Manganese fertilizers are available in various forms, including manganese sulfate, manganese oxide, and chelated manganese compounds. Among these, manganese sulfate is widely used due to its high solubility and availability to plants. The choice of manganese fertilizer depends on several factors, including soil type, crop requirements, and the specific deficiency symptoms observed.
manganese fertilizer

For fish products in vacuum or modified atmosphere packaging, sorbate is added to prevent the growth of anaerobic bacteria. Anaerobic bacteria are capable of thriving despite the absence of oxygen. These microorganisms have the capability to metabolize trimethylamine oxide, the compound responsible for the “fishy” strong foul odor in fish. There are several ways sorbate is applied to fish. These include spraying, in ice, in packaging, in fat, as a powder or by immersion in sorbate solution. Commonly the fish is immersed in a solution of 0.5–2.0% sorbate and 15–20% NaCl (salt) prior to refrigeration.