SUBJECT INDEX 



461 



Potassium^Continued . 



salts, effect on— continued. 



purin metabolism, (28) 261. 



solubility of phosphates, (36) 626. 

 salts— 



equilibria in solutions, (39) 203, 204. 



extraction from silicate rocks, (29) 215. 



fertilizing value, (28) 123; (30) 527. 



flocculating power in clay, (27) 620. 



fractional crystallization, (39) 204. 



hygroscopicity, (35) 631. 



in salines of United States, (29) 214. 



toxicity in soU, (36) 515. 

 separation from sodium, (29) 807. 

 sUicate, fertilizing value, (30) 527; (31) 820. 

 silicate in phonolite, fertilizing value, (26) 726. 

 soil, studies, (27) 500. 



sulphate, as winter spray for fruits, (30) 641. 

 sulphate, eflect on — 



activity of soil bacteria, (31) 821. 



carnations, (36) 446. 



germination of seeds, (29) 328. 



marsh plants, (29) 531. 



powdery mildew infection, (33) 244. 



soU aciditv, (37) 23; (38) 620. 



tomatoes, (29) 339. 

 sulphate- 

 extraction from alunite, (26) 526. 



extraction from feldspar, (28) 223. 



fertilizing value, (26) 233, 329, 526, 536, 630, 

 639, 838; (27) 325, 530, 639; (28) 431; (29) 

 632, 829; (30) 437, 835; (31) 731; (32) 831; 

 (33) 432; (35) 22; (36) 121, 425; (37) 229,449, 

 527, 529, 729; (38) 32, 135, 218; (39) 518,530, 

 637; (40) 515, 516, 532, 633, 725, 733, 734. 



for carnations and roses, (29) 840. 

 citrus fruits, (31) 634. 

 sweet potatoes, (31) 437. 

 tobacco, (31) 738. 



imports into United States, (31) 726. 



nitrogen absorption capacity, (28) 325. 



preparation, (40; 801. 



secondary and subsidiary effects, (30) 26. 

 sulphid, effect on soU aciditj-, (37) 23. 

 sulphocarbonate as an insecticide, (32) 246. 

 sulphur mixture, insecticidal value, (34) 60. 

 tellurate as a fly repellent, (26) 755. 

 toxicity toward plants, (30) 128. 

 Potato — 

 aphid — 



alternate hosts, (39) 464. 



control by lady beetles, (34) 555. 



notes, (28) 554; (37) 761. 



pink and green, notes, (39) 761. 



pink and green, studies, (34) 550; (37) 849; 



(38) 462; (40) 456. 



relation to spinach blight, (39) 551. 



studies, (38) 654. 

 Association of America, proceedings, (37) 800; 



(40) 529. 

 bacterial- 

 diseases in Ontario, (37) 150. 



diseases, notes, (37) 652. 



diseases, studies, (26) 847. 



flbrovascular disease, notes, (26) 547. 



ring rot, studies, (33) 146. 



rot, notes, (27) 248. 



rot, studies, (26) 846; (30) 48; (35) 349. 



wilt, notes, (32) 50. 

 beetle, behavior in deserts, (40) 860. 

 beetle, Colorado — 



control by parasites, (37) 760. 



in Germany, (33) 158; (35) 57. 



life history, (34) 756. 



notes, (26) 865; (29) 252, 652; (33) 58; (34) 

 753; (37) 599; (38) 161, 653. 



on Pacific coast, (31) 254. 



oviposition, (34) 655. 



pigment and color pattern in, (26) 350. 



relation to tomato leaf spot, (40) 644. 



remedies, (27) 161; (28) 59; (33) 358; (35) 661, 



(39) 337, 853; (40) 330. 

 beetle, remedies, (30) 852; (40) 734. 

 black — 



canker or wart, (40) 848. 

 canker, treatment, (31) 149. 

 dot disease, notes, (32) 146. 

 heart, description, (33) 741. 

 heart, studies, (30) 149; (34) 242; (36) 349; 

 (38) 835. 



Potato — Continued . 

 black — continued . 



scab, international control, (30) 537. 

 scab, notes, (32) 342. 

 scab, studies, (26) 547. 

 scurf, treatment, (40) 450, 734, 847. 

 wart, notes, (27) 215. 

 blackleg — 



notes, (30) 197; (31) 641; (36) 250; (40) 449. 

 studies, (36) 648; (39) 148, 456. 

 treatment, (26) 546. 

 blight- 

 infection experiments, (34) 52. 

 notes, (26) 143; (31) 641, 746; (38) 449; (39) 



850. 

 prevalence in Ireland, (28) 151; (30) 539. 

 resistance to, (38) 828. 

 treatment, (27) 735; (30) 539; (33) 97; (38) 



235. 

 treatment with hot water, (34) 50. 

 blossoms, color variation, (39) 535. 

 blossoms, secretion of stigmatic fluid by, (33) 



233. 

 blotch and streak disease, identity, (32) 239. 

 Botrytis disease, (39) 250. 

 bread, recipes, (37) 364. 

 brown streak and blossom abortion, (37) 549. 

 cake, analyses, (36) 65. 

 canker- 

 description, (32) 443. 

 in Sweden, (33) 846. 

 notes, (31) 243. 

 studies, (26) 547. 

 treatment, (34) 247; (37) 249. 

 chips, preparation, (29) 414. 

 club champions in 1913, (30) 399. 

 clubs, suggestions for, (31) 793, 794. 

 collar rot, notes, (32) 442. 

 contests for boys and girls, (28) 194. 

 corky scab, notes, (34) 241; (35) 650. 

 corky scab, occurrence in Scotland, (26) 748, 

 curly dwarf, notes, (31) 748; (38) 545. 

 curly dwarf, studies, (36) 530; (37) 841. 

 curly leaf, studies, (34) 450. 

 diet, effects of, (34) 164. 

 diggers, descriptions, (27) 191. 

 diggers, tests, (27) 589. 

 disease, new, description. (33) 346. 

 disease, new in Hawaii, (40) 644. 

 diseases — 



and pests, (38) 834. 



conference on, (40) 846. 



control, (39) 53, 355. 



control in Canada, (38) 646. 



description and treatment, (38) 549. 



differentiation, (30) 649. 



dissemination by seed, (36) 847. 



due to handling and storing methods, (39) 



149. 

 hill selection as a preventive, (33) 98. 

 in Alaska, (39) 125, 127. 

 Bermuda, (38) 149. 

 Canada, (37) 553. 

 Dutch East Indies, (37) 249. 

 Germany, (37) 150. 

 Indiana, (38) 250. 

 Ireland, (37) 350. 

 New Jersey, (40) 747. 

 southern Idaho, (35) 751. 

 Switzerland, (37) 47. 

 Tasmania, (36) 846. 

 Western Australia, (33) 845. 

 notes, (26) 243, 844; (27) 150, 650; (28) 53, 148, 

 548, 645; (29) 141, 444, 549, 646; (30) 47, 

 240, 448, 539, 647; (.31) 52, 232, 543, 841; (32) 

 136, 544, 546, 642; (33) 52, 147, 544, 741, 849; 

 (34) 543, 744; (35) 48, 455; (36) Ml, 746; 

 (37) 37, 150, 538, 551, 652; (38) 535, 848; 

 (39) 353; (40) 50, 154, 344, 449, 746, 844, 847. 

 of Australia, treatise, (30) 48. 

 physiological, (39) 148. 

 diseases, relation to — 

 seed trade, (28) 738. 

 soU fungi, (39) 249. 

 temperature, (30) 649. 

 weather, (26) 53. 



diseases — 



review of Investigations, (27) 246; (31) 51; 

 (38)649. 



