What happens if my soil bulk density corer goes too deep into the soil? 

Sometimes the conditions for measuring soil bulk density are conducive to the sampler penetrating too deeply into the soil. How does this affect the finished soil sample?
In this video, Marie Johnston, soil scientist, demonstrates this mistake and explains how driving the sampler cup too deeply misses the intended depth interval and causes errors in your data. Although the mistake will not be visibly noticeable, the soil bulk density value will be higher because soil is compressed inside the sleeve.
Acknowledgement: Thank you to AMS Samplers, American Falls, Idaho, USA, for their generous donation of equipment to enable this demonstration. Supplies shown in this video include: Hex quick pin slide hammer with 3-inch core sampler cap, clear plastic sleeve of 3-inch diameter and 6-inch length, two stacked stainless steel sleeves of 3-inch diameter and length, and planer auger of 3-inch diameter.
Want to learn more about soil carbon and soil health? Visit us at Decode 6 (decode6.org/).

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