METHOD FOR PREPARING SEEDLING-RAISING CULTURE SOIL, SEEDLING-RAISING CULTURE SOIL AND SET FOR PREPARING SEEDLING-RAISING CULTURE SOIL

PROBLEM TO BE SOLVED: To prepare a seedling-raising culture soil that causes no collapse of the root pot part or no deficiency in the root part, when the growing seedlings are transplanted with machine, by suppressing the poor solidification and also the deterioration of solidification performance with time in the seedling-raising culture soil. SOLUTION: A seedling-raising culture soil-solidifying agent is added to the seedling-raising culture soil base material on the sowing time, thereby the poor solidification of the seedling-raising culture soil and the deterioration of solidification performance with time can be suppressed. The seedling-raising culture soil-solidifying agent means a substance that can react with multivalent cation included in the seedling-raising culture soil base material and can solidify the culture soil and a high molecular compound bearing carboxyl group or its salt and sulfonic acid group or its salt. COPYRIGHT: (C)2007,JPO&INPIT