The influence of aeolian dust in non-allophanic Andosols on Yakushima Island

Eguchi, Tetsuya; Tanaka, Ryoji; Maejima, Yuji; Tamura, Kenji

doi:10.1080/00380768.2012.672926

Cited by 8 publications

(1 citation statement)

References 26 publications

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“…This is consistent with the results of previous studies, in which it has been shown that 137 Cs activity in soil contaminated through global fallout (Tsukada et al, 2008) or mainly because of the Fukushima accident (Saito et al, 2014) was partly distributed in the sand and silt fractions. Silt‐sized micaceous minerals are present (at different levels) in Japanese soils because they are components of eolian dusts (Inoue and Naruse, 1987) that have been widely deposited on Japanese soils (Mizota and Matsushita, 1985; Eguchi et al, 2012). The Aizu region is west of the Ou Mountains, where wet deposition (including continental dust) is trapped, so soils in this region will have been influenced by the deposition of eolian dusts more than soils in the other two regions.…”

Section: Resultsmentioning

confidence: 99%

Relationships between Paddy Soil Radiocesium Interception Potentials and Physicochemical Properties in Fukushima, Japan

et al. 2015

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The radiocesium interception potential (RIP) of bulk soil (RIP) can reliably be used to predict the magnitude of soil-to-plant radiocesium transfer. There has been some controversy about which soil properties control the RIP, although the RIP is theoretically proportional to the amount of frayed edge sites in micaceous clay minerals. The RIP was determined for 97 paddy soils in three regions (Hama-dori, Naka-dori, and Aizu) in Fukushima Prefecture, Japan, and the relationships between selected physicochemical properties and the RIP were analyzed. The mean (± standard deviation) of the RIP for the 97 soils was 1.67 (±0.87) mol kg, and the range was 0.34 to 5.36 mol kg. Pearson correlation analysis revealed that the RIP positively correlated best ( < 0.01) with the clay fraction K content as a mass fraction of the bulk soil (clay-K) and negatively correlated with the total C content and the phosphate absorption coefficient ( < 0.05). Therefore, clay-K, an indicator of the amount of micaceous clay minerals in a soil, was confirmed as being useful for estimating the magnitude of the RIP for paddy soils in Fukushima. The RIP was invariably low if either the total C content exceeded 6.0% or the phosphate absorption coefficient exceeded 1500 mg kg, suggesting that these parameters could be useful for screening soils with particularly low RIP values.

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Section: Resultsmentioning

confidence: 99%

Relationships between Paddy Soil Radiocesium Interception Potentials and Physicochemical Properties in Fukushima, Japan

et al. 2015

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Examination of the reliability of X‐ray powder diffraction analysis to determine mineral composition of soils

Kurokawa,

Azuma,

Nakao

et al. 2024

Soil Science Soc of Amer J

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X‐ray powder diffraction (XRPD) is an effective technique for identifying and quantifying mineral types in soil. However, few studies have compared quantitative values based on XRPD with those from conventional wet chemical methods (WCMs). Here, we determined the primary mineral content in artificial mineral mixtures and 79 agricultural soils from across Japan using WCMs and two XRPD‐based quantitative methods: the mineral intensity factor (MIF) and the full‐pattern summation (FPS) methods performed with the powdR package for R. For artificial mixtures, the accuracy of mineral content determination (i.e., micas, quartz, K‐feldspar, and plagioclase) followed the order: WCMs > FPS > MIF. For Japanese agricultural soils, the contents of each mineral were highly similar between WCMs and FPS, based on mean absolute differences and correlation coefficients. Alternatively, MIF displayed lower similarities with WCMs, likely due to preferred orientation and peak shift or overlap issues. Using the FPS method, the mica and amorphous phase contents were positively and significantly correlated with nonexchangeable K content and cation exchange capacity, respectively. Additionally, the plagioclase content was negatively and significantly correlated with clay content. Thus, the powdR‐based FPS method is recommended for determining the mineral composition of soils, as it allows for a clearer and more quantitative demonstration of the relationship between individual minerals and soil properties.

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Analysis of problems in certain soils of the Kyushu Okinawa region for suitable management

Kubotera

2019

Soil Science and Plant Nutrition

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Soils in the Kyushu Okinawa region with problematic properties for agriculture were studied and the following findings were obtained. 1) Mahji-soils in Nansei Islands became very hard with desiccation under high-pH conditions; therefore, soil treatments that cause alkalinization such as overliming should be avoided. 2) In contrast to the generally favorable effects of organic matter on the physical properties of soil, the application of manure compost at 100 Mg ha −1 to Mahji-soils increased the degree of hardening with desiccation. 3) Application of clinker ash (coarse fraction of coal ash) at 10% (wt/wt) mitigated the hardening and shrinkage of Jagaru, a heavy-textured gray soil found on Nansei Island. 4) Non-allophanic surface horizons with strong acidity were widely distributed in the Andosol area of central Kyushu, covering at least 340 km 2. These horizons showed a relatively large ratio of carbon per Al p (pyrophosphate extractable aluminum) and high content of allophane, and began forming around 2500 years ago. 5)Some Andosols in Kyushu showed remarkable hardness. They are divided into two types, according to the degree of weathering and hardening characteristics, and the different measures required to improve each type. 6) An experimental method for determining nitrate retention by soils was developed, and factors influencing the nitrate retention of Andosols were elucidated using this method. 7) A method for micromorphological observation of pelletized manure compost (PC) grains was developed. This method revealed that the internal microstructure of PC did not change in 18 months after compost application, whereas the volume of the grains decreased with the formation of voids around them. 8) As an indicator of soil acidity concerning the countermeasure for common scab, pH(KCl) can easily be used instead of exchangeable acidity y 1, which is laborious to determine. The maximally simplified pH(KCl) measurement method can be carried out by farmers in the field.

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The influence of aeolian dust in non-allophanic Andosols on Yakushima Island

Cited by 8 publications

References 26 publications

Relationships between Paddy Soil Radiocesium Interception Potentials and Physicochemical Properties in Fukushima, Japan

Relationships between Paddy Soil Radiocesium Interception Potentials and Physicochemical Properties in Fukushima, Japan

Examination of the reliability of X‐ray powder diffraction analysis to determine mineral composition of soils

Analysis of problems in certain soils of the Kyushu Okinawa region for suitable management

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