Báo cáo lâm nghiệp: "Forest storm damage is more frequent on acidic soils" pot
... situation, but at least on a regional scale, then storm damage can be expected to occur more often on acidic soils. We therefore hypothesised that storm damage would be more frequent on sites ... susceptible to storm damage ([10, 40], this study). Thus it is possible that storm damage is not related directly to low soil pH, but is only more frequent in...
Ngày tải lên: 08/08/2014, 00:21
... el - evation above sea level and forest composition. (2) Severity of damage caused by small mammals. In this section we asked for information on the extent of damage in the locality, if the damage ... characteristics of vegetation of severely damaged plots. (3) Control of damage caused by small mammals. Information gathered in this section regarded methods for a reduction of d...
Ngày tải lên: 07/08/2014, 03:22
Ngày tải lên: 08/08/2014, 01:22
Báo cáo lâm nghiệp: "Forest visitors’ opinions on the importance of forest operations, forest functions and sources of their financing" docx
... Climate Health-hygienic Nature production production function protection protection function protection function function function function function 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Timber ... information environment in CR. e opinion on forest operation importance is though incompatible with the visitors’ opinion on the coverage of increased costs of non-market for- est functi...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Forest yield index and its applicability to the assessment of future forest yields" docx
... strategic forest management decision-making are discussed, considering the uncertainty of ecological and economic conditions during the long forest production cycle, as well as the complexity ... production), value (price of production) or revenue (yield from realization of production), using already existing models. Long-term research of growth processes in Slovakia finished by publishi...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Forest watershed runoff changes determined using the unit hydrograph method" pps
... water is stored due to increased soil retention and then it is released reaching the stream in a long travel time since more distant source areas are involved. CONCLUSION e results confirm ... the only difference is the level of the values. 60-hour hydrographs showed the same response to precipitation compared to both the above-mentioned shorter ones. e form of the rising limb...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Forest transport roads according to natural forest regions in the Czech Republi" pps
... evalua- tion done in this way (division of the Czech Republic) is original and untypical. Such evaluation is usable in conditions of the Czech Republic and may be used for the evaluation of other ... should not rise up to 12%. is definition includes the description of both forest roads 2L 1 and forest roads 2L 2 , used by the Forest Management Institute. For this reason, this divis...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Effects of drought and heat on forest insect populations in relation to the 2003 drought in Western Europe" ppt
... forest damage. This paper reports on the impacts of drought and high temperatures on forest insect populations in the context of this exceptional event. Observations of changes in population levels ... temperature on the dis- tribution of forest insects has been well documented (e.g. [6, 7, 9, 15, 41, 86]). The geographic distribution of many forest insects is more limited than the...
Ngày tải lên: 07/08/2014, 16:20
Báo cáo lâm nghiệp: "C and 15 N isotopic fractionation in trees, soils and fungi in a natural forest stand and a Norway spruce plantation" pps
... fungi sporophores. Ammonification usu- ally causes a small fractionation (+ or – 1%) between soil or- ganic N and ammonium [37,40]. This small fractionation due to ammonification cannot explain a ... glycine but did display significant fractionation against 15 N-ammonium. This ammo- nium fractionation probably occurred during uptake. However, it is very likely that the fractionation occurred...
Ngày tải lên: 07/08/2014, 16:21
Báo cáo lâm nghiệp: "Predicting stand damage and tree survival in burned forests in Catalonia (North-East Spain)" pot
... 0.6 0.8 1 Decision criterion Correct predictions, % Equation (3) Equation (4), observed damage Equation (4), predicted damage Figure 6. Percentage of correct predictions as a function of predicted survival ... generate more variation in stand-level results if a stochastic component corresponding to the residual variation of the stand level model is added to the prediction. If the whol...
Ngày tải lên: 07/08/2014, 16:21