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Herbicide-Contaminated Manure: Test Before Use

Grazon (aminopyralid) half-life in soil is >100 days. Tilling, sun, and water help degrade it. Test manure by growing 3 bean seeds or a tomato transplant in 1:1 manure:potting soil for 2-3 weeks. Normal growth = safe.

About Gardening: Soil Testing in Arizona: Private Labs, High Cost, Nearby Alternatives; Finding 'Porter' Tomato Seeds: Two Online Sources; Saving Blighted Tomatoes in Wet Australian Summer; Best Soil for Tomato Plants: Preparation, Testing, and Amendment Guide; Uses for Goat Manure: Fertilizer, Mulch, and Compost Applications; Heat-Tolerant Tomato Varieties; Herbicide-Contaminated Manure Kills Garden Plants: Picloram Persists; Tomato Herbicide Damage from Grass Clippings: Classic Cupping Symptoms; Brown Patch in Zoysia: Why Soil Tests Won't Detect It; Building a DIY Wick Applicator for Targeted Herbicide Application

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