Five in one super chelating zinc + boron + silicon fertilizer

Formula: zinc ≥ 0.2%, boron ≥ 0.1%, calcium oxide ≥ 15%, effective silicon ≥ 10%, magnesium oxide ≥ 3%, sulfur ≥ 4%, nitrogen ≥ 6%, humic acid ≥ 1%, specification: 20kg