A soil survey of ninety-five ”Hai-li” tangor orchards in Hsin-chu county was made in 1998 to 1999. The pH value of the soils obtained from about 60% of orchards were noted lower than the optimum range (pH 5.0-6.5) for orange growth. There were 60% of top-soils and about 40% of sub-soils that soil organic matter contents were above 2%. In most of the soil, available P content was too high, while available K and Ca were too low, especially available Ca. According to the ratio among Ca, K and Mg, Ca content was significantly lower than other two nutrients. Root rot nematodes were found almost in the soil of all the orchards. Further investigation of damage caused by nematode is also needed.