نتایج جستجو برای: canopy cover percentage

تعداد نتایج: 254028  

ژورنال: مرتع 2021
Bagheri, Setareh, Jafari, Mohammad, Malekian, Arash, Peyrvand, Vahid, Tamartash, Reza, Tatian, Mohammadreza,

Using satellite imagery is a reasonable option to overcome the field visits problems and limitations to evaluate the vegetation cover over the years. The present research has conducted to specify the percentage of vegetation cover of rangelands using Geographic Information System (GIS) and vegetation indices. The study area is located in Qazvin plain rangelands, Iran. In this study, the MODIS s...

Journal: :Journal of environmental quality 2016
Ruzana Sanusi Denise Johnstone Peter May Stephen J Livesley

Maintaining human thermal comfort (HTC) is essential for pedestrians because people outside can be more susceptible to heat stress and heat stroke. Modification of street microclimates using tree canopy cover can provide important benefits to pedestrians, but how beneficial and under what circumstances is not clear. On sunny summer days, microclimatic measures were made in residential streets w...

Journal: :مرتع و آبخیزداری 0
ولی الله رئوفی راد دانشجوی کارشناسی ارشد مرتعداری دانشگاه شهرکرد عطاالله ابراهیمی استادیار دانشکدة کشاورزی دانشگاه شهرکرد حسین ارزانی استاد دانشکدة منابع طبیعی دانشگاه تهران زهرا شجاعی اسعدیه استادیار دانشکدة کشاورزی دانشگاه شهرکرد

palatability includes plants physical and chemical property that encourages an animal selecta plant for grazing. this study is an attempt for intruducing an indicator for determining thepalatability of rangeland plants. to do this, the relationship between palatability and foragequality of rangeland plants in karsanak rangelands of the chaharmahal-va-bakhtiari provincewas studied. first, plant ...

The study of  vegetation dynamics under grazed and non-grazed rangelands is one of the most important prerequisites for range improvement. In this research, vegetation composition and the vegetation functional groups were compared in an exclosure site (livestock excluded for six years) and grazed area in semi-steppe rangelands in Tehran province. Systematic random sampling technique through the...

Journal: :environmental resources research 2014
javad gholami tabasi mohammad jafary hossein azarnivand mahdi sarparast

planting shrub seedlings under oil mulches has frequently been used for stabilizing mobile sands in iran for during the last three decades. sandy desert of samad abad, sarakhs, northeast iran, has been fixed by cultivating seedling of haloxylon aphyllum under the oil mulches. therefore this study was designed to investigate the effects of the sand fixation project on soil and vegetation propert...

One of the most suitable and efficient solutions for proper use of flood potential and saline ephemeral rivers in arid and desert areas is the use of flood spreading networks with a special design that while separating the saline base flow from the flood, water also increases forage production and improves the quantity and quality of pastures and desertification control. The purpose of this stu...

Planting shrub seedlings under oil mulches has frequently been used for stabilizing mobile sands in Iran for during the last three decades. Sandy desert of Samad Abad, Sarakhs, northeast Iran, has been fixed by cultivating seedling of Haloxylon aphyllum under the oil mulches. Therefore this study was designed to investigate the effects of the sand fixation project on soil and vegetation propert...

Ali Tavili, Ghassem Assadian Mohammad Jafari Mohsen Mohseni Saravi, Nasrin Kolahchi

Vegetation cover is the first barrier for the raindrops resulting to the interception and infiltration loss. Interception as one of the main components of ecohydrology equation plays a major role in the water balance of rangelands. However, few studies have been done on the interception of rangeland plants in Iran. This study was carried out to find the interception rate in Astragalus parrowian...

Journal: :چغندرقند 0
کیوان فتوحی مربی پژوهشی مرکز تحقیقات کشاورزی و منابع طبیعی آذربایجان غربی

understanding the relationship between root yield and other traits in sugar beet may be a crucial step towards successful breeding of this important crop. path analysis provides a useful method in analyzing the genetic and phenotypic coefficients of correlations. this method is able to effectively unveil direct and indirect effects among traits of interest. in this research, root yield, yield c...

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Eco-cover is ecological mulch and its application is an eco-friendly and low-cost method to improve soil environment and prevention of unwanted plants. The aim of this study was to investigate the effects of eco-cover on unwanted plants, Vetiver grass (Chrysopogon zizanioides) growth and soil Properties. For this purpose, two series of rectangular plot (with and without eco-cover), in three rep...

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