4i8 



INDEX 



Temporary pasture, 88; grass mixture 

 for, 148. 



Tenants, number occupying farms, 210. 



Terrace drag, used in terracing to 

 check erosion, (fig.) 193. 



Terracing, to check erosion, 192; ter- 

 race seeded to mountain brome- 

 grass, (fig.) 194. 



Tests, reseeding, 40, 41; result of, 

 45, (fig.) 47; causes of failure, 48 

 yearlong protection of pasture, 73 

 deferred grazing on winter ranges, 

 80; methods of cropping and treat- 

 ing bluegrass pasture, 93. 



Texas, leasing system, 30; use of wells 

 in Panhandle, 304; leasing system, 

 for study in grazing course, 366. 



Thaliclrum, untouched by stock, 126; 

 growth after burning brushland, 

 226. 



Tholiclnim Fcndleri, on range grazed 

 annually, (fig.) 122; on protected 

 plot, (fig.) 123. 



Theodolite, used in field work, 320. 



Thornber, J. J., tests in seeding native 

 forage plants, 40. 



Three-awn grasses, in Great Plains, 6; 

 injurious species 286, 288; for study 

 in grazing course, 368. 



Thresher, grain, 142. 



Ticks, to be considered in study of 

 entomology, 362. 



Timber, effects of grazing on repro- 

 duction, 198; factors that deter- 

 mine extent of damage to, 204; on 

 farm woodlands, 209; effects of goat 

 grazing on, 210; value of, on moun- 

 tain range, 228; deterrent effect on 

 erosion, 229; factor in determining 

 adaptability of range to stock, 311. 



Timber reconnaissance, aid in graz- 

 ing reconnaissance, 311; map for, 

 318; compared with grazing re- 

 connaissance, 321. 



Timbered areas, grazing type, 315, 

 (fig.) 316. 



Timbcrlands, grazing on, for study in 

 grazing course, 375. 



Timothy, area of growth, 5; in re- 

 seeding tests, 41, 43, 44, 4.S, 47; ele- 

 vational Hmitations, 50; relation of 

 yield to elevation, (fig.) 51; perma- 

 nency of yield, 52; amount to sow and 

 cost, s:i; moisture requirements, 54; 

 mi.xed seeding, 54, 141; introduced 

 from Old World, 55; on permanent 

 pasture, 88; period of yield, 90; 

 for hay and pasture combined, 132, 

 141; origin of name, 140; habits 

 of growth, (fig.) 141; seed habits, 



142; in mixtures, 148; for study in 

 grazing course, 368. 



Topography, factor in erosion, 177; 

 factor in extent of damage to timber 

 reproduction, 204; factor in con- 

 trol of watering places, 295; factor 

 in grazing reconnaissance, 308, 311; 

 for study in grazing course, 371, 

 375, 376. 



Toxicology, definition of term, 242. 



Trampling, of seed, by sheep, 45, 50; 

 timothy, not readily injured by, 52; 

 injury to newly seeded lands by, 55; 

 injury to plant roots by, 72; effect 

 of, on timber reproduction, 199, 

 200, 20I, 202, 235; on farm wood- 

 lands, 209; decreases danger from 

 fire, 233; factor in revegetation, 



349- 

 Transects, form of sample plot, 351. 

 Transit, used in field work, 320. 

 Traverse-sketching, method of ob- 

 taining forage data, 318, 319, 320. 

 Triangulation, method of obtaining 



forage data, 318, 320. 

 Trifolium, species and habitat, 152. 

 Trifoliiim hybridum, in reseeding tests, 



44; habit of growth, 152, (fig.) 153; 



introduced into United States, 152; 



seeding, 152. 

 Trifolium incarnatum, value as hay, 



152- 

 Trifolium pratense, in reseeding tests, 



44; value as hay, 152. 

 Trifolium repens, in reseeding tests, 



44; habit of growth, 153; seeding, 



153- 



Trisetum, for study in grazing course, 

 368. 



Trisetum, spiked, on range grazed 

 annually, (fig.) 122; on protected 

 plot, (fig.) 123; on protected plot 

 and on unprotected range, 125; indi- 

 cator plant, 130. 



Trisetum spicatutn, on range grazed 

 annually, (fig.) 122; on protected 

 plot, (fig.) 123; indicator plant, 130; 

 on chart plot, (fig.) 342. 



Troughs, location of, 290; kinds of, 

 300; foundation of, 301. 



Tusayan National Forest, cost of res- 

 ervoirs on, 304. 



T>'pe stages of native pasture vegeta- 

 tion, 107. 



U 



Umbelliferae, embraces poisonous spe- 

 cies, 243; for study in grazing course, 

 368. 



