نتایج جستجو برای: lands areas

تعداد نتایج: 409535  

Reclamation of Arid LandsIt is our pleasure to inform you that Springer International Publisher (2017) has published a book entitled "Reclamation of Arid Lands" in English.This book is the result of joint collaboration between the University of Tehran, University of Kashan and Research Institute of Forests and Rangelands, whose authors are as follows:Mohammad Jafari: Professor, Faculty of Natur...

Journal: :IJAGR 2015
Francis Danquah Ohemeng Falguni Mukherjee

Remote Sensing and Geographic Information System was used to develop a spatial risk malaria distribution model based on environmental suitability for survival of the Anopheles gambie sp. Complex (A. arabiensis and A. gambae), the vector known to transmit malaria in Zimbabwe (Masendu, 1996). Employing geostatistical techniques, spatial analysis of environmental factors that contribute to the spr...

Journal: :کشاورزی (منتشر نمی شود) 0
حسن قهاری استادیار حشره شناسی، گروه کشاورزی دانشگاه آزاد اسلامی واحد شهرری، تهران مهرداد طبری مربی پژوهش، مؤسسه تحقیقات برنج کشور، آمل، مازندران

striped rice stem borer, chilo suppressalis (lepidoptera: pyralidae) is one of the major pests in north part of iran which causes serious damage. the last larval instar overwinters in the stem of weeds around the fields. regarding the importance of weeds as overwintering habitat, population density of larvae was studied in three areas; low-, mid-, and up-lands of mazandaran province and also on...

Journal: :پژوهش های جغرافیای طبیعی 0
مهری برومند کارشناس ارشد گروه علوم خاک، دانشگاه علوم کشاورزی و منابع طبیعی ساری مهدی قاجار سپانلو دانشیار گروه علوم خاک، دانشگاه علوم کشاورزی و منابع طبیعی ساری محمد علی بهمنیار استاد گروه علوم خاک، دانشگاه علوم کشاورزی و منابع طبیعی ساری سروش سالک گیلانی مربی گروه علوم خاک، دانشگاه علوم کشاورزی و منابع طبیعی ساری

introduction land use change and its effects on soils is one of the important factors that decrease soil quality. nowadays because of rapid growth of population, vast forest areas are changed into agricultural lands but chemical properties of the soils are commonly affected by changes in land usage.  converting the forest areas into agricultural lands is one of the prevalent issues in iran, esp...

2013
Hans Harmen Smit Erik Meijaard Carina van der Laan Stephan Mantel Arif Budiman Pita Verweij

Land degradation is a global concern. In tropical areas it primarily concerns the conversion of forest into non-forest lands and the associated losses of environmental services. Defining such degradation is not straightforward hampering effective reduction in degradation and use of already degraded lands for more productive purposes. To facilitate the processes of avoided degradation and land r...

2003
Wendel J. Hann Michael J. Wisdom Mary M. Rowland Thomas M. Quigley

Hann, Wendel J.; Wisdom, Michael J.; Rowland, Mary M. 2003. Disturbance departure and fragmentation of natural systems in the interior Columbia basin. Res. Pap. PNW-RP-545. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 19 p. We integrated landscape data from science assessments of the interior Columbia basin (basin) into one variable that func...

2013
Christopher M. Hamilton Sebastian Martinuzzi Andrew J. Plantinga Volker C. Radeloff David J. Lewis Wayne E. Thogmartin Patricia J. Heglund Anna M. Pidgeon

Land-use change around protected areas can reduce their effective size and limit their ability to conserve biodiversity because land-use change alters ecological processes and the ability of organisms to move freely among protected areas. The goal of our analysis was to inform conservation planning efforts for a nationwide network of protected lands by predicting future land use change. We eval...

Journal: :Remote Sensing 2013
Benjamin I. Cook Stephanie Pau

Pasture ecosystems may be particularly vulnerable to land degradation due to the high risk of human disturbance (e.g., overgrazing, burning, etc.), especially when compared with natural ecosystems (non-pasture, non-cultivated) where direct human impacts are minimal. Using maximum annual leaf area index (LAImax) as a proxy for standing biomass and peak annual aboveground productivity, we analyze...

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