INDEX 



411 



Penlslemon, in weed type, (fig.) 314- 



Penlstemon procerus, in depletion of 

 mixed grass and weed stage, 113; 

 habit of growth, (fig.) 114; on erod- 

 ed and on noneroded pasture, (fig.) 

 118; indicator plant, 129; on chart 

 plot, (fig.) 342. 



Peppergrass, indicator plant, 128. 



Peritonitis, caused by grasses, 288. 



Permanent pasture, 88; grass mixture 

 for, 148. 



Petroleum, used in killing poisonous 

 plants, 247. 



Phleum, for study in grazing course, 

 368. 



Phleum praknse, origin of name, 140; 

 habit of growth, 141. 



Phosphate, an ingredient of fertilizer, 

 99. 



Phosphoric acid, in eroded and in non- 

 eroded soil, 184; percentage re- 

 turned to soil in manure, 222. 



Photograph, to be taken of chart plot, 



345- 



Physiology, auxiliary subject in study 

 of pasture management, 361. 



Physostigmine salicylate, for larkspur 

 poisoning, 258. 



Pilocarpine hydrochloride, for larkspur 

 poisoning, 258. 



Pine, lodgepole, for troughs, 300. 



Pine, piiion, cropped hghtly by goats, 

 211; in woodland type, (fig.) 316, 

 317- 



Pine, sugar, injury to, by various 

 agencies, 199; injury to, by stock, 

 for study in grazing course, 376. 



Pine, yellow, t>'pe of National Forest, 

 moderate grazing and timber pro- 

 duction on, (fig.) 19; on cattle 

 range moderately grazed, (fig.) 24; 

 forage on, 198; damage to, by va- 

 rious agencies, 199; tree severely 

 browsed by sheep, (fig.) 201; effect 

 of grazing on reproduction in Ari- 

 zona and New Mexico, 202; injury 

 by cattle browsing, (fig.) 203; study 

 of grazing damage on Coconino 

 Forest, 204; eilcct of goat grazing 

 on, 210; used for troughs, 300; 

 injury to, by stock, for study in 

 grazing course, 376. 



Pingue, name for Colorado rubber- 

 weed, 276; (fig.) 278. 



Pifion pine, cropped lightly by goats, 

 211; in woodland type., (fig.) 316, 

 317- 



Piping, spring or seep water, 299. 



Pittsburg, floods at, 174. 



Planetable, used in field work, 320. 



Plant collection, for grazing recon- 

 naissance, 318. 



Plant cover, protection against erosion, 

 171; erosion resulting from de- 

 struction of, (fig.) 180. 



Plant foods, in eroded and in non- 

 eroded soils of same type, 184. 



Plant growth, relation of erosion to, 

 182; study of, on eroded and on 

 noneroded soil, 184; summary of, 

 (fig.) 188. 



Plant Industry, Bureau of, studies of 

 grazing capacity, 328. 



Plant succession, type stages of, 107; 

 study of, in grazing course, 384. 



Planlago Tiveedyi, on bed ground, (fig.) 

 121; on range grazed annually, 

 (fig.) 122; on protected plot, (fig.) 

 123. 



Plantain, winter annual of Southwest, 

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

 range grazed annually, (fig.) 122; 

 on protected plot, (fig.) 123; on 

 protected plot and on unprotected 

 range, 125. 



Plants, cultivated grasses and other 

 herbaceous, in reseeding tests, 43; 

 cultivated forage, moisture require- 

 ments of, 53; introduced. 55; natixe 

 forage, reseeding to, 56; herbaceous, 

 yield of, 60; pasture and hay, 89; 

 indicator, 107; cultivated, classi- 

 fication of, 132; nongrasslike for- 

 age, 151; herbaceous, growth of, 

 after fire, 226; stock-poisoning, 

 241, 250; poisonous and mechani- 

 cally injurious, 272; mechanically 

 injurious, 284; forage, growth re- 

 quirements, 366; grasslike, distin- 

 guished from true grasses, in grazing 

 course, 367; broad-leaved pasture, for 

 study, 369; objectionable, in graz- 

 ing course, 370; poisonous species, 

 for study, 370; collection and pres- 

 ervation of specimens, 371; forage, 

 new varieties of, in grazing course, 

 384; native pasture, general instruc- 

 tion in, 390. 



Plots, sample, permanent, 340; kinds 

 of, 340; how named, 341; chart 

 plot, 341; mapping chart plot, 

 (fig.) 342; list plot, 347; advantages 

 of list plot, 347; denuded or depop- 

 ulated, 349; other, 351; special 

 guide tapes, 351; plan for staking 

 permanent, (fig.) 353; season and 

 frequency of mapping, 354; pro- 

 tection, 355; dimensions, 356, (fig.) 

 357; size favored by writer, 358; 

 for study in grazing course, 385. 



