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Effect of Organic Material Treatments on Soil Aggregate Formation in Reclaimed Tidelands  

Son, Jae-Gwon (Department of Rural Constrution Engineering, Chonbuk National University)
Cho, Jae-Young (Department of Bio-environmental Chemistry, Chonbuk National University)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.42, no.3, 2009 , pp. 201-206 More about this Journal
Abstract
It is generally accepted that organic materials are a significant factor on the soil aggregation formation but little information exists on how the formation and stabilization of aggregates in reclaimed tidelands. In this work, the effects of organic materials on the soil aggregate formation in reclaimed tidelands were determined. The soil was treated with 5 cm-size chopped fresh italian ryegrass residues (fresh organic material), commercial livestock compost with swine manure and sawdust (by product fertilizer), and fresh organic material + by product fertilizer (1 : 1 w/w) after ploughing at 20 cm soil depth. The three organic materials applied $2,000kg\;10a^{-1}$ every year. Water stable aggregate was estimated by wet-sieving method. Three years after the beginning of the experiment, water stable aggregate rate and MWD (mean weight diameter) were higher fresh organic material treatment than two other treatments. For improvement of physical property and structure of soil in reclaimed tidelands, fresh organic material treatment was more suitable than two other treatments.
Keywords
Aggregate; Organic material; Reclaimed tidelands; Soil structure;
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