. American forestry. Forests and forestry. RECONNAISSANCE: ITS RELATION TO FOREST PLANS. SUB-ALPIXK TYPE OF JEFFREY PINE AND RED FIR. MT. LASSEX, io,40U FEET ELEVATION, IN THE DISTANCE. siderably. The density and age of the stand, the distribution of the age classes, the species, and the topography of the country all materially affect the inflammability of a forest type. The reconnaissance map shows also the old burns that exist. By plotting these burns for the entire forest an idea of the relative fire hazard, based on past experience, is secured and the protective tmits can be established wi
. American forestry. Forests and forestry. RECONNAISSANCE: ITS RELATION TO FOREST PLANS. SUB-ALPIXK TYPE OF JEFFREY PINE AND RED FIR. MT. LASSEX, io,40U FEET ELEVATION, IN THE DISTANCE. siderably. The density and age of the stand, the distribution of the age classes, the species, and the topography of the country all materially affect the inflammability of a forest type. The reconnaissance map shows also the old burns that exist. By plotting these burns for the entire forest an idea of the relative fire hazard, based on past experience, is secured and the protective tmits can be established with this in mind. A complete map of this kind is of in- estimable value to the lookout. When he discovers a fire this map enables him to determine its exact location in regard to topography, timber, type, ownership, whether it is in a bad place or not, and how to get men to it most expeditiously. A matter of importance, also, is the question of how much timber we are protecting and what is the value of it? Also, how much more money can be put into fire protection? If the 'rough" reconnaissance methods employed in the past show that a forest possesses five billion feet of timber and an intensive reconnaissance of a good portion of the forest shows approximately two and one-half times as much timber, it is very evident that the funds allotted to it to protect five billion feet were actually spread out to cover two and one-half times that amount. Protection against insects and fung- ous diseases is an essential part of effi- cient forest protection. The greatest loss sustained by insects is in the sus- tained annual loss of scattered mer- chantable trees rather than by sudden serious outbreaks. Although only a few trees are killed here and there, the killed timber which accumulates year by year soon mounts to a surprising total. Proper control work can be in- stituted much more effectively if the centers of infestation have been located by a reconnaissance, either especially f
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
