| 摘要 |
FIELD: agriculture and soil science; evaluating water-physics properties of soils. ^ SUBSTANCE: porous probe communicating with water-filled tank is driven into soil, cathode is inserted in probe and anode, in soil. Voltage is applied to electrodes from dc power supply and soil moisture potential preventing water transfer from tank to soil is determined by measuring current between them. ^ EFFECT: reduced single measurement time due to eliminating escape of significant amount of water from measuring instrument. ^ 1 cl, 1 ex |
