Probe the Impact of Soil Texture Components and Geometric Mean of Particles Diameter on the Soil Spectral Response (Case Study: the Part of Khatam plain- Yazd Province)

Identification of soil texture with special respect to its variability in specific location and stability in time periods affects many physical and chemical characteristics of soil and has been widely highlighted in geomorphology, agricultural and environmental sciences. Introduction of remote sensing techniques which has emerged approach towards science development and its high special resolution abilities, having multi spectral bands and processing vast range of data has brought, more facile and cost-efficient soil study techniques. (Casa et al., 2013) studied hyper spectral images and highlighted the importance of short waves infrared bands (SWIR) for soil texture identification; whereas (Feng et al., 2012) used MODIS images for preparation of soil texture maps. It is safe to say that there has been no study on geometric mean of particle diameter difference by means of ASTER multi spectral imaging in Iran. So, this paper describes the relationship between geometric mean of particle diameter and soil texture components (sand, silt, clay) versus ASTER multi spectral images. For this purpose Khatam plain in Yazd province, having 713.5 km2 was selected.