The Orchid Doctor Articles under the Heading Carbonate of Ammonia

Carbonate of Ammonia Comments
CARBONATE OF AMMONIA: As Fertilizer Small pieces, walnut size are placed near the heating pipes and their evaporation carries nitrogen to plants where it seems to be absorbed; one pound per year can be used in a greenhouse 20 ft, by 12 ft.; European, used up to about 1940. OR72-186; 228 0

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