A Power-Driven Self-Propelled Soil Sifter for Subterranean Insects

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Abstract
The compactness and field maneuveribility of the present machine are its chief advantages over previously designed equipment for determining populations of soil insects and wireworms in particular. The equipment is easily loaded on a pick-up truck under its own power, and its ability to move to individual plots under its own power with a minimum amount of soil compaction is a main feature. A special feature is the support of the trays and shaking frame by means of 4 spring steel straps. Capacity of the machine is from 0.25 to 0.5 cu. ft. of soil per sifting, but a convenient load is 0.33 cu. ft. From 32 to 96 soil samples can be sifted in an 8-hr. day. By use of the proper screen sizes in the trays, comparable wire-worm counts are possible. The machine is of value in estimating effectiveness of chemical and other soil treatments in exptl. plot investigations.

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