"Smokey Bear," 484 



Snakes, 27-28, 558 



Snow 



melting, forest influence in, 29 

 studies in pine forests, 598-599 

 traps, value, 194, 196 



Snowbell (Japanese snowbell), 

 Styrax japonica, 47 



Snowberry 



common, Symphoricarpos all/us, 



131 



Symphoricarpos, 130 

 western, Symphoricarpos occiden- 

 talis, 131 



SNYDER, THOMAS E.: Insects in 

 Wood Products, 432-436 



Soapberry 

 Sap indus, 164 



western, Sapindus drummondi, 

 70 



Society of American Foresters, 112- 

 114, 655, 662, 710 



Sodium 



chlorate, for western black cur- 

 rant, 456-457 

 cyanide, production, 641 



Softwood 



definitions, 19, 6 16 



use, 616 



waste products, 646 



Softwoods 



chemical extraction, 640-641 

 identification, 836-838 

 supplies, prospects, 745, 752 



Soil- 

 absorptive capacity, 604 

 blowing, prevention, 193 

 building, conifers for, 207 

 burning effect, 118 

 composition, 114-115 

 conditioner, 642, 645 

 conservation, 612, 658-659 

 cover, removal, 596 

 effect on species, 115-117 

 erosion. See Erosion, 

 moisture, 196, 204 

 nutrients, 162-163 

 poisons, use, 435 

 preferences of trees, 4445 

 preparation for planting, 213 

 requirements, 87, 161, 212, 224 

 types, regional classification, 115 



Soil Conservation Service 



administration of land utilization 



projects, 389 



experiments on soil-tree relation- 

 ships, 119 



public forest-tree nurseries, 893 

 shelterbelt plantings, 193 

 teaching outlines, 658-659 

 work in watershed programs, 613 



Soiling crops, use in nurseries, 163 



Soils and Forests. John T. Auten, 

 T. I. Plair, 114-119 



Soils 



effect of grazing, 118 

 shallow, effects, 126 



Index 



Sonoma County, Calif., fire cam- 

 paign, 484 



Soo Line, foresters, 684 

 Soot, effect on trees, 43 

 Sour gum (black tupelo), Nyssa 



sylvatica, 43, 44, 46 

 Sourwood, Oxydendrum arboreum, 



130 



South- 

 direct seeding, 139 

 fire fighting, 527, 532 

 fires, size analysis, 531 

 forest 



land, extent, 715 

 productiveness, 716 

 range, acreage, 726 

 situation, 717, 718, 719 

 forestry, large ownerships, 279- 



285 



forests, ownership, 279 

 grazing of pinelands, 520 

 machines in fire fighting, 527- 



532 



mimosa, breeding, 470 

 pine crossing, 151 

 planting bar, use, 208 

 planting small woodland. W. 



R. Hine, 211-218 

 saw timber, 719 

 species to plant, 224 

 State forest acreage, 391 

 timber capacity, 520 

 wildlife management, 569 

 wooded acres, extent, 520 

 South Africa, hybrid poplars, 156 

 South America 

 hybrid poplars, 156 

 wood situation, 742, 750 

 South Carolina- 

 bark beetles, 428 

 forestry in schools, 659 

 profit from wood lot, 174 

 South Dakota- 

 Black Hills, forestry, 319-326 

 insect deadening, 410 

 shelterbelts, 193 



South Fork Wilderness area, 538 

 Southeast 



wildlife management, 569 

 pine crossing, 151 

 shade trees for, 60-65 

 trees for, recommendations, 846- 



847 



windbreaks, 198 

 Southeastern Forest Experiment 



Station, 293 



Southern pine beetle, 217, 427 

 Southern Forest Experiment Sta- 

 tion, 297, 517, 525 

 Southern Forestry Conference, 668 

 Southern Pacific Railway Co., 684 

 Southern Pine Assn., 668-669 

 Southern Pulpwood Conservation 



Assn., 283, 661, 671 

 Southern Railway System, foresters, 

 684 



939 



Southwest- 

 forest types, classification of, 



111, 342-343 

 hybrid pines, 151, 152 

 mistletoe damage, 460 

 pinyon-juniper, 342-347 

 ponderosa pine, 347-352 

 windbreaks, 198 

 SOWDER, ARTHUR M.: 



Christmas Trees, 245-247; 248- 



251; 251-254 



Harvesting Small Forest, 237-244 

 Sowing. See Seeding. 

 Soybeans, for glue, 637 

 Spacing- 

 plantation, principles, 208-209 

 shade trees, 86-87 

 southern woodland, 213 

 Spanish, in Southwest, 344 

 Spanish Peaks Wild Area, 542 

 SPARHAWK, W. N.: History of 

 Forestry in America, 702-714 

 SPAULDING, PERLEY: Blister Rust 



on White Pine, 453-458 

 Species, soil effect, 115-117 

 Spicebush, common, Lindera ben- 



zoin, 130 



Spider mites, in shade trees, 98 

 SPILLE-RS, ARTHUR: Consulting 



Foresters, 662-663 

 Spiral grain, in wood, 201 

 Spraying, aerial 

 apparatus, 474-475 

 for tussock moth, 436-442 

 for gypsy moth control, 447 

 for insect control, 472473 

 time of day, 475-476 

 Spruce 



beetle-killed, four billion feet. 

 N. D. Wygant and Arthur L. 

 Nelson, 417-422 

 black, Picea mariana, 71, 363, 



772 



Black Hills (Black Hills white 

 spruce), Picea glauca var. 

 densata, 198 

 Black Hills white, Picea glauca 



var. densata, 60 

 blue, Picea pungens, 423, 803 

 budworm 



R. C. Brown, H. J. Mac- 

 Aloney, P. B. Dowden, 423- 

 427 



airplane surveys, 471 

 control, 411, 425, 472 

 damage in New England, 409 

 Colorado (blue spruce), Picea 



pungens, 76 

 Colorado blue (blue spruce), 



Picea pungens, 59, 71, 76 

 eastern, trade name for red, 



white, and black spruce, 616 

 Engelmann, Picea engelmanni, 



76, 144, 423, 616, 802-803 

 Norway, Picea abies, 148, 822 

 Oriental, Picea orientalis, 59 



