Which fertilizers should not be applied in autumn? In the fall, the summer residents are already starting to prepare the soil for the next season. Is it possible to add ammonium sulfate to the soil at this time of the year and which fertilizers are better not to use, answered Andrey Tumanov, Chairman of the Council of the Union of Gardeners in Moscow. Ammonium sulfate is a nitrogen fertilizer (21% nitrogen), but due to the high mobility of nitrogen, it should not be applied in the fall - it will be washed out of the soil. In addition, ammonium sulfate oxidizes the soil, and we often have an excess of acidity, which makes the plants worse. In agricultural production it is often used as an ingredient for explosives. Carbamide (urea) is more suitable for gardeners - it contains 46% nitrogen, it is a spring fertilizer; In addition, it helps to partially suppress the spores of fungal diseases (for example, scabies). Fresh manure cannot be applied: use rotted manure - for digging or composting. Other fertilizers are less important.