SUBJECT INDEX 



445 



Plant— Continued . 



diseases— continued. 



in Washington, (33) 98, 698; (38) 47. 



West Indies, (30) 546; (35) 44; (37) 452. 

 West Virginia, (36) 6.53. 

 Western Australia, (33) 845. 

 Westphalia, (32) 238. 

 Wisconsin, (33) 344; (35) 844; (36) 845. 

 Wiirtteinberg, (28) 148; (29) 845. 

 inheritance, (27) 751. 

 international control, (30) 537; (31) 49, 342, 



699; (34) 442, 840; (38) 349. 

 introduction into United States, (36) 244. 

 law in Sudan, (27) 54. 

 legislation concerning, (27) 200; (31) 239. 

 legislation in Canada, (26) 2r)6. 

 legislation in Cevlon, (30) 146. 

 lessons on, (31) 394. 

 microbial, notes, (26) 372. 

 monograph, (27) 44. 

 mosaic, (38) 48. 



notes, (26) 452, 746, 844; (27) 45, 53, 349, 445, 

 449, 543, 746; (28) 345, 443, 544, 545; (29) 

 150, 243. 341, 446, 547, 645; (30) 147, 349, 

 647; (31) 745; (32) 641; (34) 643; (35) 242; 

 (36) 47, 448, 746; (38) 298, 646. 

 physiological, investigations, (33) 740. 

 diseases, relation to — 

 bacteria, (31) 745. 

 nutrition and weather, (27) 848. 

 soil fungi, (40) 318. 

 transportation, (39) 849. 

 weather, (29) 44; (34) 840; (35) 844; (39) 

 352, 353; (40) 154. 

 diseases — 



resistance to, (33) 740. 

 review of literature, (26) 51; (27) 148; (28) 

 345; (29) 445; (30) 47, 240, 648; (31) 145; 

 (39) 148. 

 sanitation in control, (27) 154. 

 studies, (26) 53, 142; (31) 840; (34) 743; (35) 



544. 

 studies, cooperation in, ^36) 540. 

 studies, methods, (35) 844. 

 studies, soil temperature as factor, (39) 148. 

 susceptibility to, (37) 245. 

 textbook, (30) 347; (34) 794; (38) 94. 

 transmission bv seeds, (36) 844. 

 treatise, (26) 142, 242; (27) 746; (28) 345; 

 (29) 150, 546, 644; (30) 240; (31) 241, 539, 

 745; (33) 646; (35) 835; (36) 236, 540, 628, 

 645; (40) 47. 

 treatment, (26) 48, 51, 345, 539; (27) 45, 128, 

 154, 253; (28) 442; (30) 648; (31) 50, 541, 635, 

 745; (32) 447; (33) 151; (34) 40, 642; (37) 

 51. 143. 247, 453, 544. 

 treatment, development in, (34) 48. 

 treatment with hot water, CM) 50. 

 tropical, treatise, (31) 241. 

 ecology — 



and soil science, (36) 523. 

 in agricultural courses, (38) 195. 

 of Salton Sink, (33) 525. 

 e^Tiorescences, exudations, and incrustations 



under arid conditions, (33) 825. 

 embryos as affected by endosperm of seeds, (29) 



421. 

 embryos, nutrition and growth, (38) 127. 

 enemies in Wiirttemberg, (28) 148. 

 enzyms, studies, (32) 523; (34) 428, 731; (35) 334. 

 exploration in China, (35) 140. 

 extracts, measurement of diastase activity, 



(33) 315. 

 fasciated, development, (37) 434. 

 flavone derivatives in, (37) 430. 

 food — 



absorption and utilization by sugar beets, 



(26) 737. 



accessories, bacterial test for, (34) 325. 

 as affected by crop rotation, (27) 821. 

 as aSected by fertilizers, (29) 623. 

 availability as affected by carbon dioxid, 



(27) 514. 



combinations for crops, (26) 622. 

 determination in soils, (27) 514; (32) 121. 

 effect on ratio of tops to roots, (31) 628. 

 essential elements of, (26) 725. 

 loss in drainage, (27) 321; (30) 22; (33) 619; 



(35) 623. 

 mineral, factors affecting in soils, (26) 814. 



Plant— Continued, 

 food— continued. 



nitrogenous, availability, (27) 500. 

 production as affected by soil sterilization, 



(29) 122. 



production in soils, (.30) 624; (35) 322, 424. 



ratio, effect on quality of sugar beets, (28) 

 43. 



relation to chlorosis, (28) 623. 



relation to soil fertility, (26) 621; (28) 220. 



relation to soil protozoa, (30) 517. 



removal by corn crop, (35) 623; (37) 232. 



requirements of forest soils, (26) 744 

 galls, treatise. (26) 6,58; (30) 8.52. 

 genetics, textbook, (40) 817. 

 geography, physiological, of Jamaica, (32) 748. 

 globulins, preparation, (35) 9. 

 growth- 

 abnormal forms, (34) 143. 



accessory factors for, (31) 826; (38) 328. 



and climate, relationship, (30) 16. 



and distribution, relation to transpiration , 



(30) 625. 



and soils, treatise, (39) 512. 



and swelling, relation to temperature, (39) 



731. 

 growth as affected by- 

 acids, bases, and salts, (29) 26. 

 air movement, (38) 223. 

 atmospheric pollution, (33) 126. 

 bastard trenching, (30) 236. 

 boron, (29) 219; (34) 428, 625. 

 carbon bisulphid, (33) 323; (35) 20. 

 carbon dioxid. (31) 521; (32) 728. 

 different substances, (29) 421. 

 electric light, (39) 230. 

 electricity, (27) 28, 231; (28) 227, 228, 827; 



(30) 524, 827, 828; (31) 189, 428. 

 fertilizer salts, (29) 329. 

 irrigation, (28) 229. 



light, (28) 227; (33) 128, 826; (34) 223; (35) 129. 

 magnesia, (26) 723. 

 manganese, (39) 627. 

 manganese and aluminum, (30) 824. 

 nitrogenous soil constituents, (29) 219. 

 nutrient and nonnutrieut bases, (30) 128. 

 organic substances, (37) 632; (39) 526. 

 osmotic pressure in nutrient solutions, (35) 



434. 

 phytin, (28) 128. 

 radioactive earth, (33) 123. 

 radium, (31) 821; (34) 223. 

 shade, (27) 741; (29) 130; (30) 343. 

 smelter fumes, (28) 623. 

 smoke, (29) 422. 

 sodium salts, (35) 816. 

 sodium sulphate, (30) 31. 

 soil aeration, (27) 821. 

 soil bacteria, (31) 827. 

 soil constituents, (28) 417. 

 soluble humates, (30) 431, 721; (31) 516. 

 soot in the air, (26) 727. 

 spacing, (30) 633. 

 stimulants, (35) 4.34. 

 Streptothrix, (27) 620. 

 sulphur, (31) 623. 

 thorium X, (29) 131. 

 toxic salts, (31) 325. 

 volatile conifer products, (32) 618. 

 growth — 



at different air pressures, (36) 730. 



at different elevations, climatic factors, (39) 



809. 

 cause, (29) 420. 

 crescograiih for, (32) 222. 

 critical periods, (35) 617; (40) 19. 

 effect on retention of bases by soils, (32) 121. 

 effect on soils, (28) 520. 

 importance of water in, (26) 128. 

 in absolute darkness, (26) 431. 



artificial light, (28) 735. 



calcaieous soils, (31) 816. 



charcoal, (33) 540. 



distilled water and toxic solutions, (32) 

 627; (34) 825. 



glycogen solutions, (31) 625. 



heated soils, (26) 815; (31) 216; (35) 722. 



mercury vapor light, (33) 826. 



partially sterilized soils, (30) 225. 



water culture, (33) 223, 628; (39) 28. 



