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http://dx.doi.org/10.17137/korrae.2019.27.4.71

Estimation of Agricultural By-products and Investigation on Nutrient Contents for Alternatives of Imported Oil-cakes  

An, Nan-Hee (Organic Agriculture Division, National Institute of Agricultural Sciences)
Lee, Sang-min (Organic Agriculture Division, National Institute of Agricultural Sciences)
Cho, Jung-Rai (Organic Agriculture Division, National Institute of Agricultural Sciences)
Lee, Cho-Rong (Organic Agriculture Division, National Institute of Agricultural Sciences)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.27, no.4, 2019 , pp. 71-81 More about this Journal
Abstract
This research was conducted to improve availability of agricultural by-products, national natural resources that could be used as fertilizer source, by estimating the amount of production and collecting main contents of fertilizer substances from previous studies and data, in order to be used as basic data to investigate national resources that could be used as alternatives for imported oil-cakes in the future. Conversion factor was used to estimate annual production of agricultural by-products for main 34 crop types in 2018. For total agricultural by-products, rice straws accounted at 50.3% for the highest proportion, followed by 8.7% of rice husks, showing that by-products from rice harvest accounted at 59.0% for all by-products. Further, there were listed the contents of fertilizer substances (nitrogen, phosphoric acid, potash) in 40 types of by-products from agricultural areas. The average contents of nitrogen, phosphoric acid, and potash in agricultural by-products were 1.43%, 0.59%, and 1.90%, respectively. As a result of estimating the annual nitrogen supply amount from 26 agricultural by-products in 2018, it was found that it could supply 44,911 tons of nitrogen. The investigated by-products contained fertilizer substances such as nitrogen, phosphoric acid, and potash, but the contents were lower compared to castor oil-cake used as main component of organic fertilizer. Therefore, resource management plan needs to be established for efficient use of by-products because time, location, and nutrient content of agricultural by-product production were extremely different. Research on fertilizer and manure using agricultural by-products need to be conducted to develop and distribute alternatives for imported oil-cakes.
Keywords
agricultural by-products; castor oil-cakes; fertilizer source; organic fertilizer;
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Times Cited By KSCI : 1  (Citation Analysis)
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