PROBLEM TO BE SOLVED: To provide a method of promoting an effect-development for plants effectively improving a molybdenum deficiency disease, etc., and helping plants to grow satisfactorily.;SOLUTION: A rod-shaped effect-development promoting agent for plants having a molybdenum compound content of at least 1 wt.% is embedded in a trunk. The effect development promoting agent for plants is formed into a rod-like shape and comprises a base material which can be solidified and is water-soluble, and a molybdenum compound contained in the base material, in which at least 1 pt.wt. of the molybdenum compound is contained based on 100 pts.wt. of the base material.;COPYRIGHT: (C)2007,JPO&INPIT
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