In vegetable production, excessive use of micro-fertilizer can cause toxicity to vegetable production, and lack of micro-fertilizer affects quality and yield. The dosages of several major micro-fertilizers are described below. 1. Zinc sulphate: Generally, the dosage per acre is 1.5~2.5 kg, the soaking concentration is 0.02~0.05%, and the foliar spraying concentration is 0.1%~0.5%. 2. Copper sulfate: The general application rate per acre is 1.5~2 kg, the soaking concentration is 0.02~0.05%, and the foliar spraying concentration is 0.2~0.5%. 3. Manganese sulfate: The general application rate is 1~1.25 kg, the soaking concentration is 0.05%~0.1%, and the foliar application concentration is 0.05%~0.15%. 4, ferrous sulfate: the amount of 1 ~ 3.5 kg per acre (according to the soil acidity appropriate increase or decrease). Foliar application concentration is 0.2~1%. 5. Zinc molybdate: The application rate per acre is 30g~200g, the soaking concentration is 0.05%~0.1%, and the concentration of foliar application is 0.02%~0.05%.
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