193 



halimus, 466, 461, 469, 470 



herpotrichus, 161 



graminis, 22, 31, 158, 160, 161, 165, 

 281, 286, 287, 292, 294, 296 



Icmrinariae , 469 



miyabeamis, 289, 296 

 Ophiodothella, 137 

 Ophioglosswn, 299 

 Ophionectria cylmdrothecia, 405 

 Ophrys, 310 



Oranges, 108, 143, 163, 225, 269 

 Orbilia xanthostigma, 190 

 Orcadia 



ascophylli, 469 



pelvetiana, 469 

 Orchidaceae, 298, 301, 308 

 Orchids, 303, 304, 309, 310, 312 

 Ornithine, 83 

 Orthoptera, 173 

 Oryza sativa, 414 



Oryzaephilus surinamensis , 454, 456 

 Osmotic pressure, 5, 7, 29, 220, 247 

 Ostracoblade implexa, 460 

 Ostracoda, 481 

 Otidea leporina, 190 

 Ovularhes barbouri, 486 

 Ovulinia azaleae, 175 

 Oxalacetic acid, 71, 74 

 Oxalic acid, 13, 15, 62, 69, 70-71, 75, 



79, 163, 237, 238, 268 

 Oxaloacetate, 19 

 Oxidase, 48, 50, 58, 63 

 Oxidation-reduction systems, 63-64 

 Oxygen, 210, 230-231, 280 

 Oxygenase, 46, 41 

 Oxyphilic fungi, 161 

 Oyster mushroom, 339 



"Pacemakers," 98 

 Falaeomyces 



bacilloides, 480 



gordoni, 487 



gracilis, 481 



ma jus, 487 

 Paleozoic period, 481 

 Palm, 405, 486 



