Determination of optimal cropping pattern is essential for arid and semiarid regions with deficit water resources. Fars province is located in the southern part of I.R. of Iran with mean annual precipitation from 50 to 1000 mm and in most parts of this province water resources for agriculture are deficit. Jahrom region with semi-arid climate is located in Fars province with mean annual rainfall...

Abstract—In recent decades with the development of technology and lack of food sources, sewage sludge in production of human foods is inevitable. Various sources of municipal and industrial sewage sludge that is produced can provide the requirement of plant nutrients. Soils in arid, semi-arid climate of central Iran that most affected by water drainage, iron and zinc deficiencies, using of sewa...

on one hand, iran due to the low annual rainfall and lack of appropriate spatial and temporal distribution in precipitation is considered as an arid and semi-arid country experiencing stress and water scarcity; on the other hand, 90% of annual water consumption has been allocated to agriculture sector in iran and efficiency and productivity of water consumption do not enjoy favorable status in ...

Although dry farming is important in Azerbaijan, Kurdistan, and Khorasan, as well as some other districts, a large proportion of Iran’s agriculture has always depended upon irrigation. Approximately half the annual grain crop, and an overwhelming proportion of other crops, are irrigated. With the exception of the Caspian littoral almost the whole of Iran is classified as semi-arid or arid. As i...

heavy rains are one of the features of arid and semi arid climates which result in flood. this kind of rainfall originates from environmental and synoptic conditions. mediterranean cyclones are the major factor in heavy rainfall in iran, but these cyclones do not happen in some parts of iran such as southern and southeastern areas. in this study, it has been tried to pinpoint the synoptic reaso...

More accurate forecasting of monthly rainfall is significantly important in drought forecasting in agriculture, irrigation schedule, water resources management, and crop pattern design. In this paper, ability of time series models in forecasting the rainfall according to the climate conditions is estimated. For this purpose, rainfall data of four different climates in Iran was selected. Using t...

in order to assess the satellite data for soil investigation, aster digital data 20 june 2006, field study and phisiochemical properties of soil, were analyzed. all landcover classes including soils are classified based onmorphological and physico-chemical characteristics. images were geocorrected and photomorphic units were selected based upon visual interpretation and sampling in study area. ...