Answer: When applying biological fertilizer, use ditch or acupoint application. It is strictly forbidden to directly irrigate water and fertilizer such as unfertilized human and animal manure; try not to mix biological fertilizer with quick-acting nitrogen fertilizer such as urea and ammonium bicarbonate to avoid killing. Biological bacteria, reduce fertilizer efficiency; use when the sensation is good and the temperature is suitable. When the temperature is lower than 5 °C, the biological fertilizer and the organic fertilizer and a large amount of elemental fertilizer compound fertilizer can exert the maximum efficiency.
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