From steved@ncatark.uark.edu Sat Feb 21 00:33:34 1998 Date: Fri, 20 Feb 1998 14:14:09 +0000 From: Steve Diver To: sanet-mg@shasta.ces.ncsu.edu Subject: Drip irrigation in organics: trouble shooting A grower is raising thousands of organic greenhouse herbs via pot culture and has trouble with clogging in the drip irrigation system. Diluted sulfuric acid is used as a clog preventer in drip systems in standard horticultural production systems that do not adhere to certified organic standards. What are some alternatives that would pass for certified organic? Does anybody have any tips on acceptable vs prohibited, efficacy, sources, costs, and dilution rates for the following? Potential substances to un-clog drip irrigation tubes and emitters in certified organic horticulture production: * Baking soda * Acetic acid (vinegar, concentrated) * Phosphoric acid (food grade, concentrated) * Hydrogen peroxide (35%, concentrated) I'll pass on any suggestions. Thanks! Steve Diver ATTRA http://www.attra.org -- steved@ncatark.uark.edu To Unsubscribe: Email majordomo@ces.ncsu.edu with "unsubscribe sanet-mg". To Subscribe to Digest: Email majordomo@ces.ncsu.edu with the command "subscribe sanet-mg-digest".