▎ 摘　　要

NOVELTY - Method for improving crop involves culturing the target crop in a solid gelled medium containing graphene oxide nanosheets, agar and nutrients, where the graphene oxide has a carbon and oxygen ratio of 1:1-2:1. USE - The method is useful for improving crop by increasing at least one chosen from number of buds and number of flowers of the crop, accelerating at least one chosen from appearance and flowering of blossoms, and improving flower. The crop is at least one chosen from Arabidopsis thaliana, wheat, lettuce, tomato, and eggplant (all claimed). ADVANTAGE - The method simply improves crop characteristics.