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为了研究涇河北部地广人稀于旱地区的造林綠化,給發展山区生产、迅速实現园林化、控制水土流失、根治黄河寻求費省效宏的造林方法和速生树种,在洪德地区进行了初步的調查研究工作。調查的方法是以新造林地为主,結合群众以往所种植的林木进行树木生長及造林工程标准效益的观測以取得对比資料。調查的重点在鋪溝流域及洪德附近地区的群众造林和国家造林的林地上。通过調查已經取得一些資料,現分述于后:
In order to study the afforestation and afforestation of the Jinghe River in the sparsely populated and dry areas in north China, afforestation methods and fast-growing tree species for developing mountainous areas, rapidly realizing gardenation, controlling soil and water loss, The preliminary investigation and research work. The method of investigation is based on the newly afforestation land, and the comparison of standard benefit of tree growth and afforestation project based on the past trees planted by the masses. The focus of the survey is on the poplar forests in the Tacun River Valley and in the areas around Hunde, and on afforestation sites in the country. Some of the information that has been obtained through the investigation is as follows: