The Orchid Doctor Articles under the Heading Ammonia

Ammonia Comments
AMMONIA: In Atmosphere Presence in the jungle, also in 19th C. orchid culture; conjectures and possibilities; refer to OR73-333; OR75-141 0
AMMONIA: Vapour as Fertilizer 19th. C. methods; pieces of carbonate of ammonia placed near heating pipes; soot and lime mixed dry, or, ammonia in solution, twice a week, OR73-333 0

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