Answering fall fertility questions
Fernandez says a desired benefit of anhydrous ammonia is that it kills nitrifying bacteria, preventing its conversion into a nitrate. To lengthen and enhance that process is the purpose of a nitrification inhibitor, such as N-serve, which is the most valuable when used while bacteria are active above 50 degrees F. Fernandez says, “The use of a nitrification inhibitor might not pay every year. For example, if the following spring is dry and cool, the inhibitor might not be as beneficial to enhancing ammonium recovery. However, the practice will overall ensure the greatest chance to protect your N investment and at the same time enhance environmental protection.”
He says ammonium sulfate is a good choice for no-till fields and is always best to apply it before soils freeze so it has the chance to dissolve and be absorbed into the soil. However, it will require a higher amount of lime because it is more acidifying than other nitrogen sources.
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