900 



Moisture. Lack 275-87 



causing clianges in produc- 

 tion 278-79 



tip blight 189 



in the soil 182 



Moisture, Atmospheric. Sec Humidity. 



Mombacker disease of apricots 479 



Mongrel disease of tobacco 685 



Monilia cinerea 706 



— fructigena 706 



Monstra 57 



Monstrosities 57 



Moon-rings 613 



Moor plants, Horticultural 260 



Moor soil. Bacterial flora 256 



Changes through cultivation. 256-58 



Depth of ground water level... 257 



Disadvantages 240-63 



Draining 257 



Fertilization 257-58 



Potassium chlorid treatment. . .257 



Sanding 256 



Moor vegetation. Susceptibility to 



frost ." 251-53 



Morphaesthesia 139 



Mosaic disease 229, 684-89 



Contagium vivum fluidum 688 



Effect of cultivation 687 



Predisposition 687 



Virus 687 



Mosaikbeiegsege of tobacco 685 



La Mosaique of tobacco 685 



Movement phenomena, due to frost. .547-53 



Mucor 53, 766 



Mucor albus e,s 



— raceiiwsiis lOi 



— spiiwsus 99 



— stoloiiifer 13, lot 



Mulberry. Ishil^ubyo 690 



— Sliikuyobyo 690 



— Shrivelling disease .690-92 



Mulching 184-85, 235 



Mules disease of potatoes 161-63 



Multicolor of potatoes 391 



Mycoplasm 34 



Mycorrhiza 11 



MyrDiccodia cchiiiata. Intumescence. . .437 

 Myrtus 133 



Nanism 142-47 



Necrobiosis 703 



Necrosis 56 



— Spotted 372, 741 



Xccfria ditissiiiia 46. 137, 588, 592 



Xcfytuii 760 



Nickel in waste water 755 



Nicotine 460 



Xiellc of tobacco 685 



Nidularia 53 



Nit>flc on Gingko Biloba 386 



Nitrate of soda fertilization 193, 223 



_— — See also Chile saltpeter. 



Nitric acid 730 



Nitrogen 270 



— Excess. Effect 365, 387-99. "09 



Effect on rhubarb 392 



Retarding effect on ripening. . .394 



Nitrogen. Lack. Clianges in produc- 

 tion 287-98 



Nitrogen fertilization. Excessive. Effect 



on decorative plants 393-95 



— hunger 270 



Jaundice 310 



— storage by bacteria 270 



Nutriment. Increased concentration. 360-87 



— Lack 175. 275, 287-319 



— Relation to plants 274-319 



Nyctomyces 56 



Xyctoiiiyces candid lis 614 



— utilis 614 



Oculation. See Budding. 



Oecological variations j^ 



Oedema 335-39 



Oil fumes. Injury 757 



Olive. Gummosis 711 



Olivile 711 



Ooze coating. Injury to sewage dis- 

 posal beds 366 



Ophiobolus 137 



— causing lodging of grain stalks. .. .542 



Optimum degree of functioning 9 



Opuntia. Cork disease 429 



Orange. Die-back 392 



Orange, Bitter. Gummy exudation. . .708-9 

 Orchids. Classiness 651, 717 



— Specking 26 1 -63 



— Use of leaf mould 262 



Organism. Cultural aim 6 



— Developmental mechanics 66 



— Force of self-preservation 6 



— Self-purpose 6 



Organs, Axial. Wounds 772-880 



Organs, Sexual, in cryptogams 289 



Orobus vcrnns 75 



"Orterde" 243 



Osinunda regalis 288 



Outgrowths on roots 191 



Over-fertilization of celery 392 



— of field plants 392-93 



— of rhubarb 392 



— of vegetables 392-93 



Overgrowth edges. Gnarly 859-61 



Overgrowth of wounds 776-81, 783 



Oxalate of calcium 792 



Oxalic acid 22;^, 449 



content of edible roots 22$ 



Oxalis crenata 109 



Oxygen. Excess. Effect 315 



— Lack. Effect 313-16 



Suffocation 313 



— Necessity in germination 109 



Oxygen rigor 313 



Oxyphen acid 503 



Paconia arborea. Bud cuttings 828 



Pan-genesis 31 



Panachure. See Variegation. 



Paiidanus javaiiicus. Yellow spots 434 



Pat'aver somnifcrum. Pistillody 372 



Parasites. Energy of growth 15 



— Nutritive substrata 17 



Parasites, Facultative 15 



— Obligate 15 



