Computer aided determination of proportion of sand in a soil

Determination of soil texture has always been very important for agricultural researches. Since determination of proportions of sand, silt, and clay in a soil by traditional methods requires more effort, in this study, we focus on performing soil analysis by an automated computerized system. First some features are extracted by applying curve fitting method on time signals measured by a light sensor circuit injected to the traditional hydrometer method, and then these features are used as input in a linear regression model. The obtained results showed that in spite of the limited number of experiments performed, such a system may be useful in determination of proportion of sand in a soil.