نتایج جستجو برای: mixed and natural stands
تعداد نتایج: 16917246 فیلتر نتایج به سال:
magnetic resonance imaging (mri) is a notable medical imaging technique that makes of phenomenon of nuclear magnetic resonance. because of the resolution and the technology being harmless, mri has considered as the most desirable imaging technique in clinical applications. the visual quality of mri plays an important role in accuracy of medical delineations that can be seriously degraded by exi...
A critical understanding of the scientific evidence that we have about the effects of tree species diversity on ecosystem properties and processes is required to guide practical forest management as well as future research. However, current understanding is limited by the lack of an appropriate framework for evaluating the reported evidence. In this chapter we outline how research on mixed-spec...
takab-e afshar in the north – west of iran. it is in a mountainous area near the cities of dandi in zanjan, and takab in west azerbaijan, lies a complex of historical and natural properties among which stands the world heritage properties of takht-e soleyman with all its features. the present protective buffers for this site have been defined without considering the natural and cultural landsca...
land-use change has strong effects on ecosystem properties, especially on soil carbon storage and it increased global atmospheric co2. degradation and loss of area and quality of hyrcanian forests are the biggest problems in these forests. one of the most important solutions to taking care of these problems is increasing plantations in these areas. therefore, investigation of the effects of dif...
Natural regeneration is one of the key aspects of forest sustainability and a tool to decide on restoration programs in forest areas. The purpose of this study was to investigate the quantity of natural regeneration of Acer campestre L. as one of the most important tree species in Arasbaran forests and its relationship with elevation changes and structural characteristics in the natural stands....
abstract this mixed method study examines whether there is any relationship among the variables of the study (job satisfaction, social capital and motivation). the researcher considered job satisfaction and social capital as independent variables; motivation is the dependent variable of the study. the researcher applied a questionnaire to assess each variable. to measure efl teachers’ job sati...
Mixed-species forests in Fennoscandia are of increasing interest because they may improve resilience, biodiversity, and productivity. Currently there is scarce knowledge available the early growth dynamics mixed spruce–birch stands even-aged managed production with artificial regeneration spruce. The main objective our study was to examine present state past current single-storied, young (Picea...
• Extension • Research • Consulting • PHOTO 1. Boreal mixedwood stand where both aspen and white spruce are within the dominant and co-dominant crown classes. Mixed species stands provide options for creating a wide variety of future stand conditions. Forest managers are increasingly being asked to consider and apply a diversity of silviculture systems to address the variety of social, economic...
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