جستجوی مقالات مرتبط با کلیدواژه "شوری و قلیاییت" در نشریات گروه "محیط زیست"

This research was conducted to investigate land suitability classification for better use of agricultural lands and sustained crop production crops in Aq qaleh area, using geographic information system. Soil units were delineated bases on aerial photo interpretation, using topographic maps as auxiliary materials. Land suitability classification was done based on information extracted from soil map, using guidelines given in FAO (9). The rating given in sys et al (16,17) was used to match soil properties and crop requirements. The results obtained showed that climate and soil related factors constraint economic and sustainable production in this area. So that the majority of the studied area fall in land suitability class N2 for the selected crops. Even if soil salinity and sodicity, the two major soil limitation factors in the Aq qaleh area are removed, then the studied area is only marginally suitable for production of the rainfed wheat while rainfed barley and irrigated cotton can be grown expending moderate economic return. cities pollution and making the transportation easy and reaching to these sample making centers in different seasons and these places are selected because of its little distance to these centers of Hydrometers. Approximately, there are 8 to 12 centers in the length of Qomrood river and the amount of BOD5, COD,TURB, TEMP, COND, DO,PH have been tested, and from the objects (IDS) in Emamzadeh Abdullah (a.s) Qaleh cham, Khalajabad Bridge, receive the majority of these objects also the main dark TURB is in Qalehcham region Fara asphalte Bridge, Khalajabad Bridge Hamvarlakhah is more than the other centers and sand washing units cause these activities in this regions. Leading the water to panzdaheh khordad Dam and the water is influenced by salty lands menwhile entering the dirty water of Ro system to be cleaned to be cleaned and in Enghelab Bridge of this one of the reasons of increasing the EC of the water of the river. In the studies it has been clarified that agricultural, industrial, man made, and city pollution has made the Ecosystem of the river dirty. Entrance of pollution to the river causes the increase of chemicals and decrease oxygen of water, and it caused the death of water creatures specially fishes.