Which foliar fertilizer can be used for vegetables?

Which foliar fertilizer can be used for vegetables? What is the concentration of foliar fertilizer sprayed on vegetables? Also ask experienced netizens to help introduce that vegetables grow well and are disease-free, which can be achieved by spraying foliar fertilizer, so the planting network has sorted out the foliar fertilizers that can be sprayed on all kinds of vegetables, which are listed below for netizens' reference. First, leafy vegetables: such as Chinese cabbage, Chinese cabbage, cabbage, celery, etc., foliar spraying is mainly urea, spraying concentration 0.3%-0.5%, can be sprayed with 0.3% rice vinegar solution. Second, melons and fruits vegetables: such as cucumbers, tomatoes, eggplants, peppers, beans, etc., foliar spraying is mainly composed of nitrogen, phosphorus, potassium mixture or multi-component compound fertilizer, such as 0.2% Mel 0.3% potassium dihydrogen phosphate solution, 0.5% urea plus 2% superphosphate plus 0.3% potassium sulfate solution, 0.05% rare earth micro-fertilizer solution and so on. Third, onion, garlic, root vegetables, potato vegetables: such as garlic, onions, radishes, carrots, potatoes, etc., foliar spraying is mainly based on phosphorus and potassium fertilizer, such as 0.2% potassium dihydrogen phosphate solution, calcium superphosphate and plant ash leaching solution. If there is a lack of trace elements in the soil of vegetable cultivation, it can be sprayed with trace element fertilizer. What are the advantages of foliar fertilizer? What are the methods of foliar fertilization