Báo cáo lâm nghiệp: " A collection of functions to determine annual tree carbon increment via stem-analysis" pot

... h i ). Stem lateral surface area (A) is calculated as the sum of each log lateral area and the lateral area of the cone formed by tree tip: . 2 wG ⋅= π () ii ii i hh GG v −⋅ + = + + 1 1 2 () ntree n n i i hh G vV ... dell'Appennino Pistoiese, in Atti del seminario funzionalità del sistema faggeta, Accademia Ita- liana di Scienze Forestali, 1995, pp. 309–318. [6] Carey E., Sala A....

Ngày tải lên: 08/08/2014, 01:22

... quantity and quality of organic matter and by the altitude of sampling sites. e higher values of medians of zinc, lead and cadmium contents are found in the area of the Pass. Chromium is an ... ICP-AES as the technique of detection (Z 1994). Methods of statistical analysis Exploratory statistical analysis involves the ex- amination of mean values, coefficients of vari...

Ngày tải lên: 07/08/2014, 10:21

... evaluated by plots of residuals against measure- ment years and natural-geographical regions of Denmark according to Jakobsen [22]. In addition to the visual appraisal of the errors a number of ... is often a limited amount of data available for esti- mating the site-specific parameter. We employed a sensitivity analysis to assess the importance of the available amount...

Ngày tải lên: 07/08/2014, 16:21

... solar radiation and precipitation and was assumed to apply for each year from 1860 to 2100. The effect of changing air temperature was described using a version of the data of the analysis of HADCM2 ... Surface litter pools 3 0 914 R. Milne, M. Van Oijen Figure 2. Mean European, boreal, temperate and Mediterranean average annual temperature anomaly (relative to 1961 to 199...

Ngày tải lên: 08/08/2014, 00:22

... The parameter estimates changed from variant to variant, but the shape of the curves only changed marginally, at least within the range of the of the data. The statistical analysis shows that height ... distribution of the data shows that the curve shapes are not well-supported by data at older ages and higher site indices. The curves for site indices 10 and 15 m have a reasonable...

Ngày tải lên: 08/08/2014, 01:22

... stands was analyzed. At the same time, the basal area (G) of (crown and undercrown) breaks, windfalls and standing trees was determined there. Circular sample plots (200 and 500 m 2 ), the area ... Republic 2 Faculty of Forestry, University of Agriculture, Cracow, Poland ABSTRACT: In 25 to 40-years-old stands damaged by snow in the Beskids, the fauna of cambioxylophages was anal...

Ngày tải lên: 07/08/2014, 04:20

... Toowoomba, Australia ABSTRACT: e collection and sale of asparagus (Asparagus racemosus Willd.) is a major source of income for Praja and Tamang castes around the Royal Chitwan National Park (RCNP) ... Sustainable Catchments (ACSC), University of Southern Queensland (USQ), Toowoomba, Australia 2 Faculty of Education and ACSC, USQ, Toowoomba, Australia 3 Faculty of Business and...

Ngày tải lên: 07/08/2014, 10:21

... data Validation data Total 1986–1991 27 12 39 1991–1996 37 17 54 1996–2001 42 21 63 Total 106 50 156 Table 2. Statistics of stand variables and tree variable Variables Fit data Validation data Min ... mean diameter in cm at age A t , D mt = arithmetic mean diameter in cm at age A t , B t = stand basal area in m 2 ·ha –1 at age A t , Dsd t = diameter standard deviation in cm at...

Ngày tải lên: 07/08/2014, 10:22

Ngày tải lên: 07/08/2014, 16:20

... that are designed so as to maintain a constant and relatively low basal area after each cycle (15 m 3 ha −1 ). The rotation of scenario 4 is fixed to 60 years. As for scenario 3, the thinnings are ... designed to lead to a fixed remaining stand basal area which in this case is variable from cycle to cycle and is calculated to optimize the biodiversity indicator. The particular...

Ngày tải lên: 07/08/2014, 16:21