INDEX 



419 



Unimproved land, in the United States, 

 location and extent, 4. 



United States, area of, 4. 



Utah, cattle and sheep grazed under 

 permit, 21; investigations in, for 

 study in grazing course, 376. 



Vacciniaceae, for study in grazing 

 course, 369. 



Vagnera stellata, indicator plant, 129. 



Valerian family, for study in grazing 

 course, 369. 



Valerianaceae, far study in grazing 

 course, 369. 



Vegetative cover, on range grazed 

 annually, (fig.) 122; on plot pro- 

 tected from grazing, (fig.) 123, 

 (table) 125; relation to erosion, 

 173; factor in erosion, 177, 179, 

 182; establishment of, a difficult 

 task, 189; functions of vegetation 

 that remains on ground at end of 

 season, 221; replacement after fire, 

 226; study of, in grazing course, 



375- 



Vegetative degeneration, 117. 



Vegetative progression, 117. 



Vetch, introduced from Old World, 55; 

 cultivated pasture plant, 151; spe- 

 cies, 159. 



Vetch, common or spring, one of cul- 

 tivated species, 159; characteristics, 

 163. 



Vetch, hairy or sand, one of culti- 

 vated species, 159; characteristics, 

 (fig.) 161, 162; habitat, 162; seed- 

 ing, 163; value, 163. 



Vetch, narrow-leaved or Augusta, one 

 of cultivated species, 159; habitat. 



Veterinary science, auxiliary subject 

 in study of pasture management, 

 362; apphcation of, 363. 



Viabilit}^ of seed of native pasture 

 plants, 57; depends on vigor of 

 plants, 66; of Kentucky bluegrass, 

 134; essential of good seed, 165; 

 how to test, 165; determined by 

 denuded-plot method, 349. 



Vicia, species, 159. 



Vicia angusttfolia, one of cultivated 

 species, 159. 



Vicia saliva, one of cultivated species, 



159- 

 Vicia villosa, one of cultivated species, 



159, (fig.) 161. 

 Vigna Sinensis, field of, (fig.) 158; 



habit of growth, 158. 



Viola linguaefolia, in destruction of 

 foxglove-sweet sage-yarrow cover, 

 114; on bed ground, (fig.) 121; on 

 range grazed annually, (fig.) 122; 

 on protected plot, (fig.) 123; in- 

 dicator plant, 129; on chart plot, 

 (fig.) 342. 



Violet, dog's-tooth, annual plant, 324. 



Violet, tongue-leaved, in foxglove- 

 sweet sage-yarrow cover, 114; on 

 bed ground, (fig.) 121; on range 

 grazed annually, (fig.) 122; on pro- 

 tected plot, (fig.) 123; on protected 

 plot and on unprotected range, 125; 

 indicator plant, 129. 



Virginia, study of methods of cropping 

 and treating bluegrass pastures, 93. 



W 



Wasatch Mountains, height, 7; re- 

 seeding tests, 45; collecting seed, 

 57; harvesting experiments, 63; 

 study of principles of plant suc- 

 cession, 107; study of erosion in, 

 177; study of rainstorms in, 179; 

 study of soil types in, 183; study 

 of larkspur eradication in, 259. 



Washington, cattle and sheep grazed 

 under permit, 21; study of effect 

 of grazing on timber reproduction, 

 198; investigations in, for study in 

 grazing course, 376. 



Waste land, grazing type, 315, (fig.) 



Water, in Great Plains, 6; faciUties 

 improved by leasing system, 33; 

 ways of providing supply of, 78; 

 aid in deferred grazing, 83; weeds, 

 heavy users of, loi; necessity of, 

 in the West, 172; water erosion, due 

 to overgrazing, (fig.) 183; percen- 

 ta'ge of "nonavailable, " in eroded 

 and in noneroded soil, 184; require- 

 ments for selected plants per unit 

 dry weight on eroded and on non- 

 eroded soil, 186; aid in eliminating 

 poisonous substances, 246; factor 

 in utilizing forage crop, 295; avail- 

 ability of, 295; requirements of 

 stock, 296; distribution of, 296; 

 springs and seeps, 298; swamps, 

 299; wells, 304; factor in grazing 

 reconnaissance, 311; demand for 

 forage great where supply of, is 

 ample, 355; effect of, on stocking, 

 for study in grazing course, 365, 

 371; development of, for study in 

 grazing course, 375. 



Water hemlock, poisonous to stock. 



