nitrogen use efficiency

What is the N-supplying Power of Your Soil?

SoilDx's picture

Q: Why are some soils more fertile than others?

Dr. Khan:

Most soils of the Midwestern USA are very fertile because they are moderate to high in organic matter, developed on deep loess deposits and have good nutrient and water supplying potential. These soils need less nutrient inputs from fertilizers, as opposed to those soils that are lower in organic matter with a limited rooting depth, and thus lower in overall nutrient supplying capacity.

Q: How much nitrogen is required by a crop over the growing season?

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