Emergence Rates of Sesame, Perilla, Peanut, and Sorghum under Different Soil Moisture Conditions and Amendment Treatments in Saemangeum Reclaimed Land

Lee, Kwang-Seung; Oh, Yang-Yeol; Ock, Heekyoung; Lee, Hak Sung; Kang, Bang-Hun; Jung, Kang-Ho

doi:10.7745/kjssf.2022.55.2.139

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…우리나라 농경지의 약 11.7%를 차지 하는 간척지도 입지 특성에 의한 염해 가능성이 높아서 (Lim et al, 2020), 염해를 회피하고 주곡인 쌀 생산을 위해 밭 작물에 비해 내염성이 높은 벼를 주로 재배하고 있다 (Jeong et al, 2020;Lim et al, 2020). 하지만, 쌀 과잉 생산에 따 른 간척지 밭 작물 재배에 대한 정책적 요구가 증가하고 있어 간척지 염농도 모니터링과 그에 따른 작물 재배 관리가 더욱 중요해지고 있다 (Ryu et al, 2021;Seo et al, 2021;Yun et al, 2021;Lee et al, 2022).…”

Section: Introductionunclassified

Conversion Factors for Electrical Conductivity of 1:5 Soil-Water Extracts to Saturated Paste of Reclaimed Tideland Soils are Affected by Sand Contents

Seo¹,

Lee²,

Park³

et al. 2022

Korean J. Soil. Sci. Fert.

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Electrical conductivity (EC) of saturated soil paste extracts (EC e ) is a standard measure for soil salinity assessment. However, due to the difficulty of EC e measurement, EC of the extracts of 1:5 soil:water ratio (EC 1:5 ) is widely used, and thus conversion of EC 1:5 to EC e is often required. However, the conversion factor varies widely being affected by many soil factors including soil texture though such variation has rarely been investigated. This study was conducted to explore the effect of soil texture (particularly sand content) on the EC conversion factor using soil samples (n = 628) from 19 reclaimed tidelands (RTLs) located in the coastal areas of Korea. The conversion factors ranged from 4.6 to 9.9 (average 7.5) and the conversion factors were positively correlated with the average sand content of the RTL (r 2 = 0.48, P < 0.001) except for three RTLs which have extremely low sand contents. The increased EC conversion factors for soils with higher sand contents should be ascribed to decreased saturated water contents for EC e . Our results demonstrate the critical influence of sand content on the EC conversion factor by highlighting the necessity of consideration of sand content for EC conversion factor.

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Section: Introductionunclassified

Conversion Factors for Electrical Conductivity of 1:5 Soil-Water Extracts to Saturated Paste of Reclaimed Tideland Soils are Affected by Sand Contents

Seo¹,

Lee²,

Park³

et al. 2022

Korean J. Soil. Sci. Fert.

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Soil Physico-Chemical Properties and Groundwater Levels at the “Agricultural Life Science Sites” in Saemangeum Reclaimed Land

Seo¹,

Jung²,

Jung³

et al. 2023

Korean J. Soil. Sci. Fert.

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Typical reclaimed lands located in coastal areas including Saemangeum are not suitable for cultivation of upland crops due to a high salinity and groundwater levels and low nutrient contents. Therefore, for sustainable crop cultivation, it is necessary to soil salinity, water content, and nutrients that are necessary for development of land management for upland crops cultivation. In this study, we investigated physico-chemical characteristics of soils including pH, electrical conductivity (EC 1:5 ), organic matter contents, available phosphorus (Avail. P 2 O 5 ), and exchangeable (Exch.) cations concentrations, as well as bulk density, hardness, and soil texture. Soil samples were collected from soil layers up to 120 cm at 20 cm interval of survey fields (80 ha) of Saemangeum reclaimed land. Groundwater levels and soil water contents were also monitored. The EC (0.14 -0.51 dS m -1 ) was lower than those of other reclaimed land in South Korea, indicating desalinization across 120 cm of soil depth, and pH (5.5 -6.9) was also lower in accordance of the removal of non-acid cations through desalinization. Soil organic matter (1.5 -5.2 g kg -1 ), and nutrient (Avail. P 2 O 5 17.2 -35.5 mg kg -1 and Exch. calcium 0.8 -1.0 cmol c kg -1 ) contents were lower than the standard levels for upland crop cultivation (Organic matter: 20 g kg -1 , Avail. P 2 O 5 : 300 mg kg -1 , Exch. calcium: 5 cmol c kg -1 ). However, the soil hardness (15.1 -18.6 mm) was lower than the suitable level (21 mm) for crop cultivation. Meanwhile, water contents of top soil (0 -20 cm) were greatly changed by rainfall pattern; in particular, the soil located near the coastal areas had a large rise in groundwater level during rainfall. Our study provide key information on the changes in soil physico-chemical properties across soil depth for Saemangeum reclaimed land, which was necessary for development of land management practices for cultivation of upland crops.

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Advances in the ECe prediction from EC1:5

Park,

Baek,

Shin

et al. 2024

Korean J. Soil. Sci. Fert.

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Emergence Rates of Sesame, Perilla, Peanut, and Sorghum under Different Soil Moisture Conditions and Amendment Treatments in Saemangeum Reclaimed Land

Cited by 3 publications

References 5 publications

Conversion Factors for Electrical Conductivity of 1:5 Soil-Water Extracts to Saturated Paste of Reclaimed Tideland Soils are Affected by Sand Contents

Conversion Factors for Electrical Conductivity of 1:5 Soil-Water Extracts to Saturated Paste of Reclaimed Tideland Soils are Affected by Sand Contents

Soil Physico-Chemical Properties and Groundwater Levels at the “Agricultural Life Science Sites” in Saemangeum Reclaimed Land

Advances in the ECe prediction from EC1:5

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