David Granatstein, Washington State University, recommends growers consider the following before using a mulch. • What is the volume needed? Using a 3-foot strip under the vine, an inch deep would equal 44 cubic yards per acre. • What is the bulk density? • What are you bringing in? Run a chemical analysis on the dry material. • How much nitrogen is released and when is it released? • What are the long-term effects? • Are there contaminants, weed seeds, pathogens, or odors? Chicken manures can contain arsenic. • What is the material’s longevity? • What is the impact on […]
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