Avoiding Hoeing in Organic Oilseed Rape

This practice describes undersowing oilseed rape with frost-sensitive legumes to suppress weeds, reduce soil erosion, and fix nitrogen, minimizing mechanical weed control. The method enhances soil cover in autumn, promotes nitrogen mineralisation for the main crop, and creates a protective mulch after winter dieback. Benefits include reduced nutrient leaching, lower variable costs, and decreased carbon emissions from reduced tillage. Challenges include potential crop competition, limitations in seeding technology, and possible increases in weed pressure in subsequent crops. Recommended practices include sowing in late August, applying composted manure (15–20 t/ha) and slurry (30–50 m³/ha) in autumn and spring, or using organic fertilisers in February. Sowing can be done simultaneously or in two stages, with precision drilling preferred to avoid uneven distribution. The approach is most effective in moderate climates like Central Europe, where local adaptation is key. It is suitable for oilseed rape cultivation and reduces the need for hoeing, saving time and cost. Required equipment includes a suitable seed drill.