PROBLEM TO BE SOLVED: To provide a construction method of culture soil, being made from decayed bark of cedar and cypress in constant quality, capable of eliminating irregularity in a finished state of construction.SOLUTION: A weighing-and-mixing unit U is arranged at a construction site. The weighing-and-mixing unit U comprises: a decayed bark culture soil hopper 1； a mixed soil hopper 2； a decayed bark culture soil weighing conveyor 3 under the decayed bark culture soil hopper 1； a mixed soil weighing conveyor 4 under the mixed soil hopper 2； a weighing-and-mixing conveyor 8 under the decayed bark culture soil weighing conveyor 3 and the mixed soil weighing conveyor 4； and a mixer 9 at a downstream side of the weighing-and-mixing conveyor 8.【課題】施工仕上がり状態の不揃いが解消でき、同じ品質のスギ・ヒノキ等の腐食樹皮より成る培土の施工方法を提供する。【解決手段】腐食樹皮培土ホッパー１と、混合土ホッパー２と、該腐食樹皮培土ホッパー１の下方の腐食樹皮培土計量コンベア３と、該混合土ホッパー２の下方の混合土計量コンベア４と、前記腐食樹皮培土計量コンベア３と混合土計量コンベア４の下方の計量混合コンベア８と、該計量混合コンベア８の下流側の混合ミキサー９とを配置した、計量混合ユニットＵを施行場所に配置する。【選択図】図１
