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A New Soil Sampler and Elutriator for Collecting and Extracting Weed Seeds from Soil

Published online by Cambridge University Press:  12 June 2017

Lori J. Wiles
Affiliation:
, Water Manage. Res. Unit, USDA-Agric. Res. Serv., AERC, Colorado State Univ., Fort Collins, CO 80523
Douglass H. Barlin
Affiliation:
, Water Manage. Res. Unit, USDA-Agric. Res. Serv., AERC, Colorado State Univ., Fort Collins, CO 80523
Edward E. Schweizer
Affiliation:
, Water Manage. Res. Unit, USDA-Agric. Res. Serv., AERC, Colorado State Univ., Fort Collins, CO 80523
Harold R. Duke
Affiliation:
, Water Manage. Res. Unit, USDA-Agric. Res. Serv., AERC, Colorado State Univ., Fort Collins, CO 80523
Douglas E. Whitt
Affiliation:
AERC, Colorado State Univ., Fort Collins, CO 80523

Abstract

A soil sampler, elutriator, and associated sample flushing device were designed and constructed for an intensive study of weed seedbanks. This equipment was used in 1993 to collect and process 4980 soil samples. The sampler was durable, core size was consistent, and sampling was efficient. Cores were approximately 200 cm3 and two people could take 120 cores/h. The elutriator separated weed seeds from 36 of these cores at a time. Washing required 60 to 75 min depending on soil texture. Seeds as small as 0.3 mm in diam were recovered and almost 100% of the seeds were recovered from samples spiked with barnyardgrass, redroot pigweed, velvetleaf, and witchgrass. The flushing device was used to transfer sample contents from strainers of the elutriator to propyltex bags for drying and storing. Equipment like this, plus improved technology for identifying and counting seeds, is needed to make weed seedbank studies more feasible.

Type
Research
Copyright
Copyright © 1996 by the Weed Science Society of America 

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References

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