| 摘要 |
PROBLEM TO BE SOLVED: To make effective use of pine bark or its processed product, especially a residue obtained by extracting pine bark with a polar solvent. SOLUTION: A plant growth agent contains pine bark or its processed product. A fertilizer contains the plant growth agent. The plant growth agent preferably contains the residue obtained by extracting pine bark with the polar solvent. COPYRIGHT: (C)2006,JPO&NCIPI
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