The amounts of big branch litter were measured for three years from 1976 to 1978 in a deciduous broad-leaved forest at Sanbe Forest of Shimane University. This paper also deals with the analysis of the sizes of branch litter.
1. The amounts of big branch litter were much at the month visited by typhoon and at the season of snow fall. The annual amounts of big branch litter showed sharp fluctuation. The amounts of big branch litter were 1.4 times as much as those of branch litter measured by small litter traps.
2. The diameter and length of branch litter varied in the range of 0-20mm, 0-100 cm, respectively. The branch litter under 4 mm of diameter and 30 cm of length accounted for 80% of total branch litter. The specific gravity of branch litter varied by the rotted-degree of branch litter. The bigger the diameter of branch litter was, the more it was decomposed.