Penetrometer compaction test

A penetrometer is a tool used to test the compaction level and tilth of your soil. Penetrometers measure the resistance of the soil in Pounds Per Square Inch (PSI) giving an indication of how compacted your soils are as an indication of the soil quality.

The penetrometer provides very accurate information on soil strength, or resistance to penetration, to some depth. However, strength measurements are affected by moisture, porosity, and rock content. … The roots of many plants quit growing when the soil’s strength reaches about 2,500 kPa.

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