Besides a penetrometer, which device is commonly used to assess soil compaction by extracting soil cores?

• A. Soil core sampler
• B. Tensiometer
• C. pH meter
• D. Moisture probe

Answer: (A)

Directly gauging how compacted the soil is relies on measuring bulk density, which rises as the soil becomes more tightly packed. While a penetrometer gives a quick field read on soil resistance, extracting soil cores provides a concrete, quantitative measure of compaction. A soil core sampler pulls uniform cylindrical samples from the field, which you can dry and weigh to calculate bulk density (mass per volume) and inspect the soil’s structure and pore space. This method is commonly used to identify compacted layers and to compare treatments or management practices over time. The other tools measure different properties: a tensiometer assesses soil water potential, a pH meter checks acidity, and a moisture probe estimates water content, none of which directly quantify compaction.