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Title:   Author  item
                                            Wuest, Stewartitem
                                            SCHILLINGER, WILLIAM - WASHINGTON STATE UNIV
  Submitted to: Washington State University College of Agriculture and Home Economics
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 4/22/2008
                                    Publication  Date: 6/1/2008
                                    Citation: Wuest, S.B., W.F. Schillinger. 2008. An Improved Method for Soil Sampling at Small Increments. In 2008 Field Day Abstracts: Highlights of Research Progress. Dept. Of Crop and Soil Sciences Tech. Report 08-1, WSU, Pullman, WA.Interpretive Summary:
                                Technical Abstract: Measurement of soil bulk density and volumetric water content in small depth increments is a tedious and time-consuming task, but very important in many research applications. We designed an electric sampler to improve accuracy and decrease labor requirements. The new method works even in loose, dry soils, and can be used to provide increments at less than 0.5 inch, if desired. The sampler uses an electric linear actuator to push an intact soil core out of the sampling tube. The soil core is maintained in a vertical position and protected from fracturing by remaining inside the tube until sectioned with a saw blade. Precise length increments and flat cuts are easily obtained. Compared to existing incremental sampling technology developed 30 yrs. ago for loose, dry soil conditions, the electric sampler had a two-fold reduction in sample variability. The electric sampler requires only 7 min. to collect a 10-inch core and section it into 13 increments compared to 20 min. per core with the older sampler.


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