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How Long Does Fertilizer Effectivity Last?

How Long Does Fertilizer Effectivity Last?


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Generally speaking, fertilizer effectivity as below (for reference only):


Ammonium bicarbonate takes effectivity on the same day, which can last 15 days;

Ammonium chloride takes effectivity in three days, and lasts 25 days;

Urea, 7 days effectivity taken with fertilizer effect period of 45 days;

Compound fertilizer takes effect in 10 days, and its effect period is 90 days.

Biological fertilizer generally takes effect  about a month, the effect is not obvious in the long growing cycle of crops, but the fertilizer effect can last 6-8 months