Abstract: The postponed spring sowing time due to the excessive soil moisture happened to a different extent in Dandong District every year.Based on the meteorological and soil moisture data at 10cm depths represented the plough layer from 1987 to 2006,the status of the soil moisture in the typical spring sowing dates,such as March 18th,April 18th and April 23rd,was analyzed and The drought and waterlogging were assessed by Z-index method.The results showed that the years with the normal range of the soil moisture during the spring sowing time were only taken 20%,and 80% of years were with an excessive soil moisture,namely with the waterlogging.

Key words: Spring sowing time, Spring sowing time, Soil moisture, Drought and waterlogging, Z-index