RESEARCH TO DETERMINE THE EFFECTS OF DIFFERENT SOIL PROPERTIES ON SPECTRAL REFLECTANCE VALUES OF CROPLANDS

摘要

The use of remote sensing techniques and Geographical Information Systems (GIS) for agricultural activities is becoming increasingly popular. Benefitting from remote sensing, essential functions, including cropland coverage estimation and monitoring, can be achieved. As the reflectance values of the same product type can differ with respect to soil characteristics, this research aims to investigate the relationship between the soil properties and the cropland reflectance values. In this study, 104 wheat-barley parcels and 26 potato parcels in the Central Anatolia region of Turkey were chosen from two different districts; Haymana and Bunyan. To disclose the relationship, images from the Sentinel 2 satellite was downloaded for predefined parcels during one season of production. Digital numbers (DN) of satellite images have been changing according to species phenological stages for each band, therefore, there are no standard soil reflection values even for the same crop species. In this study, the reflection characteristics of two plant species grown on different coloured soils were investigated. As a result of this research, soil properties which include soil colour, water holding capacity and mineral composites should be considered for the determination of the reference for reflection values of cropland.