An undisturbed core sampling and sectioning technique for wetland rice soils

Savant, N. K.; Datta, S.K. De

doi:10.1080/00103627909366935

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…The most common samplers include the tube auger (AMS Inc., 2017), the Russian borer (LG. Franzén and T.L Ljung, 2009), the peat sampler (Buttler et al , 1998), the Rickly sampler (Rickly Hydrological Co. Inc., 2017), the International Rice Center sampler (Savant and De Datta, 2008), the Caldwell PVC sampler (Caldwell et al , 2005), and vibra/power corer systems (Finkelstein and Prins, 1981). Those specialized samplers could be hard and expensive to obtain; their sales price range from 400 USD to 3000 USD (AMS Inc., 2017).…”

Section: Introductionmentioning

confidence: 99%

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A simple and effective sampler to collect undisturbed cores from tidal marshes

Giannopoulos

et al. 2019

Preprint

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Core sampling is a common procedure in wetland ecology. A simple and inexpensive sampler is described for field use. Its main advantages are: 1) extraction of undisturbed cores; 7.6 cm diameter and up to 100 cm depth, 2) it is lightweight, sturdy and reliable, 3) it is made from widely available PVC items and 4) it requires minimal skills to assemble. The sampler is introduced in the wetland soil, by rotation, to the desired depth; the tooth-like edge can cut and penetrate through the dense root systems. The sampler is capped with an industrial-type stopper, and pulled up. The core is held in the sampler by suction-negative pressure. A plunger is then used to slowly remove the soil-core and sub-samples are collected. Alternatively, both ends of sampler could be sealed and taken to the lab. An 8 cm long sub-sample was adequate for soil physical, biogeochemical and molecular analysis. The sampler has been tested for 2 years with more than 200 cores taken from tidal wetlands in Chesapeake Bay, Virginia, USA. A negative correlation between salinity and organic matter content at 3-5 and 8-10 cm was found. For the deeper samples (48-50 cm), a positive correlation between salinity and organic matter was observed. The sampler worked satisfactory and it required no maintenance besides cleaning.

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Section: Introductionmentioning

confidence: 99%

“…A strong handle is added on the top edge of the sampler for tough handling. To retain the core, an air-tight stopper instead of a vacuum seal system (Savant and De Datta, 2008) is used for simplicity. This industrial type of stopper is expected to secure the core by negative-pressure while the sampler is pulled up.…”

Section: Introductionmentioning

confidence: 99%

A simple and effective sampler to collect undisturbed cores from tidal marshes

Giannopoulos

et al. 2019

Preprint

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“…The type of data expected from the soil core is also an important consideration in selection of the sampling method (3,13,17,28,32,35). Various methods (e.g., 5,6,7,8,15,19,25,27) have been developed for the extraction of intact soil columns due to the differences in soils (4,9,14,24,26,30) or field conditions (16,18,31,38). The construction costs were very high, particularly for those rnotorized sarnplers.…”

Section: Introductionmentioning

confidence: 99%

Field Extraction of Large Intact Soil Cores for Leaching Studies in the Laboratory

1996

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Various samplers have been developed for taking intact soil cores. Very often, the sampler was used once or twice to take only a few soil cores then it became either obsolete or a burden for maintenance and storage. An economic portable hand-operated soil core sampler was developed to obtain large soil cores with a diameter of 19 cm and a length of 120 cm. The quality of large soil cores was evaluated and compared with that obtained from short cores from each soil horizon. In addition, the large intact column was used to evaluate atrazine transport under the saturated condition. Results showed that the hydraulic conductivity of the large cores were of the same magnitude as that of short cores, except for the A horizon; the hydraulic conductivity of the large cores was about 10 times greater than the short cores. Even though the sampling procedure is labor intensive, the soil sampler has the flexibility to collect different size soil cores and can be constructed at a very low cost (less than $200 including labor). Lastly, the sampler is maintenance free and can be stored easily in a limited space.

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