| Mulqueen J, Stafford JV, Tanner DW Evaluation of penetrometers for measuring soil strength. |
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| These measurements are obtained by pushing penetrometers into the soil at equally spaced distances across a tillage tool's path. |
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| The films and attached penetrometers are loaded above ground and then lowered into position in the bay. |
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| Soil cone penetrometers have been used for years to measure soil compaction and to sense root impeding. |
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| However, there are doubts about the use of penetrometers in moist soil. |
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| Rotational Penetrometers are precision measurement devices that have calibrated, spring-loaded surface indicators to measure firmness and stability. |
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