of planted L α rix kaempferi forestS i皿 heavy snow areas − Case st 腿dy of relatively o 且 d ・ aged stands in the Shonai di8 ・ triCt, Yamagata Prefecture − . Jpn. J. FoLPIann . 40 ; 75 -83 ,2006 The authors studied the present conditions of six Larix kaeml ) feri plantations to investigate the management ofrelatively old stands in heavy snow areas . The forests were 50 to 55 years old and 50f the stands had not been thin − ned for 300r more years . In four of the stands , stem volumes were lower

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... han that of the nor − mal yield table . Although broad − leaved trees were llot abundant in the upper stories , many merchantable broad − leaved trees were found in the middle and the lower stories of the forests . Competition between trees in the upper storles was very severe , and many trees were dead. We estimated that by extensive management without