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Fertilizing Flax for Zinc Deficiency
Flax is susceptible to soils deficient in zinc. Situations conducive to zinc deficiency includes soils with very low or low zinc test levels, low organic matter content, high ph, and coarse textures. Plant deficiency symptoms include leaf chlorosis, plant stunting, and growing point death. After the growing point dies, axillary buds develop to form many branches. This in turn will delay crop maturity.
If the soil analysis (using the DTPA test) indicates very low or low levels of zinc (0 to 0.5 ppm) then 10 pounds per acre of actual zinc should be applied. About 3 to 5 pounds per acre of zinc should be applied to medium-testing soils (0.51 to 0.75 ppm) and 1 to 3 pounds per acre of zinc is suggested on high-testing soils (0.75 to 1 ppm). Zinc sulfate, which contains 36 percent zinc, is a common zinc fertilizer for soil application.
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