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Detailed Explanation of Key Points of Virus-Free Fruit Tree Planting Technology
1 bag of Qinongsu (10 grams), 1 bag of 72% agricultural streptomycin (15 grams), 15 grams of copper sulfate, mix the three, add two liang of edible vinegar to foam and dissolve, then add 30 jin of water and spray or drench the roots. (Referred to as agricultural streptomycin copper sulfate mixed liquid). Then add 20 grams of zinc sulfate (zinc fertilizer)