搜索结果: 211-225 共查到“林学 Forest”相关记录643条 . 查询时间(0.15 秒)
Economic evaluation of natural forest park using the travel cost method (case study; Masouleh forest park, north of Iran)
willingness to pay recreational value
2015/5/5
We evaluated recreational and socioeconomic values of Masouleh forest park, north of Iran. Travel Cost
Method (TCM) or Clawson method was used for evaluation. Therefore, 96 questionnaires were distr...
Forest management and snag characteristics in Northern Iran lowland forests
biodiversity broadleaved forests
2015/5/5
Some snag characteristics were studied in three different Hyrcanian lowland forests. The highest snag
density (38.4 stem·ha–1) was found in fully protected forests, and it was significantly higher t...
Stakeholders’ preferences and the assessment of forest ecosystem services: a comparative analysis in Italy
ecosystem values environmental attitudes
2015/5/5
Values are qualities and beliefs orientating human actions and they change according to socio-economic
variables such as gender, culture, education and income.
Forest fires and their causes in the Czech Republic (1992–2004)
fire risk preventive measures occurrence burnt area season frequency
2015/4/24
Forest fires under conditions of the Czech Republic are evaluated from the aspect of their frequency of occurrence in 1992–2004 at a level of particular years, seasons, days and daytime, and causes of...
Norway spruce litterfall and forest floor in the IUFRO thinning experiment CZ 13 – Vítkov
forest-floor layers litterfall Norway spruce thinning
2015/4/24
The effect of thinning on litterfall and decomposition of biomass was investigated in Norway spruce IUFRO thinning experiment (CZ-13), Czech Republic. The experiment was established in 1971 in an 8-ye...
Research on reliability of forest harvester operation used in the company Lesy Slovenskej Republiky
reliability forest machines maintenance harvester
2015/4/24
The paper deals with reliability of forest harvesters. They are quite modern and helpful in the process of tree felling. The quality of felling is important for the further quality of wood used in woo...
Stand structure indices as tools to support forest management: an application in Trentino forests (Italy)
stand complexity species diversity diametric differentiation index mingling index contagion index composite stand index
2015/4/24
Stand structure and species diversity are two useful parameters to provide a synthetic measure of forest biodiversity. The stand structure is spatial distribution, mutual position, diameter and height...
Foliar nutrient status of a natural fir forest in Greece
critical values nutrient N percentages
2015/4/24
The foliar nutrient status was examined in a degraded Greek fir (Abies cephalonica Loud.) forest in Mount Parnitha near Athens, Greece. The examination lied in comparing the foliar concentrations of C...
Forest visitors’ opinion of recreational facilities and trails in forests in the Blaník Protected Landscape Area – a case study
opinion of recreational facilities forest trails visitors’ profile visitors’ preferences questionnaire survey Czech Republic
2015/4/24
Currently, recreation is the most common use of protected areas and there are scarce data on the users and their opinion. The research was focused on visitors to the Blaník Protected Landscape Area (h...
Ground vegetation as an important factor in the biodiversity of forest ecosystems and its evaluation in regard to nitrogen deposition
forest monitoring nutrificiation nitrophilous species vegetation diversity
2015/4/24
We documented the current typological and phytosociological characterisation of the ground vegetation as an essential component of biodiversity in 154 Czech forest monitoring plots and to describe its...
The impact of juvenile tree species canopy on properties of new forest floor
afforestation agricultural land forest floor topsoil nutrients
2015/4/24
To keep forest soils fertile, forest practitioners plant mixed stands that are composed of both economically efficient trees such as conifers and soil-improving broadleaves. This is a mandated practic...
Spatial-temporal distribution of forest fires and fire weather index calculation from 2000 to 2009 in China
Sanming spatial-temporal distribution CFFDRS
2015/4/24
This paper describes the forest fire dynamics in the city of Sanming in Fujian province, China, from 2000 to 2009 with a view to understand the number of fires and burned areas in different counties. ...
Productivity and cost analysis of skidding with Timberjack 450C in forest plantations in Shafaroud watershed, Iran
forest operation wood extraction skidder time study Iran
2015/4/24
We present research results of timber skidding by a Timberjack 450C skidder in the path cutting of pine trees in Shafaroud watershed. Time studies were conducted to quantify the productivity and perat...
Long-term response of understorey cover, basal area and diversity to stand density in a mixed oak forest on the Síkfőkút plot in Hungary
Quercus cerris shrub layer Acer campestre Shannon-Wiener index Evenness index shrub foliage cover
2015/4/24
The serious oak decline was reported for the 1979–80 period and 63.0% of adult oaks died in a mixed oak forest in the Síkfőkút site, Hungary. The data were used to obtain (1) quantitative informa...
Partial evaluation of questionnaires monitoring the need of knowledge in forest workers from selected EU countries
European forest worker eligibility subject area of physics theoretical knowledge practice certification
2015/4/24
The paper informs about partial results gathered and processed in the framework of the international research project “Learn for Work”, Leonardo da Vinci programme. The goal of the research project wa...