نتایج جستجو برای: fallow lands and forest in central zones
تعداد نتایج: 21788340 فیلتر نتایج به سال:
A methodology to generate spatially continuous fields of tree heights with an optimized Allometric Scaling and Resource Limitations (ASRL) model is reported in this first of a multi-part series of articles. Model optimization is performed with the Geoscience Laser Altimeter System (GLAS) waveform data. This methodology is demonstrated by mapping tree heights over forested lands in the continent...
The effect of fallow on Longidorus americanus, a nematode associated with stunting of loblolly pine seedlings in Georgia, USA Stephen W. FRAEDRICH 1,∗, Michelle M. CRAM 2 and Stanley J. ZARNOCH 3 1 USDA Forest Service, Southern Research Station, 320 Green Street, Athens, GA 30602, USA 2 USDA Forest Service, Forest Health Protection, 320 Green Street, Athens, GA 30602, USA 3 USDA Forest Service,...
Clearing forests for swidden agriculture, despite providing food to millions of farmers in the tropics, can be a major driver deforestation. Payments ecosystem services schemes help stop agriculture-induced forest loss by rewarding users maintaining forests. Clear and secure property rights are key prerequisite success these payment schemes. In this study, we use novel iterative dynamic game Ma...
Changes to minor patch types in forested landscapes may have large consequences for forest biodiversity. The effects of forest management and environment on these secondary patch types are often poorly understood. For example, do early-to-mid successional minor patch types become more expansive as late successional forest types are fragmented or do they also become more fragmented in managed la...
The carbon sequestaration by plants and soil is one of the easiest and the most econimical ways to reduce atmosphere carbon. This study was conducted on the planted land use of Fraxinus rotundifolia, Cupressus arizonica, obinia pseudoacacia L., Elaeagnus angustifolia, Cedrus libani, and Quercus brantii (persica) in the Arjan plain of Fars province. For each plantation land use, there were three...
forest reserves are one of the most important approaches in ecosystem management in iran. in order to determine the effects of reserve management on plants diversity (woody plants and ground flora) in three zones (core zone, buffer zone, and transmission zone of chamhesar pear forest reserve), we mapped land form units. then 18 main sampling units (20×50=1000 m2) distributed randomly were chose...
like the adjacent areas including savojbolagh and tehran plain etc, taleghan is one of the regions susceptible to form iron age settlements at northern central part of iranian plateau. during an archaeological survey in this region in 2001, 19 zones were attributed to iron age region so that due to study on the findings resulting from this survey again, only ten of them included characteristic ...
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