Root research is executed to improve the insight in the possibilities for root growth (depth and concentration) of the root system of trees and plants. In general it is important to all plants to have a dense and extensive root system in the soil. An extensive root system allows the plant to benefit from a large volume of soil. If sufficient quantities of nutrients and water are present the absorption will be larger if the root system is more extensive. Measuring the root system also is a useful means of localizing physical and/or chemical barriers in the soil profile.