Prediction of Soil Organic Carbon and Total Nitrogen and their effect on Soil suitability for wheat production Using Remote Sensing

The study was conducted to predict of organic carbon and total content of available Nitrogen on soil suitability for wheat production . The study area located in central of Iraq ,in Al-Kufa – Alnajaf province laying between 32°10 04.76 N to32°10 04.76 N and 32°10 04.76 N to 44°34 49.28 E with total area of 27664 ha. Thirty five sites were selected representing all variations with in the study area and located on landsat8 image using GPS .Soil samples were taken from each of the selected sites and analyzed in laboratory to determine some physical and chemical properties . Rating scores for soil properties were evaluated using FAO, 2007 system to determine the suitability class for each soil sites .The results indicated four suitability classes for wheat production in the study area including S2 , S3 , N1 and N2 with ,about 37% from the total area of the study site are not suitable for wheat production due ,mainly to the effect of high salinity level and to some extent to low content of organic carbon and total available Nitrogen. Also, the results indicated the effects of organic carbon and available Nitrogen on the spatial distribution pattern of soil suitability classes for wheat product.

Keywords:

Land suitability , Soil Organic Carbon , wheat