. Growth and soil moisture in thinned lodgepole pine. Trees Growth; Soil moisture; Lodgepole pine. The area-occupied concept of crown competition factor can be examined in the light of actual production records. At a CCF of 33-1/3, the regression estimate of volume increment is cubic feet per acre annually (fig. 15). Theoretically at this density trees with crowns the size of those possessed by open grown trees would form only one-third of a complete crown canopy. However, if we assume trees growing at this density are using only one-third of the site, we arrive at a full site capacity of
. Growth and soil moisture in thinned lodgepole pine. Trees Growth; Soil moisture; Lodgepole pine. The area-occupied concept of crown competition factor can be examined in the light of actual production records. At a CCF of 33-1/3, the regression estimate of volume increment is cubic feet per acre annually (fig. 15). Theoretically at this density trees with crowns the size of those possessed by open grown trees would form only one-third of a complete crown canopy. However, if we assume trees growing at this density are using only one-third of the site, we arrive at a full site capacity of cubic feet per acre annually. Actual production at the higher densities (figs. 1Z and 15) suggests the upper limit is somewhere in the range of 1 ZO to 130 cubic feet per acre annually. Similarly a regression estimate of volume increment for CCF 100 is only cubic feet per acre annually, seemingly some- what below the full potential of the site. Thus at very low densities, lodgepole pine trees at Twin Lakes actually occupied more than the area indicated by the CCF equation; but at higher densities, they did not occupy as much area as estimated if we accept wood production as evidence of site use. Volume increase of the 100 largest trees per acre was definitely greater during the second period than during the first. There was also a trend of more rapid increase at the lower densities than at the higher ones (fig. 16). This means that growth capacity is being transferred to the larger, more useful trees with the passage of time and that the process is taking place more rapidly at the lower densities. Volume increment was much more sensitive to changes in stand density than was basal area increment. For example, during the first. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Dahms, Walter G. cn; P
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Keywords: ., bookcentury1900, bookcollectionbiodiver, booksubjectsoilmoisture
