Treesearch

THE CONCEPT THAT CLIMATE determines the geographic distribution of vegetation is generally accepted among ecologists. Seasonal variations in temperature and rainfaII are considered the most important climatic factors limiting the geographic distribution of a given species (Daubenmire, 1956). Because of its rapid growth and value for timber and naval stores, slash pine ( Pinus elliottii Engelm.) is one of the most important commercial tree species in the southern pine region. Most of the seedlings planted in reforestation programs in the South are slash pine (Mergen, 1955). The natural...

Pond pine (Pinus serotina, Michx. ) is the most frequent component of the overstory in the fuel types on organic soils areas of coastal North Carolina. Although pond pine stands are characteristically rather open, in blowup fire situations the burning foliage and branchwood contribute significantly to the total energy released.

One of the least explored variables in timber harvesting is the effect of ground conditions on log production . The Southern Hardwoods Laboratory is studying this variable and its influence on performance of skidding vehicles in Southern bottom lands. The test reported here was designed to evaluate the effects of bark features on skidding coefficients, but it also yielded information on other log characteristics and on effects of soil moisture.

Growth of cottonwood trees varies considerably between soil types, and landowners need to keep this in mind when they plant.