Sub-Irrigation Arrangement

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Pictured is an arrangement in a rock garden to insure sub-irrigation. The pocket of soil in the rocks is filled with the proper soil mixture. The water may be let in at (A) with a rock just in front of the pipe to insure the water’s downward passage.


L. H. Bailey Standard Cyclopedia of Horticulture (New York, New York: The MacMillan Company, 1917) volume 1, page 262


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