Báo cáo lâm nghiệp: "About the benefits of poststratification in forest inventories" potx

Báo cáo lâm nghiệp: "On the occurrence of web-spinning sawflies of the genus Cephalcia (Hymenoptera, Pamphiliidae) in the Czech Republic" potx

... 57–62Because of the lack of a recent survey of Cephal-cia species in the Czech Republic, the goals of this study were (i) to monitor web-spinning sawﬂies liv-ing on spruce in mountainous regions ... species occurrence. Canonical axes explain 65.8% of variability J. FOR. SCI., 53, 2007 (Special Issue): 57–62 59Table 1. Survey of studied web-spinning sawﬂies of the genus Cephalcia in the Czech ... periods of the Cephalcia species ﬂight activities (cf. M- 1988). e ﬂight activity started in the stud-ied localities at the end of May or at the beginning of June depending on the actual...

Báo cáo lâm nghiệp: "About the benefits of poststratification in forest inventories" potx

... (1 n/N) ì 2/n, independently of the original dis-tribution of the variable of interest. Here, although the estimate of the true mean is unbiased and the variance of the mean decreases ... samples of size 100, 32 of size 110, and 4 of size 121. In sampling a nonrectangular area, variability of the sample size will further be increased depend-ing on the irregularity of the particular ... 139JOURNAL OF FOREST SCIENCE, 53, 2007 (4): 139–148 Poststratification is well known as a means of increasing the precision of estimates in unstratiﬁed sampling by incorporating additional information...

Báo cáo lâm nghiệp: "Production and humus form development in forest stands established on agricultural lands – Kostelec nad Černými lesy region" potx

... the Ministry of Agriculture of the Czech Republic, Research Project No. QG 50105.Production and humus form development in forest stands established on agricultural lands – Kostelec nad Černými ... composition). e study was performed in the stands of four tree species on aﬀorested agricul-tural lands, in a neighbouring forest stand on con-tinuously forested land (mixed Scots pine – Norway ... were registered in the Douglas ﬁr stand again, visibly lower in the pine and spruce stands on the agricultural lands and the lowest on the old forest soil. In the mineral horizons, the arable...

Báo cáo lâm nghiệp: "Optimising the management of even-aged Pinus sylvestris L. stands in Galicia, north-western Spain" ppt

... thinningintensity depends on the number of the thinning, the intensityincreasing from the ﬁrst thinning to the fourth. The intensity of the ﬁrst thinning is around 20% of basal area, and in the ... (% of number of trees);◦ Percentage of low thinning (% of trees removed after system-atic thinning).– For the other thinnings◦ Number of years since the previous thinning;◦ Percentage of ... systematic thinning (% of number of trees);◦ Percentage of low thinning (% of trees removed after system-atic thinning).– For ﬁnal felling◦ Number of years since the last thinning. The number of optimized...

Báo cáo lâm nghiệp: " A dendroecological reconstruction of disturbance in an old-growth Fagus-Abies forest in Slovenia" docx

... dendroecological reconstruction of disturbance in an old-growth Fagus-Abies forest in SloveniaThomas A. Nagel a *,TomLevanicb,JurijDiaci a aUniversity of Ljubljana, Biotechnical Faculty, Department of ... depth can vary between 30 and 70 cm depend-ing on micro-topographic position. The climate is a combination of continental and Mediterranean, with an annual precipitation of ca.1400 mm and mean ... Disturbance history of an old-growth forest 897[28] Nagel T .A. , Svoboda M., Diaci J., Regeneration patterns after in- termediate wind disturbance in an old-growth Fagus-Abies forest in southeastern...

Báo cáo lâm nghiệp: " Optimising the management of uneven-aged Pinus sylvestris L. and Pinus nigra Arn. mixed stands in Catalonia, north-east Spain" pps

... 747758â INRA, EDP Sciences, 2005DOI: 10.1051/forest:2004071Original article Optimising the management of uneven-aged Pinus sylvestris L. and Pinus nigra Arn. mixed stands in Catalonia, north-east ... The effect of discounting rate and length of the cutting cycleon the optimal management of mixed stands of P. sylvestris and P. nigra mixed stands was clear. With a 10-year cutting cycle the ... mixtures of Pinus sylvestris L. and Pinus nigra Arn. in Catalonia, north-east Spain, Ann. For. Sci. 61 (2004) 9–24.[38] Valsta L., A comparison of numerical methods for optimising even-aged stand management, ...

Báo cáo lâm nghiệp: "Optimising the management of Pinus sylvestris L. stand under risk of fire in Catalonia (north-east of Spain)" ppsx

... stand age when the first thinning occurs; years sinceprevious thinning for the other thinnings; remaining basal area.For the final cutting: years since the last thinning to the first regen-erative ... 493501â INRA, EDP Sciences, 2005DOI: 10.1051/forest:2005054Original articleOptimising the management of Pinus sylvestris L. stand under risk of fire in Catalonia (north-east of Spain)José ... [18]. In this study we use a simulation-optimisation system,SPINE [19], to examine the effect of risk of fire on the optimaleven-aged management of Scots pine (Pinus sylvestris L.) stands in Catalonia...

Báo cáo lâm nghiệp: "Modeling the impact of thinning on height development of dominant and codominant loblolly pine trees" pot

... growth of dominant and codominant loblolly pine trees, the mean value of total height of dominant and codominant trees was calculated for each unthinned and once thinned stand at each location (site) ... right hand side of Equation (8) for agiven set of variables. The integral of Equation (8) can also becomputed online [16].4. CONCLUSIONSThis study shows that height growth of dominant and codominant ... is the stand age, Atis the stand age at the time of thinning (A > At), and r is the rate parameter corresponding to thinning response. In orderto account for the thinning response in the...

Báo cáo lâm nghiệp: " Ranking the importance of quality variables for the price of high quality beech timber (Fagus sylvatica L.) ppt

... with the models rather than artefacts. A ranking of the importance of the timber quality variables on the basis of both models there-fore seemed acceptable.Among the quality variables the red ... explain timber prices achieved for high quality beech timber (Fagus sylvatica L.). The modelling starts with the assumption that among other variables, the buyers’ preference determines the level of ... context the paper presents such price models for high quality beech timber. A new modelling approach was used for ranking the importance of timber quality variables. 2. THEORETICAL APPROACH, HYPOTHESESAND...

Báo cáo lâm nghiệp:"Predicting the probability of seed germination in Pinus sylvestris L. and four competitor shrub species after fire" doc

... hightemperatures favoured the germination of Genista florida.Therefore, a balance between the elimination of competitor shrub species and the stimulation of the germination of Pinus sylvestris seeds must be ... 2002076Original articlePredicting the probability of seed germination in Pinus sylvestris L. and four competitor shrub species after fireMê Rosario Nuñeza, Felipe Bravoa and Leonor Calvob*a ... probability of germination was studied in the laboratory for Scots pine (Pinus sylvestris) and four shrub species characteristic of the understory in Scots pine stands in northern Spain (Cistus laurifolius,...

Báo cáo lâm nghiệp:"Optimising the management of Scots pine (Pinus sylvestris L.) stands in Spain based on individual-tree models" potx

... 10.1051/forest:2003002Original articleOptimising the management of Scots pine (Pinus sylvestris L.) stands in Spain based on individual-tree modelsMarc Palahía* and Timo Pukkalab a European Forest Institute, ... simulation-optimisation system, SPINE, for the management of Pinus sylvestris L. stands in Spain. The simulation sub-system is based on an individual-tree diameter growth model, a static individual-tree ... expectation value with 1, 2 and 3 percentdiscounting rate. Optimising the management of Scots pine stands in Spain 1072.1.3. Simulation of thinnings and regenerative cuttings The simulation sub-system...

Báo cáo lâm nghiệp: "Assessing the potential of natural woody species regeneration for the conversion of Norway spruce plantations on alluvial soils" doc

... In the perspective of the conversion of Norway spruce plantations, there is a need for foresters to assess the potential of the natural woody species regeneration. We studied 50 Norway spruce plantations ... natural woody species regeneration for the conversion of Norway spruce plantations on alluvial soilsBruno HÉRAULTa*, Daniel THOENa, Olivier HONNAYba Department of Environmental Sciences ... competi-tion on the growth of seedling of four tree species on a range of soil,Q. J. For. 73 (1979) 160–171.[28] Hérault B., Bouxin G., Thoen D., Comparison of the regeneration patterns of woody species...

Báo cáo lâm nghiệp: "On the durability of Burkea africana heartwood: evidence of biocidal and hydrophobic properties responsible for durability" ppt

... by measuring the diameter of the colony estimated from the mean of two perpendic-ular diameters and expressed as a percentage of the room available for growth, i.e. the diameter of the dish. Growth ... Independently of the nature of the extraction, weight losses observed on Burkea africana blocks are weak, while beech blocks arestrongly degraded. These results suggest that the durability of Burkea africana ... effects of the different extractson the growth of brown rot and white rot fungi. In all cases, asignificant effect was observed on the growth of the myceliumat 100 and 1000 ppm of the different...

Báo cáo lâm nghiệp: " Modelling the influence of winter frosts the development of the stem canker of red oak, caused by Phytophthora cinnamomi" doc

... furthersupport to the hypothesis that winter frostis the meteorological variable limiting the distribution of the disease. The most ...

Báo cáo lâm nghiệp: "Production and characterization of exocellular in ectomycorrhizal fungi proteases" pps

... induced in beech-Lactarius ectomycorrhizas incubat-ed in the presence of litter proteins.Gelatin was less efficient and ammoniumrepressed the excretion after 48 h of incubation. ... grown in shaken cultures at 25°C in Pachlewski’s medium containing nitrogen aseither diammonium tartrate or proteins: bovineserum albumin (BSA), gelatin, casein or pro-teins ... the fungi and protease activities detected in mycorrhiza-forming fungi were reported by Lyr (1963) and Ramstedt and S6derhall (1983). In this study, the process of production...

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Từ khóa: báo cáo lâm nghiệp objectives after finishing the lesson students ss will be able to write a short paragraph about the benefits of the internet we re going to write a passage about the benefits of the internet lesson students will be able to write a passage about the benefits of the internet in about 140 words write a paragraph about the benefits of playing sports every day write a passage about the benefits of the internet in people s life articles about the role of music in our lives write an essay about the importance of music in your life quotes about the importance of communication in the workplace facts about the fountain of youth in st augustine promising methods for assessing the benefits of handwashing in consumers novel concepts about the role of lectins in the plant cell talk about the position of furniture in a room using prepositions objective by the end of the lesson students will be able to tell about the numbers of items in their house gt giáo viên giới thiệu bài mới today we are going to read a passages about the important of music in our lives you read them and do the following tasks Nghiên cứu tổ chức pha chế, đánh giá chất lượng thuốc tiêm truyền trong điều kiện dã ngoại Một số giải pháp nâng cao chất lượng streaming thích ứng video trên nền giao thức HTTP đề thi thử THPTQG 2019 toán THPT chuyên thái bình lần 2 có lời giải Giáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôit Giáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôit Phối hợp giữa phòng văn hóa và thông tin với phòng giáo dục và đào tạo trong việc tuyên truyền, giáo dục, vận động xây dựng nông thôn mới huyện thanh thủy, tỉnh phú thọ Nghiên cứu, xây dựng phần mềm smartscan và ứng dụng trong bảo vệ mạng máy tính chuyên dùng Nghiên cứu về mô hình thống kê học sâu và ứng dụng trong nhận dạng chữ viết tay hạn chế Nghiên cứu tổng hợp các oxit hỗn hợp kích thƣớc nanomet ce 0 75 zr0 25o2 , ce 0 5 zr0 5o2 và khảo sát hoạt tính quang xúc tác của chúng Thiết kế và chế tạo mô hình biến tần (inverter) cho máy điều hòa không khí Sở hữu ruộng đất và kinh tế nông nghiệp châu ôn (lạng sơn) nửa đầu thế kỷ XIX Tổ chức và hoạt động của Phòng Tư pháp từ thực tiễn tỉnh Phú Thọ (Luận văn thạc sĩ)Tăng trưởng tín dụng hộ sản xuất nông nghiệp tại Ngân hàng Nông nghiệp và Phát triển nông thôn Việt Nam chi nhánh tỉnh Bắc Giang (Luận văn thạc sĩ)Giáo án Sinh học 11 bài 15: Tiêu hóa ở động vật Nguyên tắc phân hóa trách nhiệm hình sự đối với người dưới 18 tuổi phạm tội trong pháp luật hình sự Việt Nam (Luận văn thạc sĩ)Giáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vật Giáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vật Giáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vật Trách nhiệm của người sử dụng lao động đối với lao động nữ theo pháp luật lao động Việt Nam từ thực tiễn các khu công nghiệp tại thành phố Hồ Chí Minh (Luận văn thạc sĩ)Chiến lược marketing tại ngân hàng Agribank chi nhánh Sài Gòn từ 2013-2015