35° 



INDEX 



Sectional area, i6i, 172 



Seed, dissemination, 27, 29, 48, 51, 64 



loss from rodents, 28, 49 



production, 48 



source of, 27 



stored in the duff, 27, 42, 224 



stored on the trees, 27, 42 



supply, 17, 45, S7 

 Seed cutting, 60, 63, 68 

 Seed groups, 51 

 Seed tree method, 15, 34, 44, 59, 77 



advantages, 55 



application of, 57, 79 



definition, 44 



details of, 45 



disadvantages, 55, 56 

 . marking for, 207 



modifications of, 50 



slash disposal for, 230 

 Seed trees, 44, 47, 48, 57 

 Seedbed, 61, 63 

 Seedling sprouts, 132 

 Selection, 14, 15, 56, 57, 72, 77, 137 



advantages, 102 



application of, 106, 297, 298 



definition, 83 



details of, 84 



disadvantages, 102, 104 



extensive versus intensive applica- 

 tion, 98 



increment under, 104 



marking for, 207 



modifications of, 96 



protection against frost and snow, 

 279 



quality of timber produced, 104 



requires protection from grazing, 

 289 



single tree, 87 



slash disposal for, 230 



strip, 98 



thinning, 177 

 Severance cutting, 143, 195, 208, 261 



Shallow rooted spedes, 40, 46 



Sheep, 284, 286, 289 



Shelterwood, 14, 15, 34. S6. S7. 59. 108, 



139 



advantages, 77 



application of, 79, 228 



definition, 59 



details of, 59 



disadvantages, 77, 78 



extensively applied, 72, 80 



groups, 72, 7S 



intensive application of, 72, 78 



marking for, 207 



modifications of, 66 



number of cuttings, 60 



protection against frost, 279 



slash disposal for, 230 

 Shifting sands, 296, 298 

 Shortleaf pine, 58, 154, 286 

 Silvics, I, 2, IS, 18 

 Silvicultuial practice, 2, 12, 198 

 Silvicultural system, 11 

 Silviculture, compared with agrictil- 

 ture, 2 



cost of, 7 



field of, s 



intensive, 2, 141, 203 



practice of, i, 2 



purpose of, s 



relation to silvics, i 

 Simple coppice, iii, 127, 136, 137, 



138 

 Single tree selection, 87 

 Site, preparation of, ^, 6, 57, 63, 116 



range of, 16 

 Slash, application of methods of 

 disposal, 229 



broadcast burning of, 223, 229 



burning as logging proceeds, 223 



coniferous, 216 



cost of, 233 



definition, 215 



disposal affects insect control, 268 



