The covered area is suitable to protect all inorganic fertilizers (e.g. powders, granules or liquids) from atmospheric influences (e.g. sunlight, frost and rain, high temperature). Based on a risk assessment (fertilizer type, weather conditions, storage duration and location), plastic coverage could be acceptable. It is permitted to store lime and gypsum in the field. As long as the storage requirements on the material safety data sheet are complied with, bulk liquid fertilizers can be stored outside in containers.