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Ammonium Sulphate is a salt-based fertilizer used to lower the pH in alkaline soils. In the soil, ammonium ion is released and forms a small amount of acid, lowering pH balance in the soil, while contributing essential nitrogen for plants.
It contains 21% nitrogen making an excellent fertilizer for all growing plants, including evergreens. Due to the 24% Sulfur content, ammonium sulfate will lower the pH of the soil as well, so you need to make sure your pH level doesn't drop too much.
It is important to have your soil pH tested before adding Ammonium sulphate as its efficacy will drop significantly if your grow mediums pH is above 7.
Knowing how to apply urea fertilizer is important to get the most out of your urea fertilizer. Minimize ammonia loss by applying on a cooler day with little to no wind. Sprinkle the urea fertilizer evenly across the close to the root zone of plants. Make sure to wet the soil before adding urea fertilizer. Before urea turns into nitrates, which your plants need, it becomes an ammonia gas. Because it turns into a gas, it easily escapes from the surface of the soil, applying the urea to wet soil helps incorporate the urea before the chemical reaction can take place. Allows for more ammonia to be trapped in the soil.
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