Estimating cation exchange capacity from agronomic soil tests: Comparing Mehlich‐3 and ammonium acetate sum of cations

Mattila, Tiina; Rajala, Jukka

doi:10.1002/saj2.20340

Cited by 15 publications

(8 citation statements)

References 6 publications

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“…An organic element analyzer (OEA) was employed to identify the contents of elements including C, H, O, N, and S in soil samples (Table S3). Cation exchange capacity was tested by the ammonium acetate method . Wheat seeds were chosen for germination tests, since wheat represents one of the most important crop plants all over the world.…”

Section: Methodsmentioning

confidence: 99%

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Unveiling Molecular Transformations of Soil Organic Matter after Remediation by Chemical Oxidation Based on ESI-FT-ICR-MS analysis

Wang

Wei

et al. 2023

ACS EST Eng.

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Remediation of soils contaminated with organic pollutants is often accomplished by chemical oxidation processes using oxidants such as persulfate or H 2 O 2 . However, it is unclear how different oxidants transform soil organic matter (SOM) and affect soil ecosystem services. Herein, two chemical oxidation technologies, Fenton reaction (FT) and base-activation of sodium persulfate (BP), were investigated to remediate diesel-polluted soils. The molecular transformation of SOM was analyzed using excitation−emission matrix fluorescence spectroscopy (EEM FS) and electrospray ionization coupled with Fourier transform ion cyclotron resonance mass spectrometry (ESI-FT-ICR-MS). Fulvic acid-like substances and lipids were consumed in both treatments, while the contents of lignin-like and tannin-like substances increased after BP treatment. The oxygen to carbon ratios (O/C), modified aromaticity index (AI mod ), and double bond equivalent (DBE) of SOM increased significantly in BP-treated soil, while these parameters decreased in FT-treated soil (FTS), suggesting the oxygen-containing, unsaturated and aromatic compounds were produced in BPS but removed in FTS. The increased cation exchange capacity (CEC) value (81.47 cmol/kg) and germination index of wheat seed (97%) for the SOM in BPS indicate the possible favorable effect of persulfate-based treatment on soil quality. Overall, this study advances mechanistic understanding of the effects of H 2 O 2 -and persulfate-based soil remediation technologies based on the molecular compositions of SOM and soil quality.

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Section: Methodsmentioning

confidence: 99%

“…Cation exchange capacity was tested by the ammonium acetate method. 57 Wheat seeds were chosen for germination tests, since wheat represents one of the most important crop plants all over the world. Healthy seeds without visible defects were selected for treatment.…”

Section: Evaluation Of Soil Quality Aftermentioning

confidence: 99%

Unveiling Molecular Transformations of Soil Organic Matter after Remediation by Chemical Oxidation Based on ESI-FT-ICR-MS analysis

Wang

Wei

et al. 2023

ACS EST Eng.

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“…CEC represents the ability of soil to retain positively charged ions and is the main source of soil buffering capacity (Razzaghi et al, 2021). CEC can be used as an index to evaluate the ability of soil to retain and release nutrients, such as ammonium, nitrate, P, Mg, and Ca (Mattila and Rajala, 2022). Kaur and Sharma (2019) noticed that the addition of 10% biochar could significantly increase soil CEC by 26.54%-33.18%.…”

Section: Cation Exchange Capacitymentioning

confidence: 99%

Biochar enhanced phytostabilization of heavy metal contaminated mine tailings: A review

Shi

Zang

Yang

et al. 2022

Front. Environ. Sci.

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Mining activities has generated large amounts of mine tailings each year, and these tailings usually contain high concentrations of heavy metal pollutants, which not only cause serious damage to the local and surrounding soil ecosystems, but also harm human health via the transmission of food chain. Phytoremediation is treated as environmentally friendly, long-term effective and low-cost restoration method. However, tailing soil acidification, low organic matter content, poor water holding capacity and compaction make plant struggle to survive. Biochar, a soil conditioner can promote plant growth by improving the physical, chemical and biological properties of soil, thus strengthening the ability of phytoremediation in the contaminated tailings. This review elaborates how the physicochemical properties of biochar affect phytoremediation; and summarized how the raw materials of biochar affect the physicochemical characteristics. Finally, the future research directions are prospected.

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“…Using information from routine soil analysis has the advantage of developing calibration curves for specific soil conditions or production systems, and the accuracy of the predictions can be randomly checked with the standard methods. Research has investigated the use of routine soil‐test information, such as soil pH and Mehlich‐3 extractable nutrients, to predict CEC (Mattila & Rajala, 2022; Rutter et al., 2022), but information about pH and Mehlich‐3 extractable nutrients ability to predict clay, sand, and SOM contents is still scarce. We hypothesize that (i) soil properties with a strong affinity to the soil mineral phase, such as Mehlich‐3 magnesium (Mg) and estimated cation exchange capacity (EstCEC), are good predictors of soil clay content and textural class; (ii) predicting sand content using routine soil‐test results has lower accuracy than predicting clay content; and (iii) SOM prediction will be possible only when using multi‐factor models that include several nutrients due to the complex nature of the soil organic phase.…”

Section: Introductionmentioning

confidence: 99%

Soil texture and organic matter prediction using Mehlich‐3 extractable nutrients

Drescher,

Slaton,

Roberts

et al. 2024

Agrosystems Geosci & Env

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Soil organic matter (SOM) and texture are key properties influencing soil nutrient and water dynamics but are time‐consuming procedures for analytical laboratories. Our objective was to evaluate SOM and soil texture predictions using Mehlich‐3 nutrients and pH in Arkansas soils. Particle size was determined by the hydrometer method (2‐ and 8‐h readings) and SOM by loss on ignition. Two datasets were used to calibrate clay and sand (n = 409) and SOM (n = 1019) prediction models using simple and multiple regression. Estimated cation exchange capacity was highly correlated with clay, resulting in significant prediction models alone or combined with phosphorus (P); pH and copper (Cu); or pH, sodium (Na), and Cu (R2 = 0.84, 0.88, 0.89, and 0.90; p < 0.0001, respectively). Soil nutrients were weakly correlated with sand, resulting in a prediction model with moderate accuracy when using Mehlich‐3 P, calcium (Ca), Na, iron (Fe), and manganese (Mn) (R2 = 0.49; p < 0.0001). Clay and sand prediction models presented comparable accuracy when validated on a new dataset (n = 103). Predicted sand and clay showed good accuracy in grouping soils into medium (65%) and fine (96%) textural categories but had limited ability to define the coarse‐textural group (9%). SOM had moderate goodness‐of‐fit statistics for calibration and validation datasets using pH, P, Ca, Na, Mn, and zinc (R2 = 0.65 and 0.70, respectively; p < 0.0001). Mehlich‐3 nutrients can be used to estimate soil texture and assist with crop management decisions, but further research is needed to improve SOM prediction.

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Estimating cation exchange capacity from agronomic soil tests: Comparing Mehlich‐3 and ammonium acetate sum of cations

Cited by 15 publications

References 6 publications

Unveiling Molecular Transformations of Soil Organic Matter after Remediation by Chemical Oxidation Based on ESI-FT-ICR-MS analysis

Unveiling Molecular Transformations of Soil Organic Matter after Remediation by Chemical Oxidation Based on ESI-FT-ICR-MS analysis

Biochar enhanced phytostabilization of heavy metal contaminated mine tailings: A review

Soil texture and organic matter prediction using Mehlich‐3 extractable nutrients

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