This paper has been attempted to compare the effect of market sale and contract strategies on yield, using a 90 survey data from tomato farmers in Khorasan-Razavi province, Iran on 2007 and applying the game theory approach. The results showed that the effect of no-contract strategy with tomato processing factories is more than contracted strategy on tomato yield in farm level. With respect to ...

water shortage crisis is an issue that has led to drastic changes in different agricultural policies, especially in arid and semi-arid areas. uncertainty in the amount of resources, e.g. water, used for agricultural production entails risk for farmers' income and cropping pattern changes. in the present study, the robust optimization model was used for optimal allocation of arable lands of khor...

We have described a new case of accidental intestinal myiasis that had occurred due to Eristalis tenax in Iran. A 4-year-old girl living in rural area near Bajestan city located in the south of Khorasan Razavi province visited the hospital lab with complaints of one live larva in feces and did not have other symptoms, except anal itching. This case had a history of consuming subterranean villag...

BACKGROUND Ectoparasites of mammalian hosts play an important role for transmission of diseases from the host reservoirs to human. The aim of this study was to determine the species composition and infestation parameters for parasitic arthropods associated with Rhombomys opimus. METHODS Ectoparasites of R. opimus were collected from seven endemic district of ZCL in Iran including Shirvan and ...

gonabad located at khorasan razavi and coordinates 580 30’ n 34o 35’ e. the highest point of the zone belongs to peak of siah mountain (height of 2,863 meters above sea level) and the lowest place has height of 810 meters above sea level, which is located in north west in salt desert. the mean temperature of the warmest and coldest of year is 29.3 and 3.9 respectively. moreover, mean of rainfal...