Báo cáo lâm nghiệp: "Department of Forest Establishment and Silviculture, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic" pot

... Establishment and Silviculture, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic ABSTRACT: The paper summarizes results from the analyses of Norway spruce ... development and health condition of the root system in Norway spruce af- fected by the decline and yellowing of assimilatory apparatus in forest stand...

Ngày tải lên: 07/08/2014, 10:21

... power of woodcutting process by circular saws J. K, M. M Department of Forest and Mobile Technology, Faculty of Environmental and Manufacturing Technology, Technical University in Zvolen, ... 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 bit higher. e cutting...

Ngày tải lên: 07/08/2014, 03:22

Ngày tải lên: 07/08/2014, 16:20

... 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 ... abies 1. INTRODUCTION The commercial value of logs for processing into solid wood is mainly determined by the size and straightness of the tree stem, and the number and...

Ngày tải lên: 07/08/2014, 16:21

... followed by afforestation and reforestation of former agricultural areas with a net increase of 14.9% of the forest area in Italy during the last fifty years [14]. In particular, the climatic and edaphic ... are the same of Table IV. SS is the sum of squares for error in arithmetic unit. In this case a and b and the coefficient of determination (R 2 ) were calcul...

Ngày tải lên: 08/08/2014, 00:22

... from earlywood to latewood regardless of index value and not the inverse. Therefore, when dividing a tree ring into E and L zones, the aim of this method will be to classify cells in a radial ... (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 tree ring...

Ngày tải lên: 08/08/2014, 00:22

... at generating haploid lines of Poplar species for genetic manipulation and breeding programs K.E. Wolter B.H. McCown Department of Horticulture, University of Wisconsin, Madison, ... making monitoring extremely difficult. Discussion and Conclusion The conclusions from the results obtained to date are that production and mainte- nance of haploid t...

Ngày tải lên: 09/08/2014, 04:20

... tube. Stream lines may appear irregular and fractal, reflecting the constrictions and enlarging nodes of the settling particles and cells (Batchelor, 1967). Rings on eitheir side of ... created by inanimate particles settling in the fluid (cf. Fig. 1 A-E). In suspension cultures, where viscosity is increased by high levels of sucrose, myoino...

Ngày tải lên: 09/08/2014, 04:20

... School of Life Sciences, Tohoku University, Aoba, Sendai, Japan 2 Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic 3 Department of Mathematical ... required in forest operations, stipulate a non-declining, even fl ow of timber. Such constraints refl ect one interpretation of “sustainable timber supply” and...

Ngày tải lên: 07/08/2014, 10:21

... Predic- tion of stand basal area with forecast combination. Journal of Beijing Forestry University. (in press) Z Y., M C.S., W K. (2006): e study of estimation of weight coefficient in combination ... Techniques, Chinese Academy of Forestry, Beijing, China ABSTRACT: Stand growth and yield models include whole-stand models, individual-tree models and diameter-distr...

Ngày tải lên: 07/08/2014, 10:22