How the Technology Works

Understanding polymer coating technology

ESN contains a urea granule nitrogen (N) within a micro-thin polymer coating. This coating allows water within the soil to move into the granule and dissolve the urea inside. The urea solution then moves out through the coating into the soil where it is available to the crop.

How does ESN know when a crop needs nitrogen?

The rate at which the urea solution moves out through the coating is determined by soil temperature and moisture. In cool soils when the crop is growing slowly, N release is slow. As the soil warms and crop growth increases, the granules release N more quickly and steadily. This continues throughout the growing season to keep up with rapid plant growth. The process is called temperature controlled diffusion, and it is why we say that ESN practically thinks for itself.

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