• Korean Journal of Environmental Agriculture
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• v.14 no.1
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• pp.15-22
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• 1995

This study was carried out to investigate the deposition aspect of acid precipitation in rural area of Chonbuk province by analysis of the chemical components in the precipitation at National Honam Agricultural Experiment Station, RDA in the suburbs of Iri from Jan. to Dec. in 1992. The results are summarized as follows: 1. The frequency of acid precipitation was 82.5% in 1992 and the month of the lowest frequency of 17% was June. 2. The pH range of the most precipitation amount was pH $4.5{\sim}5.0$ of 54.0% and the amount and ratio of the precipitation below pH 4.0 were 9.6 mm and 1.1%, respectively. 3. The seasonal acidity of precipitation was Summer(4.78)>Fall(4.59)>Spring(4.52)>Winter(4.16). 4. The components showed significant correlation with pH value were $SO_4^{2-}$ and $NO_3$ and the equivalence ratio between two components was 2.85 : 1. 5. The order of the major ion concentration in the precipitation was $SO_4^{2-}$>$NH_4^+$>$Cl^-$>$Ca^{2+}$>$NO_3^-$>$Na^+$>$H^+$>$K^+$>$Mg^{2+}$ and the equivalence ratio of total anion to cation was 1.20. 6. Deposition amount of nitrogen ($NO_3-N$ + $NH_4-N$) and potassium ($K_2O$) were 1.19 and 0.53 kg/l0a/year, respectively.