Soil-Water Interactions

Schaumann, Gabriele E.; Bertmer, Marko

doi:10.1002/9780470034590.emrstm1343

Cited by 4 publications

(5 citation statements)

References 74 publications

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“…The required time to re-reach the equilibrium is the relaxation time (Meiboom and Gill,1958;Schaumann and Bertmer, 2014). Relaxation times occur as spin-spin (transverse) and spin-lattice (longitudinal) relaxation as a result of interactions between the spin system and the surrounding environment.…”

Section: H Nmr Relaxometry In Soilmentioning

confidence: 99%

Intrinsic and model polymer hydrogel-induced soil structural stability of a silty sand soil as affected by soil moisture dynamics

Buchmann

Bentz

Schaumann

2015

Soil and Tillage Research

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Section: H Nmr Relaxometry In Soilmentioning

confidence: 99%

Intrinsic and model polymer hydrogel-induced soil structural stability of a silty sand soil as affected by soil moisture dynamics

Buchmann

Bentz

Schaumann

2015

Soil and Tillage Research

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“…PSD is a key metric for characterizing the pore network of soils [36]. Nuclear magnetic resonance (NMR) is a prospective technique for profiling soil-water interactions [37], proven to be extensively used in geosciences, petroleum extraction, and other fields. The NMR is a non-destructive and efficient method for estimating soil pore size distribution that has advantages over X-ray computed tomography (CT) scanning in terms of speed and simplicity [38].…”

Section: Introductionmentioning

confidence: 99%

Effect of Biochar on Soil-Water Characteristics of Soils: A Pore-Scale Study

Chen

et al. 2023

Water

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The mechanical and hydraulic properties of soils are largely governed by their soil-water characteristics, which are influenced by factors such as pore size distribution (PSD). While biochar is commonly used as an additive to alter soil properties, its effect on PSD and the soil water retention curve (SWRC) at the pore scale remains unclear. This study aims to investigate the impact of biochar on PSD and SWRC in soils of different types. The study utilized nuclear magnetic resonance (NMR) and the filter paper method to obtain the particle size distribution (PSD) curve and soil water retention curve (SWRC) of various types of soils, ranging from fine-grained to coarse-grained, with different amounts of biochar. The results and discussion revealed that the impact of biochar on soil PSD and SWRC varied depending on the soil type and biochar content. In fine-grained soils, the addition of 8% biochar resulted in the greatest decrease in mesopore size and percentage, while in medium-grained soils, 6% biochar had the most significant effect, and in coarse-grained soils, the optimum biochar content was 2%. At low suction states, the addition of 8% and 2% biochar improved the water retention of fine-grained and medium-grained soils, respectively, but had little effect on coarse-grained soils. Overall, the effect of biochar on soil-water characteristics was non-monotonic and depended on the relative sizes of biochar and soil particles. Therefore, selecting the optimum biochar-to-soil ratio requires careful consideration of these factors.

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“…Compared to 1 H NMR relaxometry, X‐ray tomography scanning is slower and has a lower resolution (Sleutel et al ., ). These methods are time‐ and effort‐consuming, therefore there is a demand for an efficient alternative (Costabel & Yaramanci, ; Schaumann & Bertmer, ).…”

Section: Introductionmentioning

confidence: 99%

“…Proton nuclear magnetic resonance relaxometry ( 1 H NMR relaxometry) is a promising method to characterize soil–water interactions (Schaumann & Bertmer, ). It has been widely used for a few decades in the earth sciences and petroleum exploration to quantify water and hydrocarbon contents in sedimentary rocks (Dunn et al ., ; Keating & Knight, ).…”

Section: Introductionmentioning

confidence: 99%

Determination of quantitative pore‐size distribution of soils with ¹H NMR relaxometry

Meyer

Buchmann

Schaumann

2018

European J Soil Science

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Summary The determination of pore‐size distribution (PSD) in soil by conventional methods can be time‐ and effort‐consuming. Therefore, several attempts have been made recently to assess and implement proton nuclear magnetic resonance relaxometry (1H NMR relaxometry) to determine PSDs quantitatively. The 1H NMR relaxometry promises not only to be more time‐ and effort‐saving but also offers a broader range for the estimation of pore size, better resolved results and non‐destructive measurements. To evaluate these possibilities, we tested the extent to which a single calibration curve for the estimation of surface relaxivity of soil, derived from seven soil samples, can be applied to unknown soils. For validation, the quantitative PSDs of seven additional soil samples were determined from the distributions of NMR relaxation times of water saturated samples using this calibration curve; they were compared with their classical water retention curves (WRCs). In general, the quantitative PSDs determined by this approach described the classical WRCs quite well. The best results were obtained for sandy, silty and loam soils. The largest differences were for soils with large clay (47%) and SOM contents (10 and 21%). Our results suggest that these differences derive from swelling processes. Highlights Can NMR relaxometry be used to quantify soil pore‐size distribution without individual calibration? Soil pore size assessment by NMR is fast, detailed and independent of conventional methods NMR method describes the pore‐size distribution of various soil types and soil compositions. NMR method can assess quantitative effects of SOM and swelling of clay in soil.

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Soil-Water Interactions

Cited by 4 publications

References 74 publications

Intrinsic and model polymer hydrogel-induced soil structural stability of a silty sand soil as affected by soil moisture dynamics

Intrinsic and model polymer hydrogel-induced soil structural stability of a silty sand soil as affected by soil moisture dynamics

Effect of Biochar on Soil-Water Characteristics of Soils: A Pore-Scale Study

Determination of quantitative pore‐size distribution of soils with ¹H NMR relaxometry

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Soil-Water Interactions

Cited by 4 publications

References 74 publications

Intrinsic and model polymer hydrogel-induced soil structural stability of a silty sand soil as affected by soil moisture dynamics

Intrinsic and model polymer hydrogel-induced soil structural stability of a silty sand soil as affected by soil moisture dynamics

Effect of Biochar on Soil-Water Characteristics of Soils: A Pore-Scale Study

Determination of quantitative pore‐size distribution of soils with 1H NMR relaxometry

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Determination of quantitative pore‐size distribution of soils with ¹H NMR relaxometry