| 摘要 |
PURPOSE:To obtain artificial ridging useful for lawn planting and rice plant seedling rearing medium, etc., having low decomposability with bacteria, slightly causing concentration disorder resulting from excessive festilizing, excellently preventing infertility of soil, comprising finely cut material of bark layer of cedar, etc. CONSTITUTION:The objective artificial ridging comprising finely cut material of bark layer of cedar and/or hinoki (Japanese cypress). The artificial ridging is mixed with sand and/or soil in a weight ratio of >=0.3% to improve soil. |
