银杏(Ginkgo biloba L.)常栽植在古老寺院周围或当作行道树,很少进行山地造林。1959年发表了山形大学教授故斎藤孝藏博士在山形县发现的一片全国唯一的栽植在山地上的银杏人工林调查结果。在过了二十余年后,对该林分生长过程又进行了调查,结果概括如下。 Ginkgo biloba L. is often planted around ancient temples or as street trees, with few afforestation. In 1959, the result of a survey of the only planted ginkgo plantations in the country found in Yamagata Prefecture by Professor Takashi Tadao, a professor at Yamagata University, was published. After more than twenty years, the growth of the forest was investigated again and the results are summarized as follows.