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BACKGROUND: The reclaimed lands for agricultural use managed by the Korean government is consisted of 17,145 hectares of lands under construction and 13,384 hectares of completed lands. In order to utilize these reclaimed lands as competitive agricultural complexes, the government is preparing to develop comprehensive development plans for multiple purposes. For rational land-use planning and soil management, information of the soil chemical properties is necessary. METHODS AND RESULTS: From 2013 to 2016, soil samples were collected from 85 representative sampling sites of the reclaimed lands and analyzed for soil chemical properties including electric conductivity (EC), pH, soil organic matter (SOM), and nutrients. The annual mean soil EC ranged from 5.1 to 8.3 dS m and have continued to decrease over the years (estimation equation with EC as dependent and year as independent variable was y = 0.0736x 1.4985x + 9.8305, R = 0.9753). The pH ranged from 7.3 to 7.6, which was higher than the optimum range (5.5~7.0) for agricultural soils. Soil organic matter (8 to 11 g kg) was lower level than the optimum range (20~30 kg). Available silicate (Av.SiO2) ranged from 169 to 229 mg kg, which was close to the minimum content (≥157 mg kg) for rice paddy field. Available phosphate (Av.P2O5) content (24~39 mg kg) was lower than the optimum range (80~120 mg kg) for rice paddy field. CONCLUSION: For efficient agricultural use of reclaimed lands under government management, our results suggest that the application of organic matter and supplying deficient nutrients as well as desalinization is required.

Soil Chemical Properties of Reclaimed Tide Lands Under Government Management in Korea: Results of 4-years monitoring