Growth patterns of vertical stems in nine ponderosa pines from a stand in the southern Sierra Nevada were analyzed for recent changes due to stand dominance position, age, climate, and ozone exposure. Large positive correlations were found between increments in volume growth and basal area at d.b.h. The results indicated that patterns of wood distribution along the bole were associated with age...

To achieve the goal of carbon neutrality, overseas plantation projects have been conducted in several countries, including Vietnam. In present study, stand growth models and a yield table were developed used to analyze economic feasibility Acacia hybrid plantations southern Diameter at breast height, tree number trees determined field; basal area, mean dominant density, volume estimated using s...

Productivity of old-growth beech forests in the Mediterranean Basin was measured by average stem basal area increment (BAI) of dominant trees at two mountain sites in the Italian Apennines. Both forests could be ascribed to the old-growth stage, but they differed markedly with regard to elevation (1000 vs. 1725 m a.s.l.), soil parent material (volcanic vs. calcareous), mean tree age (less than ...

Basal cell carcinoma (BCC) is a malignant tumor of epithelial cells that is composed of cells similar to those in the basal area of the epidermis and its appendages. Ninety- five percent of individuals with BCC are between 40 and 79 years old. It rarely occurs in younger individuals. Herein, a 20- year- old woman with type III skin, who had a BCC on her chin is presented. Since the clinic...

At the Bear Brook Watershed in Maine (BBWM), the forest tree composition was characterized and the effects of the chronic ammonium sulfate ((NH(4))(2)SO(4)) treatment on basal area growth, foliar chemistry, and gas exchange were investigated on forest species. The BBWM is a paired watershed forest ecosystem study with one watershed, West Bear (WB), treated since 1989 with 26.6 kg N ha(-1) year(...

We examined the effect of competition on stem growth of Picea glauca and Populus tremuloides in boreal mixedwood stands during the stem exclusion stage. We combined traditional approaches of collecting competition data with dendrochronology to provide retrospective measurements of stem diameter growth. Several competition indices including stand basal area (BA), the sum of stem diameter at brea...

An understanding of the interactions between climate change and forest structure on tree growth are needed for decision making in forest conservation and management. In this paper, we investigated the relative contribution of tree features and stand structure on Atlas cedar (Cedrus atlantica) radial growth in forests that have experienced heavy grazing and logging in the past. Dendrochronologic...

This study aimed to evaluate the concentrations of main macroelements in leaves and fruit grown following organic conventional practices, relate them physico-chemical parameters during commercial harvests. Three samplings were carried out maturation. Nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg) determined two flesh areas: basal apical. Weight, color, firmness, solub...

ammonium carbonate and ammonium sulfate have been proposed and used as two new fuels for synthesizing gamma alumina nanoparticles. the prepared samples have been characterized by x-ray diffraction (xrd), 2 n  adsorption (bet) and transmission electron microscopy (tem). a comparison has been made between the properties of the nanoparticles synthesized by these two fuels and other conventional fu...