What is the maximum annual amount of nitrogen that may be applied per 1000 sq ft as enhanced efficiency fertilizer?

The correct answer reflects the regulation regarding enhanced efficiency fertilizers in Maryland. Enhanced efficiency fertilizers are designed to minimize nitrogen loss from leaching and volatilization, thus improving their effectiveness and environmental safety. According to Maryland's guidelines, the maximum annual amount of nitrogen that can be applied per 1000 square feet of enhanced efficiency fertilizer is 2.5 pounds. This limit is set to promote responsible nutrient management and protect water quality by reducing the potential for excess nitrogen runoff into waterways.

This maximum application rate helps ensure that the nitrogen supplied will be utilized efficiently by plants, reducing the risk of oversaturation that can lead to environmental issues. Understanding these limits is crucial for applying fertilizers correctly and sustainably in agricultural and landscape practices.