Effect of organic and inorganic soil amendments on soil properties and crop growth in reclaimed land

Abstract

As arable land continues to decline in South Korea due to rapid industrialization and urban expansion, reclaimed soils are being considered as a viable alternative for agriculture. However, these soils are often hindered by issues such as excessive salinity and poor physical structure. This study examined the impact of several organic (cocopeat, black peat, soft rice husk) and inorganic (biochar, zeolite, hydrogel) soil amendments—used both individually and in combination—on improving soil properties and supporting crop growth. Results showed that mixed applications consistently outperformed single-material treatments, particularly in enhancing soil quality and promoting plant development. Among the variables tested, Sodium Adsorption Ratio (SAR) and Exchangeable Sodium Percentage (ESP) were found to be strongly associated with crop performance. These findings suggest that integrated amendment strategies may offer an effective approach to rehabilitating saline reclaimed soils, though further field-based studies are needed to confirm their practical benefits.