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Chemical Properties Distributions of Commercial Organic By-product Fertilizers  

Lee, Chang-Ho (Division of Environmental Sicense and Ecological Engineering, College of Life and Environmental Sciences, Korea University)
Yoon, Young-Man (Division of Environmental Sicense and Ecological Engineering, College of Life and Environmental Sciences, Korea University)
Ok, Yong-Sik (Division of Environmental Sicense and Ecological Engineering, College of Life and Environmental Sciences, Korea University)
Lim, Soo-Kil (Division of Environmental Sicense and Ecological Engineering, College of Life and Environmental Sciences, Korea University)
Kim, Jeong-Gyu (Division of Environmental Sicense and Ecological Engineering, College of Life and Environmental Sciences, Korea University)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.37, no.1, 2004 , pp. 1-6 More about this Journal
Abstract
Agricultural recycling of livestock wastes by composting has lots of beneficial effects on crop production and soil fertility. Most of composts are made from pig manure and water content controller such as saw dust, bark, rice hulls etc. by aerobic processing. But the insufficient supply of saw dust, bark etc. cause the indiscreet use of industrial waste having heavy metals and toxic synthetic chemicals. This research investigated the present quality status of organic by-product fertilizers, and suggested the way of quality interpretation under the statistical approaches based on median, mean and weighted average value. Since the data of one hundred of samples for heavy metal contents (Cd, Pb, Cu, and Cr) and OM/N showed extremely left-skewed distribution, the median was more useful than the mean in representing the characteristics of distribiition for each items. The weighted average value will be a useful index for the quality based on the total amount of producing.
Keywords
Compost; Heavy metal; Livestock waste; Organic by-product fertilizer;
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