Soil moisture probe simplifies fertilization and liming decisions
This simple-to-operate soil moisture probe gives reliable readings from 3.5 to 7.0 pH and water moisture from 0-100%. Probe operates through natural electric charge generated from soil through the metal side plates on the probe (no batteries to replace). To take a measurement, insert probe into soil, wait 3 minutes and take readings. Accurate to ±.2 on pH and ±10% on moisture. Includes instructions and carry case. Requires conditioning film (Item No. 221176) to clean side plates.
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2013 Master Catalog: Page 379