Báo cáo lâm nghiệp: "Utilization of a dynamometric pendulum to estimate cutting forces involved during routing Comparison with actual calculated values" pdf
Báo cáo lâm nghiệp: "Utilization of a dynamometric pendulum to estimate cutting forces involved during routing. Comparison with actual calculated values" pdf
... 10.1051/forest:2005040 Original article Utilization of a dynamometric pendulum to estimate cutting forces involved during routing. Comparison with actual calculated values Florent EYMA a *, Pierre-Jean MÉAUSOONE b , ... (rake angle, clearance angle, cutting plane, etc.). The depth of cut has been decreased to 1mm in order to obtain appropriate chip forma...
Ngày tải lên: 08/08/2014, 00:22
Báo cáo lâm nghiệp: "Utilization of digital photogrammetry in forestry mapping" docx
... triangulation at the aerial images at the scale of 1:15,000 we can say that in the planar accuracy they match the 4 th class of cadastral mapping. Based on the results from aerial images at ... orientation of aerial images, triangulation, manual, half-automatic, automatic digital terrain model ge- neration. A digital photogrammetric system should include these modules: – Import...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Results of a phenological study of the tree layer of a mixed stand in the region of the Drahanská vrchovina Upland" ppt
... slope of the watershed ridge at an altitude of 625 m. e area is characterized by coordinates 16°41'30''E and 49°26'31''N in the geo- graphical unit of the Drahanská ... 1990 to 2006, mean annual temperature 6.96°C and total precipitation 734 mm were measured. Figs. 3 and 4 characterize the actual situation of the locality from the aspect of p...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: " Influence of a planting hole application of dolomitic limestone powder and basalt grit on the growth of Carpathian birch (Betula carpatica W. et K.) and soil chemistry in the air-polluted Jizerské hory Mts." pptx
... the Spekol 210 apparatus, plant available Ca and Mg by AAS (Atomic Absorption Spectroscopy). e samples of assimilatory tissues and soil sam- ples were analyzed at the Tomáš Laboratory using the ... influence of basalt grit on the sum of exchangeable bases, base saturation and cation exchange capacity was also less pronounced compared to liming. Basalt grit elevated the proportion...
Ngày tải lên: 07/08/2014, 10:22
Báo cáo lâm nghiệp: "Evaluation of a semi-empirical model for predicting fine root biomass in compositionally complex woodland vegetation" ppsx
... rainfall and/or moisture availability gradient. However, from analysis of global datasets, Schenk and Jackson [19] found no evidence that lateral root spread for trees varies with mean annual rainfall ... bootstrap mean and median calculated on the basis of tree height were more comparable to the bootstrap statis- tics of the measured mean than the corresponding measures calculat...
Ngày tải lên: 07/08/2014, 16:20
Báo cáo lâm nghiệp: "Variations of construction cost associated to leaf area renewal in saplings of two co-occurring temperate tree species (Acer platanoides L. and Fraxinus excelsior L.) along a light gradient" doc
... leaf. An average value of 10 measurements obtained on a sub-sample of leaves was calculated for each plant (A UV ). A tight cor- relation was found between A UV and the absorbance of a methanolic extract ... results). 2.5. Calculations and statistical analysis Leaf mass per unit area (LMA, g m –2 ) was calculated as the ratio between the leaf dry mass and leaf area of a...
Ngày tải lên: 08/08/2014, 00:22
Báo cáo lâm nghiệp: "Evapotranspiration of a declining Quercus robur (L.) stand from 1999 to 2001. I. Trees and forest floor daily transpiration" ppsx
... 265–274. [22] Granier A. , Anfodillo T., Sabatti M., Cochard H., Dreyer E., Tomasi M., Valentini R., Bréda N., Axial and radial water flow in the trunks of oak trees: a quantitative and qualitative analysis, ... (1989) 207– 231. [4] Bréda N., Granier A. , Intra- and inter-annual variations of transpi- ration, leaf area index and radial growth of a sessile oak stand (Quercus petrae...
Ngày tải lên: 08/08/2014, 00:22
Báo cáo lâm nghiệp: "Evapotranspiration of a declining Quercus robur (L.) stand from 1999 to 2001. II. Daily actual evapotranspiration and soil water reserve" potx
... several ways according to leaf area development. For periods of leaf area expansion and leaf fall, daily transpiration was calculated with an equation based on daily PET and on a relative LAI (LAI i /LAImax), ... each plot’s basal area, LAI and SA for the 3 years and for each type of species. Total LAI was estimated from litter Table I. For each year and each plot (Th.: Thinned; C...
Ngày tải lên: 08/08/2014, 00:22
Báo cáo lâm nghiệp: "Conversion of a natural broad-leafed evergreen forest into pure plantation forests in a subtropical area: Effects on carbon storage" pps
... Ormosia xylocarpa (OX) and Castanopsis kawakamii (CK), with an adjacent relict natural forest of Castanopsis kawakamii (NF, ~ 150 year old) in Sanming, Fujian, China. Overall estimates of total ... mid-subtropical China with high purity (85% of total stand basal area for C. kawaka- mii), old age (~ 150 year), and large area (~ 700 ha). In addition to C. kawakamii, the overstorey a...
Ngày tải lên: 08/08/2014, 00:22
Báo cáo lâm nghiệp: "Growth of a poplar short rotation coppice under elevated atmospheric CO2 concentrations (EUROFACE) depends on fertilization and species" ppt
... specific leaf area (SLA), the area of these leaves was calculated. A regression analysis between basal area and total leaf area of each harvested shoot, was used to calculate leaf area for each shoot ... height of a stool was determined with an extendable pole as the height of the tallest shoot of the stool. The basal area (BA) of each shoot, and the sum of basal areas...
Ngày tải lên: 08/08/2014, 01:21