SOIL CONDITIONER COMPOSED OF CHARCOAL OF JAPANESE PLUM

摘要

PROBLEM TO BE SOLVED: To obtain a soil conditioner capable of reducing a load to the environment, providing soil with growth promoting effect on various plants not only under nonfertilized conditions but also under fertilizing conditions by making the soil conditioner include powder of charcoal of Japanese plum. SOLUTION: This soil conditioner comprises powder of charcoal of Japanese plum produced from one or more materials selected from the group consisting of waste wood of Japanese plum, plum shell, plum seed and turion of the plum, or of used charcoal of Japanese plum utilized for cleaning waste liquor of plum vinegar or its treated solution. Preferably the powder of charcoal of Japanese plum is passed through a sieve of 1-10 mm. Soil comprising one or more selected from the group consisting of Akadama soil (a granular soil made of weathered red soil), Kanuma soil (soil of weathered pumiceous lapilli), leaf mold and compost, river sand or vermiculite is mixed with preferably 1-15% (v/v) of the soil conditioner to preferably improve soil.