Passive capillary wick samplers are supported by multiple field and numerical studies as reliable and accurate tools for measuring soil water fluxes and evaluating nutrient leaching.
Papers 0, 1, 4, 6, and 8 provide direct empirical and theoretical support showing that passive capillary wick samplers successfully measure water fluxes and leaching when properly designed and installed. The remaining papers are either tangentially related reviews or focus on other methods like suction lysimeters or standard drainage lysimeters without providing any refutation of wick samplers.