Abstract: Sodium hydrogen carbonate powder and/or an aqueous dispersion or solution of sodium hydrogen carbonate is sprayed to weeds by gravity Drop or low-pressure spraying, or blasted to weeds together with compressed air at an ejection pressure (gauge pressure) of 1-10 kgf/cm2, using a high-pressure dry-blasting apparatus.

Abstract: Sodium hydrogen carbonate powder and/or an aqueous dispersion or solution of sodium hydrogen carbonate is sprayed to weeds by gravity Drop or low-pressure spraying, or blasted to weeds together with compressed air at an ejection pressure (gauge pressure) of 1-10 kgf/cm2, using a high-pressure dry-blasting apparatus.

Abstract: A method of artificially forming patina on a copper product surface comprising the steps of blowing granular sodium hydrogen carbonate powder onto the copper product surface to clean and roughen it; wetting the surface with water; and depositing granular sodium hydrogen carbonate powder onto the wet copper surface; thereby forming patina on the copper surface. The step of wetting the copper surface and the step of depositing granular sodium hydrogen carbonate powder onto the wet copper surface are preferably repeated several times. The copper surface is preferably covered with porous sheets during or after the above steps.

Abstract: Plant tissues of mosses such as cut tissue pieces, gametophores, calluses, protonemata, spores, gemmae, subterranean stems or rhizoids are purely cultured in a culture medium to generate seedlings (cultigen) corresponding to plumules, and the seedlings are sown onto a nursery at a desired colony density, followed by appropriate caring.