Báo cáo lâm nghiệp: "Predicting solar radiation transmittance in the understory of even-aged coniferous stands in temperate forests" ppt

... characteristics, the time since last thin- ning τ and the thinning intensity I were retained for this study. Thin- ning intensity I is defined in terms of basal area, being equal to the ratio of absolute ... since thinning increased (data not shown). Thus the influences of stand age, time since last thinning and intensity of last thinning on extinction coefficient b (relat...

Ngày tải lên: 08/08/2014, 01:22

... height of insert point of the highest branch and the height of insert point of the branch of interest). In every annual shoot of the stem, the branches were ordered from the top to the base according ... calculate the insert height of the branches to the pith level. hr is the calculated insert position of the branches to the pith level: hm is the...

Ngày tải lên: 07/08/2014, 16:21

... the potential damage caused by fire in any forest stand in Catalonia, depending on the site and the structure of the stand. In addition to predicting the degree of damage at the stand level, the ... and 2001). In the case of fires that occurred in the same year as one of the IFN measurements, the exact dates of the fire event and of the IFN measure...

Ngày tải lên: 07/08/2014, 16:21

... R. in the wet, cool SBS subzone, and in West Kootenay in the moist, warm ICH subzone in the southern interior; and the least infected sites along the western edge of the Interior (east of the Coastal ... plots, surrounding vegetation and previous silviculture regime may influence the level of infestation of these pests. For example, we inspected the infection...

Ngày tải lên: 08/08/2014, 00:21

... consisted of determining the number of years of suppressed growth and then applying the linear height growth of the subsequent years to the suppression period. Suppressed growth was defined as the very ... variables to the model. Then, to determine the variables that played a significant role in explaining the variation of ring width index and annual volume increme...

Ngày tải lên: 08/08/2014, 00:21

... In the first case, fusiform cells were counted along the radial files in the xylem portion of the cambium (i.e., to the inside of the cambial initials). In the second case, the total number of ... derived using the corresponding estimated basal values, accounted for more than 95% of the variation in the sets of data. The number of fusiform cells in...

Ngày tải lên: 08/08/2014, 00:22

... within the shaded area (Jianghua Sun, 2004, unpublished data). 126 A.J. Carnegie et al. There are large areas of forests of P. massoniana in the south-east of China and of Larix gmelinii in the ... noctilio F. in the Andean-Patagonian region in Argentina, in: Iede E., Shaitza E., Penteado S., Reardon R., Murphy T. (Eds.), Proceedings of a Conference: Training in...

Ngày tải lên: 08/08/2014, 00:22

... different thermal chocks and control situation. Control 50ºC 75ºC 100ºC 125ºC 1 min 5 min 10 min 15 min 1 min 5 min 10 min 15 min 1 min 5 min 10 min 15 min 1 min 5 min 10 min 15 min Halimium ... from the boreal region in northern and eastern areas to the Mediterranean mountains in the south- ern part of the continent. An accurate assessment of the regen- eration process of...

Ngày tải lên: 08/08/2014, 01:21

... thinning the forest stand. The approach presented in this research allows the increase of rigidity and shrinkage coefficients due to the increase of the annual ring width to be quantified. Finally, ... function of x, the last term in the left hand side vanishes. Finally, the order 0 is required to close the problem. Keep- ing in mind that is anti-periodic and int...

Ngày tải lên: 08/08/2014, 01:21

... blunt cutting edge does not cut the material in the process of chip cutting. It is mainly in the plain passing the lowest point of the cutting edge but it is also in the plain lying a little ... against the leading edge of the tooth, – forces necessary for suppression of friction on the back and leading surfaces against the machined surface. Defining the...

Ngày tải lên: 07/08/2014, 03:22