Device and method for determining growth-relevant parameters in soil

摘要

Device for determining at least one growth-relevant parameter in soil (5) with at least one probe (1) with at least one porous, hydrophilic measuring matrix (4), wherein in the at least one outwardly encapsulated probe (1) at a distance from a surface (8, 9 ) the at least one measuring matrix (4) at least one laser diode (10) that uses laser light (11) to image a light spot (12) on the at least one measuring matrix (4) and at least one light detector (14) that detects reflections (15) are provided, characterized that the at least one growth-relevant parameter is a content of salts dissolved in the water in the soil and the light detector (14) is designed to detect reflections of a circle of light (12) spaced radially from the light spot (12) and generated as a function of the content of salts dissolved in the water in the soil ( 13) to capture.