A simple apparatus for measuring the compactness of soil in the field.and some results obtained I a cultivation experiment.By O.V.S.Heath (The Empire Jour.of Experi.Agri.vol.ii.No.7pp.205-212).The articlethe article describes a simple and easily made apparatus.for measuring compactness in a soil.the method of working it.and the results obtained with it.Based on the principle of the stratometer.the apparatus consists of a tripod.supporting an iron rod which bears at its lower en a steel cone.A length of steel pipe surrounding the rod serves to carry the force of impact direct to the cone.the rod only serving as a guide.The weight is lifted to a mark on a graduate scale behind and allowed to full freely.thus driving the point into the soil.A"soil plate"placed flush with the soil.and provided with a projecting tube which prevents loose soil falling into the hole made by the steel cone.completes the apparatus.
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