University of California Small Grains
University of California Small Grains
University of California Small Grains
University of California
University of California Small Grains

N-rich reference zones for in-season N fertilizer management

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The N-rich reference zone is a relatively small area within a field where extra N fertilizer is added at the beginning of the season. This extra fertilizer ensures that the reference zone is not N limited between planting and the time when an in-season fertilizer decision is made. When a grower is determining whether and how much N fertilizer to add in-season, plant and soil measurements from both the reference zone and the broader field are compared to understand whether the broader field is sufficient in available N. Read more.

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