Oat Pea Intercrop Demonstration: Final Report for Agricultural Demonstration of Practices and Technologies (ADOPT) Program
An oat-pea intercrop may be planted as a grain crop and local evaluation of seeding rates is needed to asses crop value, agronomic characteristics, and flexibility for end use. A combination of pea and oat may have higher LER and crop value than either monocrop on their own. Also, grain intercrops may improve agronomic characteristics of pea by reducing or mitigating lodging, disease, and insect damage. This project investigated the effect of varying the oat seeding rate as a companion crop with pea to determine whether there is a consistent optimum balance of the two crops.
This project will look at how to grow oat and pea together as a grain crop, how to separate grain components using slotted screens, and the effect of varying oat seeding rates in intercrop with pea on yield and agronomic parameters.Peas and oats are both relatively low value crops in the rotation compared withcanola. They are both beneficial to have in a crop rotation in terms of nitrogen useefficiency and mycorrhizal associations. Intercropping oats and pea in a mixed graincrop may result in a more resilient and valuable product with reduced need forherbicides and nitrogen fertilizer. Oat may have beneficial effects on pea disease orreduce weed pressure, which has implications for herbicide-resistant weeds like kochia. An oat-pea intercrop may be agronomically and economically suitable for many of thecrop zones found in Saskatchewan. An intercrop may reduce the need for glyphosate applications by reducing weed competition and may also improve soil aggregate stability. This project is funded by the ADOPT program.