Abstract
The historical changes of seeding work, the typical slope revegetation method, is possible to divide into five periods as follows; 1)The early period after creation(1927-1948). 2)The spreading period of modern revegetation work with manpower(1947-1958). 3)The spreading period of rapid revegetation technique using exotic grasses with machineries(1959-1985). 4)The spreading period of rapid reforestation technique by fast growing species mainly using leguminous shrub species(1986-1995). 5)The developing period of nature restoration technique using endemic arboreous species(1996-). The evaluation basis of vegetated condition after slope seeding has been described to a official guide book, "The Standards of Slope Stabilizing Works." It was mainly revised three times after first edition in 1972, and also the point of evaluation basis changed from the vegetation coverage to the density of woody plant through the 3rd period and the 4th period. Consequently, a lot of survey reports after 1990 tend to mention only vegetation coverage, density, and height growth requested in the evaluation basis by the standards, and, the plant sociologic surveys are not used. Recently main purpose of slope seeding has been developing from the erosion protection to the nature restoration in the current of the 5th period. At present the importance of advanced monitoring methods for vegetation maintenance and plant sociologic survey to evaluate the plant succession is increasing.
