INDEX 



415 



254; Glauber's, for ergot poisoning, 

 282. 



Salts, soil, received by plant, depend- 

 ent on root system, 66; essential 

 to plant growth, 172. 



Sambitcus, in browse type, (fig.) 315. 



Sampson, Arthur W., reseeding of 

 mountain lands, 43; effect of re- 

 moving herbage several times in a 

 season, 63; study of effect of graz- 

 ing on timber reproduction, 198; 

 study of effects of sheep and cattle 

 grazing on aspen reproduction, 206; 

 observations of development of plant 

 cover after fires, 226; intensive study 

 of sample plots, mapping, and sum- 

 marizing data, 340. 



Sandbur, mechanically injurious, 284. 



Santa Rita Range Reserve, reseeding 

 studies on, 41; acreage required 

 per cow unit, 331. 



Saturation of eroded and noneroded 

 soil, 184. 



Schools, for professional training in 

 grazing, 390. 



Scribner, F. Lamson-, on Canada blue- 

 grass, 135. 



Scroplndariaceae, for study in grazing 

 course, 369. 



Second or late weed stage, 108, 113; 

 foxglove-yarrow-sweet sage type, 

 113; dominant plants, (fig.) 114; 

 destruction of, 114; value as for- 

 age, 115; area surrounding bed 

 ground, 119, (fig.) 120; indicator 

 plants, 129; for study in grazing 

 course, 374. 



Secretary of Agriculture, letter to 

 Forester, 17. 



Sedge, scattering and planting of seed, 

 67; in meadow type, 312; in grazing 

 course, 368. 



Sedge, broom, withstands fire, 224. 



Seed, amount and cost per acre, 52, 

 53; collecting, of native pasture 

 plants, 57; viability of, 57; pro- 

 duction, 66; scattering and plant- 

 ing, 67; essentials of, 164; how to 

 test, 165; how to obtain good, 165; 

 collecting and cost of, for study in 

 grazing course, 372. 



Seed habits, of annual plants, 74; of 

 plants of first or early weed stage, 

 irs; of Kentucky bluegrass, 134; 

 of Bermudagrass, r37; of timothy, 

 142; of white clover, 153; of sweet 

 clover, 155; of bur clover, 156; for 

 study in grazing course, 367. 



Seeder, grain, 141. 



Seeding, season for, 47; amount to sow 



and cost, 52, 53; to a mixture, 54; 

 where it wiU pay, 55; to native 

 forage plants, 56; to Kentucky 

 bluegrass, 134; to Canada blue- 

 grass, 135; to Bermudagrass, 137; 

 to Hungarian bromegrass, 138; to 

 redtop, 140; to timothy, 141; to 

 perennial ryegrass, 143; to Sudan- 

 grass, 145; to meadow fescue, 147; 

 to Alsike, 152; to white clover, 153; 

 to sweet clover, 155; to bur clover, 

 157; to alfalfa, 157; to cowpeas, 

 158; to soybeans, 159; to hairy 

 vetch, 163; to velvet bean, 163; 

 on terraced area, 193; season for, 

 for study in grazing course, 372. 



Seedlings, loss of, from natural agen- 

 cies, 67; destruction of, by grazing, 

 67; mountain bunchgrass, (fig.) 68; 

 at end of second season, (fig.) 69; 

 early in third year, (fig.) 70; at end 

 of third year, (fig.) 71; growth 

 favored by deferred grazing, 77; 

 loss of, on eroded areas, 189; dam- 

 age to, by grazing, 200, 202; com- 

 parative seasonal injury to, 201; 

 damage according to intensity of 

 grazing, 201; injury to, on farm 

 woodlands, 209; effect of goat graz- 

 ing on, 210. 



Seeds, winged, milkweed, 273. 



Seepage, meaning of, 298. 



Seeps, distinguished from springs, 298; 

 how to improve, 298. 



Sego, poison, name for death camas, 261. 



Senecio, sign of overgrazing, 106. 



Senecio Colitmbianus, indicator plant, 

 129. 



Senna, belonging to legumes, 151. 



Sensitive-plant, belonging to legumes, 

 151- 



Serviceberry, sign of overgrazing, 106; 

 effect of fire on, 226. 



Shadscale, on desert range of Great 

 Basin, 6; on winter desert range, 

 (fig-) 332. 



Shasta National Forest, study of effect 

 of grazing on timber reproduction 

 on, 198. 



Sheep, grazing on topical desert 

 range, (fig.) 7; thrive on winter 

 annual plants, 8; grazing on alpine 

 fir t>'pe of National Forest, (fig.) 

 19; number grazed on National 

 Forests, 21; increase on National 

 Forests from 1909 to 1919, 22; ex- 

 cluded from ranges, 23; used to 

 trample in seed, 50; injury to yel- 

 lew pine reproduction in Arizona 

 and New Mexico, 202; effect of 



