1920] 



INDEX OF SUBJECTS. 



999 



Tomato — Continued. 



moth, control, 454. 



Rhizoetonla, studios. Wash., 749. 



root knot, control, 47. 



root rot, notes, 154. 



rust, notes, 340. 



seed distribution, Ind., 3;i8. 



seed, seloctiufj and saving, Ind., 835. 



Septoria leaf spot, notes, Ind., 345 ; 

 Okla., 36. 



sleeping sickness, 244. 



sleepy disease, control. Pa., 549. 



spotted wilt, 154. 



stem rot, notes, G56. 



stigmonose, control, Pa., 549. 



white leaf curl, control. Pa., 549. 



wilt, notes, 151, 656 ; Okla., 44. 



worms on tobacco, Ky., 359, 

 Tomatoes — 



as aflfected by deteriorated calcium 

 cyanamid, 628. 



as affected by soil electrification, Ky., 

 824. 



breeding experiments, 741 ; Md., 144 ; 

 Pa., 537. 



carbon-nitrogen ratio for, 430. 



changes in composition during ripen- 

 ing, U.S.D.A.. 834. 



culture, Ky., 37. 



fertilizer experiments, Ind., 338 ; Mo., 

 742 ; Tex., 37. 



Fusarium resistant varieties, Md., 151. 



grade specifications, U.S.D.A., 144. 



pollination tests, 437. 



pruning and training, 644 ; Ky., 37. 



ripening process, U.S.D.A., 834. 



root development, 834. 



spraying experiments, 246, 656. 



staking, 339 ; Ky., 37. 



variety tests, 833 ; Ind., 338. 



wilt-resistant strains, 742. 

 Topography, relation to frost, 417. 

 Tornadoes, papers on, U.S.D.A., 511, 719. 

 Tortrix fumiferana, notes, 852. 

 Torula lactu-cotidenM n. sp., description, 



Iowa, 76. 

 Tourmalin, boric acid determination In, 



413. 

 Tosca, new genus, erection, 853. 

 Towoptera gratninum, notes, 556. 

 Trachelus tahidux, notes, U.S.D.A., 363. 

 Trachycentra chloro gramma, notes, 52. 

 Tractor — 



development, 286. 



engines, cooling, principles of, 88. 



engines, design, 88. 



engines, lubrication, 89. 



engines, tests, 287. 



engines, valves for, 288. 



farming, notes, 892. 



fuel, kerosene for, 891. 



parts, standardization, 89. 



plowing speeds, 390. 



plowing tests, 690. 



plows. (See Plows, tractor.) 



power on farms, Ariz., 788. 



Traotor — Continued. 



testing at Purdue University, 287. 

 tests, 287. 

 Tractor.s — 



American l-. Swedish, tests, 690. 

 and implements blue book for 1920, 



287. 

 artillery, use in dam construction, 89. 

 design, 87. 



design, factors affecting, 592. 

 economy of operation, 187. 

 effect of speed on power required, 



288. 

 effect on use of horses, U.S.D.A., 690. 

 friction transmissions, 89. 

 gas, recent changes in design, 88. 

 in France, 289. 

 in Iowa farming, Iowa, 89. 

 in Tenne.ssee farming, 690. 

 in United States, 390. 

 mechanical analysis, 287. 

 protection against freezing, 484. 

 track-laying, building. 89. 

 use in Kentucky, Ky., 389. 

 use in reclaiming swamp laud, 484. 

 Tragacanth — 



ashes, fertilizing value, 324. 

 mucilage in, origin, 132. 

 Tramctc^ pini on maritime pines, 755. 

 Transpiration — 



as affected by light, 131. 

 in Tilia- amcricana, 223. 

 negative pressure and water require- 

 ments, 131. 

 of maritime plants, 223. 

 Transplanting, season for, studies. Mo., 142. 

 Transportation rates, relation to agricul- 

 ture in Spain, 488. 

 Tree — 



architectonics, studies, 819. 

 chlorosis, notes, N.Mcx., 345. 

 chlorosis, treatment, 752. 

 planting, dynamite for, 480. 

 wounds, treatment, 349. 

 Trees — 



annual rings, climatic effects, 809. 

 as affected by sodium chlorid, 343. 

 as agents in condensation of moisture, 



16. 

 as windbreaks, 650. 

 coniferous. (See Conifers.) 

 economic, in Great Britain, 344. 

 foliage, variegation in, 729. 

 for Iowa, 742. 

 for Nebraska, list, 240. 

 forest, culture, Nebr., 650. 

 forest for Idaho, Idaho, 650. 

 forest, winter Injury, 732. 

 growth studies, 819. 

 new, near Washington, D. C, 222. 

 ornamental, culture experiments, 



U.S.D.A., 339. 

 ornamental, for Ohio, Ohio, 342. 

 ornamental in South Africa, 441. 

 ornamental, tests, U.S.D.A., 339. 

 ornamental, winter Injury, 753. 



