This study was conducted to estimate the effect of salinity on crop yield by employing a geographical information system (GIS) and remote sensing technologies. The saline soils of Ar›can village, located in the southeastern part of Harran Plain, were studied. | Turk J Agric For 27 (2003) 23-28 © TÜB‹TAK Estimation of the Effect of Soil Salinity on Crop Yield Using Remote Sensing and Geographic Information System Mehmet Ali ÇULLU* Harran University, Faculty of Agriculture, Department of Soil Science, fianl›urfa - TURKEY Received: Abstract: This study was conducted to estimate the effect of salinity on crop yield by employing a geographical information system (GIS) and remote sensing technologies. The saline soils of Ar›can village, located in the southeastern part of Harran Plain, were studied. Surface soil samples representing each soil series in the study area were collected and analyzed to generate an electrical conductivity (EC) map of the study area soils. Using ground truth information, satellite images were classified and land use classes were determined in the study area. The EC map, land use map, soil map and parcel map were combined and analyzed in GIS media to estimate the effect of salinity on crop yield. The results showed that increasing EC values up to dS m-1 caused decreases in cotton and wheat yield of % and %, respectively. Increases in salinity above the threshold for cotton and wheat resulted in a linear decrease in crop yields. The results indicated that remote sensing and GIS techniques are useful tools for estimating the effects of soil salinity on crop production as shown for wheat and cotton in the present work. Key Words: Remote Sensing, GIS, relative yield, crop yield, salinity, EC Uzaktan Alg›lama ve Co¤rafi Bilgi Sistemi Kullan›larak Toprak Tuzlulu¤unun Ürün Verimi Üzerine Etkisinin Tahmin Edilmesi Özet: Bu çal›flma, uzaktan alg›lama ve co¤rafi bilgi sistemi (GIS) teknikleri kullan›larak tuzlulu¤un ürün verimi üzerine olan etkisini tahmin edilmesi için yürütülmüfltür. Harran Ovas›’n›n güney do¤usunda yer alan Ar›can köyünün tuzlu topraklar› çal›flma alan› olarak seçilmifltir. Çal›flma alan›n› temsil eden serilerin yüzey topra¤›ndan örnekler al›narak analiz edilmifl
