Issue 16 Full
The purpose of the following description and drawing is to explain how to apply liquid chemicals (fungicides, fertilizers, etc.) to nursery beds by injecting them directly into the overhead sprinkling lines. A venturi tube temporarily set into the overhead line makes such a practice simple and cheap. A tube of this kind is inexpensive and when set in the line and connected with hoses t o a suitable tank of the chemical, it does its job automatically merely by the force of the irrigating water flowing normally through the lines. No outside source of power, pumps, or other moving parts are required.
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Publication: Tree Planters' Notes - Issue 16 (1954)