| 摘要 |
PROBLEM TO BE SOLVED: To provide a sports ground capable of securing semipermanently excellent soil conditions (water permeability, air permeability and retention of fertilizer). SOLUTION: A soil admixture is prepared by coating rubber chips with a soil-aggregating agent and is intermixed with soil by performing incorporating and stirring in a specified content and over a specified depth in the lawn vegetation ground such as a park or a sports ground. The size of the rubber chip of the soil admixture is about 1 to 1,000 mm3 and the soil-aggregating agent is a polycationic high-molecular organic compound. The soil admixture is incorporated with soil in an amount of 2-20 kg based on 1 m2 of the ground and is stirred in such a way as to be laid underground in depth ranging from 10 cm to 30 cm below the ground surface. |
