I. A soil sampler suitable for sampling pastureland

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Abstract
A manually operated 10 cm diameter soil sampler, capable of sampling a wide range of pastureland soils, has been developed for population studies of Costelytra zealandica (White). The number of samples taken per 8-h man-day depends on plot size, soil type, and moisture, and varies between 195 ± 11.29 and 274 ± 16.30. The design of the sampler permits the coring and quick release of relatively undisturbed samples.