In a 10 second test, the Soil Fertility Meter reads the combined levels of nitrogen, phosphorus, and potash for maximum health, growth and productivity. The measurements are based on the U.S. Department of Agriculture.
All you have to do is insert the double probes completely into the soil, and it will register the fertility of the soil on the front of the meter. This will allow you to optimize plant growth, health, and productivity. Included you will find a complete list of guidelines for over 150 plants, and AA batteries.
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