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Simple! Learn how to calculate your nitrogen fertilization. Link to register for the Third Edition of the Coffee Growing Immersion with Gustavo Rennó https://wa.me/5535997625040 Link to talk to SimCafé Soluções https://wa.me/5535997625040 One correction; ammonium sulfate has approximately 18% nitrogen and 21% sulfur. In the video, I did not consider sulfur, considering it as an inert material. The coffee plant requires a very small amount of sulfur, around 13 kg per hectare, and we can obtain this nutrient in this amount through weed management practices. Because I was not concerned about sulfur in relation to fertilization, I made the mistake of not mentioning ammonium sulfate in the fertilizer.