Báo cáo lâm nghiệp: "A method for describing and modelling of within-ring wood density distribution in clones of three coniferous species" ppt

... expected change in distribution of within-ring density for one sd increase in ring width is presented in Figure 3. 3.4. Differences among clones in within-ring density Fluctuations in growth rate and within-ring ... relative contribution of clone differences to the overall variation in shape of within-ring frequency distributions of wood density....

Ngày tải lên: 08/08/2014, 00:21

... METHOD The method is based on the simple fact that cells are produced in a sequence from earlywood to latewood regardless of index value and not the inverse. Therefore, when dividing a tree ring into ... (ELw) and late-latewood (LLw) is marked with circle, triangle, and square, respectively. The vertical bars indicate the mean beginning position of each intra-ring zone of t...

Ngày tải lên: 08/08/2014, 00:22

... implementation of the information system physical model. Development of interfaces for data insertion Data insertion Data insertion in the information system Data transformation Development of data transformation ... M., Forest remote sensing in Italy in the framework of FRA2000, in: Zawila- Niedzwiecki T., Brach M. (Eds.), Remote sensing and forest moni- toring, EUR 19530,...

Ngày tải lên: 08/08/2014, 01:22

... effective and scala- ble mining method, called MINT (MIning Named-entity Transliteration equivalents), for mining of NETEs from large comparable corpo- ra. MINT addresses several challenges in mining ... learning over a training corpus consisting of about 16,000 single word NETEs, in each pair of languages. The training corpus in English-Hindi, English- Kannada and Eng...

Ngày tải lên: 24/03/2014, 03:20

... level of 20 min per tree to something in the order of one minute per tree, thus enabling the method to become more efficient and potentially usable in routine forest inventory. With improvements in ... profile of a standing tree, and secondly to test the repeatability of this method. Validation of this method was achieved by comparing the standing tree profile obtained by...

Ngày tải lên: 07/08/2014, 16:21

Ngày tải lên: 07/08/2014, 16:20

... different stands and trees for whom numbers and types of collected data vary according to the modelling objectives covering growth, thinning and volume, as de- scribed below. 2.2. Growth modelling Growth ... according to preset goals. It is made of three modules designed for (i) growth prediction based on initial stand density, thinning regime and site in- dex (scenari...

Ngày tải lên: 07/08/2014, 16:21

... five stand-level inputs for simulation: the age of the stand at the beginning and the end of the projection interval, and the initial dominant height, number of trees per hectare and stand basal ... M., Puumalainen J., Päivinen R., Comparison of Beta and Weibull functions for modelling basal area diameter distributions in stands of Pinus sylvestris and Picea abies,...

Ngày tải lên: 07/08/2014, 16:21

... of some aspects of tropical rain forest seedling ecology with suggestions for further inquiry, in: Swaine M.D. (Ed.), The ecology of tropical forest tree seedlings, UNESCO/ Parthenon Publishing, ... con- centration as potential indicators of plant N nutrition in legumes and pioneer species in a rain forest of French Guiana, Oecologia 120 (1999) 171–182. [39] Roggy J C., Nic...

Ngày tải lên: 07/08/2014, 16:21

... include the thinning intensity, the stand age at the time of thinning and the time since thinning [17, 25, 39, 61]. In this work, to consider the thinning effect, the term proposed by Short and Burkhart ... Leduc and Goelz [28] achieved similar results working with loblolly pine and longleaf pine stands, respecti- vely. In fact, the evolution of dominant diameter in control...

Ngày tải lên: 08/08/2014, 00:22