wheat-agronomy

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A nitrogen index helps predict wheat yield across high- and low-protein varieties

OpenAlex · 2026-07-10

Researchers tested whether a simple nitrogen measurement called the Nitrogen Nutrition Index could predict wheat grain yield and protein content across varieties that naturally differ in how much protein they pack into their seeds. Understanding this link could help farmers apply just enough nitrogen fertilizer to hit yield and quality targets without waste.

The Nitrogen Nutrition Index correlated with grain yield across wheat genotypes with contrasting grain protein content

Varieties differing in grain protein concentration showed distinct nitrogen uptake and use patterns that the index could capture

The index offers a practical mid-season diagnostic to link nitrogen status to expected yield outcomes

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