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Full-Text Articles in Physical Sciences and Mathematics
Predicting Equilibrium Moisture Content Of Some Foliar Forest Litter In The Northern Rocky Mountains, United States Department Of Agriculture, Forest Service
Predicting Equilibrium Moisture Content Of Some Foliar Forest Litter In The Northern Rocky Mountains, United States Department Of Agriculture, Forest Service
Forestry
Forest foliage that comprises much of the forest floor litter has higher equilibrium moisture content, EMC, than woody components. The EMC's at 300 degrees K were found to increase as follows: grasses < fir-spruce needles < pine-cedar needles < aspen leaves-larch needles. Equations that express Gibbs free energy associated with moisture content were used to develop regression equations that predict the EMC's from temperature and relative humidity, RH, for temperatures between 278 degrees K (40 degrees F) and 322 degrees K (120 degrees F) and RH's between 10 and 90 percent.
Pine Hollow Exclosures: Effect Of Browsing On An Aspen Community Sprayed With 2, 4-D, United States Department Of Agriculture, Forest Service
Pine Hollow Exclosures: Effect Of Browsing On An Aspen Community Sprayed With 2, 4-D, United States Department Of Agriculture, Forest Service
Forestry
The Pine Hollow aspen (Populus tremuloides) exclosures on the Ashley National Forest in eastern Utah were sampled in 1984, 19 years after they were established. The effects of 2, 4-D, wildlife, and cattle on plant succession were evaluated. Two exclosures were used to protect the sprayed area from (1) all animal use and (2) only livestock use. A third sprayed area was left open for use by all animals. The aspen overstory was killed as a result of spraying, with sufficient reproduction occurring to restock the stand. However, animal use drastically altered the aspen reproduction, as well as the understory …
Incidence Of Compression Wood And Stem Eccentricity In Lodgepole Pine Of North America, United States Department Of Agriculture, Forest Service
Incidence Of Compression Wood And Stem Eccentricity In Lodgepole Pine Of North America, United States Department Of Agriculture, Forest Service
Forestry
Trees 76 mm d.b.h. had higher stem-average percentage of compression wood than those 152 mm or 228 mm d.b.h. Latifolia had less compression wood (5.5 percent) than murrayana (7.7 percent). In both varieties, stem sections from 45° through 50° latitude were proportionally more free of compression wood than sections from other latitudes. Transverse stem sections typically displayed a main body of compression wood opposite an eccentrically located pith. Percentage of compression wood tended to be higher in stems that were out of round and close to ground level, and if pith was eccentric, specific gravity high, and moisture content low. …