Magnesium sulfate also has a beauty effect in green leafy vegetables! Before cultivating the land, use 10-15 kg of magnesium sulfate mixed with decomposed farm manure or organic fertilizer per mu of land, mix well and spread. Topdressing: Use 10-13 kg of magnesium sulfate per acre of land to flush calcium nitrate sol into the crop field with water, if it is a fruit tree, apply 250-500 g of...