Modern agriculture develops into scale and efficient mode and whole areas of land promote big planters to adopt more advanced agricultural production technology and equipment. Airplane spraying water-soluble fertilizers( such as zinc sulphate heptahydrate) has been more commonly applied in big farms and fields and also accepted by more farmers. Referred with the local climate and plants practical growing, trace elements of water-soluble fertilizers can be loaded on agricultural airplane for the large area spraying. [Read More]