Category Archives: Yield Mapping

New OSU Perennial Ryegrass Seed Crop Nutrient Management Publication

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A new publicPicture1ation on nutrient management in perennial ryegrass seed crops has just been released by OSU’s grass seed production research and extension team.  The publication (EM 9086) is a product of many years of  field work in grass seed crops by the members of the research and extension team.  The nutrient management guide covers the impacts of application of nutrients on seed yield, seed yield components, crop growth and development, plant growth regulator use, pests, and others.  Extensive use of tables, figures, and appendices supplement this comprehensive work on perennial ryegrass nutrient management.

The publication can be accessed at the link below:

Perennial Ryegrass Grown for Seed (Western Oregon) EM 9086

Yield mapping in perennial ryegrass seed crops

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Crop fields are generally not uniform and the harvested yield can vary across the field.  Perennial ryegrass seed production fields are also not very uniform but some farmers use yield monitors on their combines to estimate seed yield and the spatial variability in seed yield across their fields.

This variability can be mapped for the fields where yield monitors are used and these maps can serve as the basis for making crop management decisions.  But the reliability of these yield monitor-based estimates was not known for perennial ryegrass seed crops.

A recent paper by co-authored by extension agronomist in seed production Bill Young and others at OSU finds that there is considerable variability in seed yield in an otherwise uniform perennial ryegrass seed field and that a yield monitor can reliably capture this variability in seed yield.

Click on the link below to go to the article:

Reliability of Yield Mapping System for Estimating Perennial Ryegrass Seed Yield