Abstract Human activates such as tillage and cultivation practices along with low organic matter have been led to soil degradation, compaction and increasing its erosion. Sustainable and precise soil management is one of approaches to prevent these problems. This study was aimed to investigate the relationship among different soil characters alike soil organic matter and nitrogen content with fertilizer demand. These information could be useful to reduce cultivation practices. Our results indicated that because of non-uniformity in measured soil characters, fertilizer demand also is completely different. Therefore GIS as an approach could be useful for precise management of soil fertility and consequently soil cultivation practices.To do this, reclassified maps of organic matter and nitrogen content were provided by using Digital Elevation Model and the gap of aforementioned characters with recommended values were calculated. These gaps were used pixel by pixel to provide fertilizer demand maps. These maps are fruitful guidelines to sustain soil as the main component of agroecosystems. In this study, spatial analyst tools, procedures and function were used to interpolate and reclassify the raster maps. Organic matter changed from <1 to 5% and nitrogen content was less than 0.14 ppm. Our results indicated that for precise management of soil cultivation, the practices intensity should be adjusted based on soil physiochemical characters to maintain high-quality zones and improve low-quality ones

Keywords