PURPOSE:To produce a soil-solidifying agent and a liq. soil-solidifying agent both used to solidify soil in root wrapping of a tree. CONSTITUTION:A soil-solidifying agent to solidify the soil around a root of a tree after excavation is produced by stirring a mixture of calcium chloride, ground straws, and ground wood chips. The agent is mixed with water and stirred to give a liq. soil-solidifying agent.