نتایج جستجو برای: in khorasan province
تعداد نتایج: 16982386 فیلتر نتایج به سال:
abstract over the last fifty years, most of the semi-arid rangeland in iran has been converted to cropland without an equivalent reduction in grazing animals. this shift has led to heavy grazing pressure on rangeland vegetation. the present study has been conducted in sisab research station in the north khorasan province to evaluate effects of long-term grazing exclosures on biodiversity of ran...
Background and purpose: Sand flies are widespread in Iran and are vectors of leishmaniasis and pappatci fever in most parts of the country including Southern Khorasan Province. Faunistic and ecological studies of these flies are necessary in order to implement proper vector control programs. This research was conducted to determine the sand flies fauna in Southern Khorasan province. Materials ...
khorasan razavi province with the total precipitations of less than 225 mm/year and total area of irrigated area of 1087466 hectare is considered as one of the most important agricultural region in iran. this province has also important role in local and national economy. lack of perennial river and little amount of surface water has caused 1.06 billion cubic meter of over withdrawn from ground...
the spiders of iran are still very incompletely known. as a result of the study of spider fauna in different localities of khorasan province and other studies which have been done by other workers a total of 26 families, 63 genera and 95 species are recorded from these areas. distribution in khorasan province and in the world, field and some taxonomic notes are given for each species. available...
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