Micronutrients: Functions, Sources and Application Methods
other mineral elements that make up the plant account for only 1.5% of the dry weight (0.15 x 0.10 = 0.015). Three main elements are nitrogen, phosphorus, and potassium (N, P, K) and are required in abundance. They must be readily available through soil medium or fertilizer. The secondary elements are sulfur, calcium, and magnesium (S, Ca, Mg).
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