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Physicochemical Properties of Upland Soils under Organic Farming  

Cho, Hyun-Jun (National Institute of Crop Science and Technology, RDA)
Hwang, Seon-Woong (National Institute of Crop Science and Technology, RDA)
Han, Kyung-Hwa (National Institute of Crop Science and Technology, RDA)
Cho, Hee-Rae (National Institute of Agricultural Science and Technology, RDA)
Shin, Jae-Hun (National Institute of Agricultural Science and Technology, RDA)
Kim, Lee-Yul (National Institute of Agricultural Science and Technology, RDA)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.42, no.2, 2009 , pp. 98-102 More about this Journal
Abstract
Various physical properties of soils were investigated in the areas where organic farming had been practiced widely, for upland fields. The investigations were also conducted in the nearby fields under conventional to find out the influence of organic farming on the physical properties of soils. The investigated properties involved bulk density, hardness, shearing resistance, friction resistance, sinking depth of small rectangular board, water stable aggregates and the depth of soil available to plants. By and large, the practice of organic farming tended to improve all of the physical properties soils, investigated in upland soils. However, in case of water stable soil aggregates in upland soils, the reverse was previous data; in those soils water stable soil aggregates were less under organic farming. It was suspected that this might be due to intensive application of the organic materials with high C/N ratio like wood chips and wood bark. The contents of OM, Av. P2O5, and Ex. cations were higher in organic farming than those of nearby fields under conventional, due to heavy organic matter application. From the results, It could be concluded that soils under organic farming were looser and softer than those under conventional as shown by lower bulk density and hardness, but that the effect of organic farming on water stable aggregates were low.
Keywords
Soil physicochemical properties; Hardness; Bulk density; Aggregate; Organic farming;
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