What type of fertilizers contain coated nitrogen for slow release?

Coated soluble materials are designed to provide slow-release nitrogen to plants through a coating that regulates the release rate of nitrogen. This coating helps in minimizing nitrogen loss from leaching and volatilization, while also ensuring that the nitrogen is available to plants over a more extended period.

The slow-release mechanism is particularly beneficial in managing nutrient availability, allowing for more efficient uptake by plants and reducing the need for frequent applications. This can lead to better plant health and growth, as well as lower environmental impact from fertilizer runoff.

While methylene ureas also function as slow-release nitrogen sources, they are specifically a type of polymer-coated urea rather than a general category. Granular fertilizers may contain various formulations that could include slow-release options, but they are not specifically characterized by coated nitrogen alone. Liquefied nitrogen fertilizers typically provide immediate availability of nitrogen, hence do not fall under the category of slow-release fertilizers.