Soil solutions were collected by zero-tension lysimeters at Kwangju, Kyunggi Province to estimate differences in ion concentration among species and horizons. Zero-tension lysimeters were installed in O, A, and B horizons in Larix leptolepis, Pinus koraiensis, and Quercus mongolica stands. Soil solution samples were collected from September 1996 through August 1998 and analyzed for K^+, Na^+, NH₄^+, Mg^(2+), Ca^(2+), Al^(3+), Cl^-, SO₄^(2-), NO₃^-, and PO₄^(3-). The experimental site had high nitrogen loading from the atmosphere, and N03 was positively correlated with K^+ and Mg^(2+). However, N03^- and NH₄^+ showed a positive correlation only in the O horizon of Q. mongolica stand. Mg^(2+) deficit in the soil was predicted owing to the positive relationship of Mg^(2+) with NO₃^-. Concentrations of K^+ and Ca^(2+) in soil solution were estimated higher in L. leptolepis than in other stands because of high leaching from the plant. Concentration of Al^(3+) in soil solution was negatively correlated with soil solution pH. Mean soil solution pH of A and B horizons in P. koraiensis was lower than 4.7, however the Al^(3+) concentration was lower than the toxic level to plants.