Báo cáo lâm nghiệp: "Eighth-year response of Douglas-fir seedlings to area of weed control and herbaceous versus woody weed control" docx

... comparing Douglas-fir growth responses following complete control of woody vegetation (without control of herbaceous vegetation) to complete control of herbaceous vegetation (without control of woody ... a 2 × 2 factorial with herbaceous control as one factor and woody control as the other factor using the data base that included woody- only control, h...

Ngày tải lên: 08/08/2014, 00:22

... System. e response of weevil communities (Coleoptera: Curculionoidea) to the altitudinal zones of beech stands J. B Faculty of Forestry and Wood Technology, Mendel University of Agriculture and ... to complete the stand characteristics of selected geobiocoenoses with more zoocoenological data and to review the influence of AZ on the occurrence of weevils,...

Ngày tải lên: 07/08/2014, 03:22

... sufficiently “quiescent” to withstand the stress of being held for 14 days of priming at 20 ◦ C. Thus the TMC seeds are also likely to better withstand the stresses of handling and storage than the FI ... germination response of alder and birch seeds, Seed Sci. Technol. 33 (2005) 363−373. [10] De Atrip N., O’Reilly C., The response of prechilled alder and birch seeds to...

Ngày tải lên: 07/08/2014, 16:21

... Jones, 1992) and at canopy and regional scale (Jarvis, 1980; Jarvis and McNaughton, 1986; McNaughton and Jarvis, 1991). One approach used to determine the stomatal response to environmental ... 3 October and 26 October in FG and 19 June, 8 July, 29 July, 12 August, 3 September, 1 October and 30 October in NV) and 1992 (1 July, 23...

Ngày tải lên: 08/08/2014, 18:21

... plant cells, owing to the presence of intracellular pools of carbohydrate and to their ability to control an autophagic process can survive for a period of several days without ... and 25-27% of the cell polar lipids (Bligny and Douce, 1980), de- creased to 30% of the control value within 70 h of sucrose starvation. Similarly, t...

Ngày tải lên: 09/08/2014, 04:20

... the way of sharpening must correspond to the required performance of a circu- lar saw and to the quality of machined surface. ey must be released according to the type of workpiece (soft, hard ... devices and the process of result analysis are described in detailed. Knowledge of the wood crosscutting process and choice of suitable cutting conditions and cuttin...

Ngày tải lên: 07/08/2014, 03:22

... the data in terms of potential damage to forest stands by pol- lutants, and for definition of the risk area bounda- ries. Parallelly we used the same method in a beech stand (stand density 0.7) ... identification and analysis of the impact of proton load (H + ) and ground level ozone (O 3 ) on beech stands differentiated by the intensity of the applied cut. e modelled...

Ngày tải lên: 07/08/2014, 03:22

... of MgO and Devarda’s alloy, and the released NH 3 was collected in an indicator solution of H 3 BO 3 .  e concentrations of NH 4 + -N and NO 3 – -N were de- termined by titration with standard ... Inorganic forms of N availability in soil  e total content of C and N in the examined soils (Table 3) is in the range of these values 1.94–7.60% and 0.181–0.594%, respec...

Ngày tải lên: 07/08/2014, 10:21

... temperature and humidity in order to carry out the maxi- mum photosynthesis, and this tends to be during the spring and part of the autumn. During and after the appearance of shoots, the plant discards ... The results of all these kinds of studies can be applied to cork-oak forest man- agement in response to climatic change. The aim of our paper is to statistical...

Ngày tải lên: 07/08/2014, 16:20

... μH and μV are the horizontal and vertical scaling factors, re- spectively, and μ0H and μ0V are the scaling factors at the centre of the image. We used a digital photograph of scaled paper to ... projection of the tree profile onto the plane of the photographs. The straightness of the stem is then expressed by the angle of lean and sums of squared devi- ation to diffe...

Ngày tải lên: 07/08/2014, 16:21