Soil moisture properties under the pure and mixed plantations of Pinus koraiensis and Frax inus mandshurica were measured and analyzed. The result showed that for each soil layer or the whole soil profile

the soil bulk density under the mixed plantation was lower than that of the pure plantation of Pinus koraiensis. But the total porosity

capillary porosity

non-capillary porosity

soil maximum moisture capacity

capillary capacity

field capacity

wilting point

available water capacity

water storage capacity

permeating coefficient under the mixed plantation were all significantly greater than those of the pure plantation of Pinus koraiensis

with the relative increases averaged over the entire profiles being 19.17%

21.50%

12.17%

32.68%

24.29%

42.22%

19.72%

27.71%

12.17% and 39.44%

respectively.The results showed that the soil pore condition in the mixed plantation

compared with the pure plantation

was improved

resulting in better functionality of water and soil conservation.