Austrian Field Pea - Cover Crop SeedsNon gmo, annual. Cover Crop. Austrian Field Peas as a Field cover crop: A low growing, viny legume which has been shown to fix over 200 pounds of nitrogen per acre per year under good conditions. Austrian Field Pea seeds are usually sown as a farm and garden cover crop in the fall. In the inter mountain states it over winters well in most valley locations but can winter kill during long periods of sub zero temperature with no snow cover. Austrian