تهيه نقشه شوري خاك به منظور مديريت ويژه خاك هاي شور (مطالعه موردي: بخشي از اراضي زراعي شمال شرقي دشت آق قلا)

Preparing the soil salinity map for site-specific management, Case study: some farmlands in northeast of Aq-Qala

Salinization and sodification of soils is one of the major problems in arid and semi-arid regions with shallow water table. Preparing soil salinity map for site-specific management is an important issue, since excess of soluble salts in the soils root zone can provide problems to the plant growth. Study area is located in the northeast of Aq-Qala, For preparing soil salinity map, samples of 10Omʹ100m grid pattern in 784 points from 0-30 em soil depth were taken. Electrical conductivity from soil saturation extract (EC,) was measured. Analysis of data and preparing EC, map were carried using a Geographic Information System (GIS). The results was indicated that, EC, of study area is 932 dSm". According to the soil salinity map, soils were classified in the three ranges: 9-15,15-24 and 24-32 dSm-l . The results was indicated that the soils of study area were affected by salinization and sodification due to excessive evaporation of shallow saline water-table. While, soils in southlands is the more salinity than north lands, due to shallower water-table. Therefore, site-specific management and increasing the water table depth in study area suggested as main method to prevent of soil salinization and sodification. In this study preparing soil salinity map was aim for site-specific management and reclamation of soils in study area.