LIQUID LIMIT DETERMINATION OF ARABLE TOPSOILS USING A DROP-CONE PENETROMETER |
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| Authors: | D J CAMPBELL |
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| Institution: | National Institute of Agricultural Engineering-Scottish Station, Penicuik, Midlothian |
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| Abstract: | The drop-cone method, in which a 30° cone of mass 80 g is allowed to sink into a soil sample at a selection of moisture contents, is described and examined as a possible alternative to the Casagrande device for liquid limit determination. The methods are compared for 13 arable topsoils. The drop-cone method, which uses apparatus that is readily available commercially, is shown to have advantages in ease of conduct of the test and in greatly improved reproducibility between operators. |
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