Báo cáo lâm nghiệp: " Possibilities of using the portable falling weight deflectometer to measure the bearing capacity and compaction of forest soils" pptx
Báo cáo lâm nghiệp: " Possibilities of using the portable falling weight deflectometer to measure the bearing capacity and compaction of forest soils" pptx
... discusses possibilities of using the portable falling weight deflectometer to measure the bearing capacity and compaction of forest soils. Within the study, measurements were made using manual ... available to root hairs and pores under 0.001 mm are not inhabitable even by micro- Possibilities of using the portable falling weight deflectometer to measure the bearing capacity and compaction of ... mini-mum of two to three measurements at each site. The goal of the present paper was to assess a possibility of using the portable falling weight de-flectometer for measuring the bearing capacity and...
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Báo cáo lâm nghiệp: " Possibilities of using rooted cuttings of European beech (Fagus sylvatica L.) for stabilisation of forest ecosystems" pptx
... planting into a forest stand was evident from the comparison of variant 2 and 3, i.e. rooted cuttings with different levels of nutrition in the nursery. In the majority of the years of observa-tion ... of examining the growth of rooted cuttings of beech after they were planted onto permanent forest sites. Data on the growth of rooted cuttings of beech five years after planting compared to ... Krkonoše Mts. and in the Trutnov area. On some PRP it was possible to compare the growth of rooted cuttings of beech with the planting material of beech of genera-tive origin. As the size of plantations...
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Báo cáo lâm nghiệp: "Ground based operation effects on soil disturbance by steel tracked skidder in a steep slope of forest" ppt
... the United States. In: e Contribution of soil sci-ence to the development of and implementation of criteria and indicators of sustainable sorest management. No. 53, Soil Science Society of ... the litter mass in that area. Rut depths were measured in the same points of soil samples, a wooden rod was laid across the rut and the distance from the ground surface to the underside of ... skidding; hardwood forest of Iran; soil compaction 282 J. FOR. SCI., 56, 2010 (6): 278–284travel speed and the power of the machine are lim-ited and accrued rutting and mixing of mineral soil...
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Báo cáo lâm nghiệp: "Multifunctional forestry practices as a land use strategy to meet increasing private and public demands in modern societies" ppt
... management practices. To assess the present and future options in management of forests, one has to be aware of the historical context. Shaped by the past, today’s forest stands offer mul-tiple ... sustainable forestry means the ability of landowners and forest enterprises to produce wood, to care for infrastructural services, and to provide environ-mental services for the benefit of present and ... to the needs and values of modern societies take into ac-count the forest as a multifunctional resource, the specificity of a wide range of ecosystems, the need to maintain biodiversity, and...
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Báo cáo lâm nghiệp:"Succession from bog pine (Pinus uncinata var. rotundata) to Norway spruce (Picea abies) stands in relation to anthropic" docx
... Favre and Thiébaud [14], Richard [45] and Bartolomé [2] indicate the decline of the pine woodlandsurface in the middle of the bog and the concomitantcentripetal spreading of the spruce woodland ... bog pine to Norway spruce stands 351Table I. Vegetation tabular of the phytocoenotic relevés and their synusial relevés in the bog pine stand of phytocoenosis No 1 and in the bogpine and Norway ... (a) Favre and Thiébaud [14], (b) Richard[45] and (c) Bartolomé [2], showing the decline of the pine woodlandarea in the middle of the bog and the concomitant centripetalspreading of the spruce...
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Báo cáo lâm nghiệp: "Current possibilities of using Norway spruce (Picea abies [L.] Karst.) in forest regeneration in the air-polluted region of the northeastern Krušné hory Mts" doc
... referred to as the stands of substi-tute species (SSS). In the 1970s and 1980s, more than 30,000 ha of SSS were established in the region concerned.Since the coming into existence of the stands of ... Bohemian-Moravian Upland) and stands on the mechanically drained GFTs 7R and 8G. Results show that the growth of Norway spruce in the Krušné hory Mts. on these groups of forest types is identical to that ... corresponding total height).– Neither the total height nor the increments of young plantations on large-sized clearcuts in the Krušné hory Mts. attain the values of control plots, yet the results of the...
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Báo cáo lâm nghiệp: "Initial evaluation of half-sib progenies of Norway spruce using the best line" potx
... vector, and estimates of G and R, the BLUP proce-dure provides the best linear unbiased estimator (βˆ ) of β and the best linear unbiased predictor (uˆ ) of u. e predictors are solutions to the ... respect to the distribution of Y) is equal to the expected value of the quantities being estimated, and third, they are the best in the sense of having the minimum mean square error within the ... REML method is restricted to the random component of the model. REML procedure consists of a search through the entire range of parameter space and the computation of the log-likelihood for each...
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Báo cáo lâm nghiệp: "Measurement of free shrinkage at the tissue level using an optical microscope with an immersion objective: results obtained for Douglas fir (Pseudotsuga menziesii) and spruce (Picea abies)" potx
... waterwith the immersion objective, and the “deformed” image being that of the test pattern taken using the standard objective. The “deforma-tion” measured under these conditions on the pairs of images ... translation of the zoomed zone, with automatic updating of the two chains of reference points, etc.Indeed, some of the reference points chosen on the initial imagewere either difficult to detect ... ε11 and ε22are the two parame-ters sought: they represent the shrinkage values in directions x and y,respectively, and thus in directions R and T or T and R, depending on the orientation of the...
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Báo cáo lâm nghiệp: "An approach for the analysis of vegetation spectra using non-linear mixed modeling of truncated power spectra" pdf
... standard deviation of each of the three random effects (Tab. II) relative to theirassociated fixed effects provides a measure of their relativeimportance. Although one or sometimes two random ... relationship between the frequency and the frequency-specificvariance of the reflectance:Exp (3)where is the variance of the reflectance of the jth foliagesample in the ith group (treatment ... choice of r–1 degrees of freedom in the numerator of the F-ratio test instead of 2 was adopted to keep the experiment-wide error rate at 0.05 or better [38]. The number of retained frequencies...
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