PROBLEM TO BE SOLVED: To provide a molding which exhibits efficacies on weed suppression, fertilizer support and blowing sand prevention.SOLUTION: A lot of corroded barks, of such as Cryptomeria japonica and/or Japanese cypress, are piled up into a laden condition after stripping off from the xylem, anaerobic fermentation condition is generated within the laden barks, the natural barks, of such as the Cryptomeria japonica and/or Japanese cypress, are carbonized, and the natural barks, such as the Cryptomeria japonica and/or Japanese cypress after the carbonization, are crushed by a crusher to generate a molding consisting of fine corroded fibers. In the composition of mixing the molding into soil, the molding consisting of the natural barks of conifers, such as Cryptomeria japonica and/or Japanese cypress is injected with water to add moisture so that the water content is 33-63% before mixing the molding with soil, and silver ions ionized with electrodes made of silver are added.COPYRIGHT: (C)2015,JPO&INPIT【課題】雑草抑制や、肥料の抱持や、飛砂防止の効果を発揮する培土を提供する。【解決手段】スギ・ヒノキ等の腐食樹皮を、木質部分から剥ぎ取った後に、多量に積み上げて積載状態とし、該積載した樹皮の内部において嫌気性発酵状態を発生させ、該スギ・ヒノキ等の天然樹皮を炭化させ、該炭化後のスギ・ヒノキ等の天然樹皮を、クラッシャーにより圧砕し、細い腐食繊維よりなる培土とし、該培土を、土壌に混合する構成において、該培土を土壌に混合する前に、33~63%の含水率となるように水分を噴射加水するスギ・ヒノキ等の針葉樹の天然樹皮より成る培土であり、銀製の電極によりイオン化された銀イオンを付加したものである。【選択図】図1