2. Too much soil moisture make the plant root system lack of oxygen, root rot and is not conducive to plant growth, too little can not carry out normal photosynthesis and transpiration, but also lead to withering and death. 3. High- detection of pure copper movement. 4. Clear scale - no batteries, clear scale table test to see the value more accurate, no batteries, plug and play. 1. A variety of scenarios, easy to cope with applicable to soil testing, such as pot plants, greenhouses, gardens, soil research, agricultural orchards and other soil testing. 5. Metal Detection ProbeMetal detection sensor can detect and analyse soil moisture more quickly and accurately., Weight: 0.17857443222 pounds, Manufacturer: Aisuoka