Suojaviljelyssä

Suojaviljelyssä is a Finnish term referring to the practice of planting a secondary crop between rows or after the main crop harvest. This practice aims to protect the soil from erosion, improve soil fertility, and suppress weeds. Often, cover crops are sown immediately after the main crop has been harvested in the autumn or during periods when the main crop is not actively growing.

The primary goals of suojaviljelyssä are soil conservation and enhancement. By covering the soil surface, the secondary crop prevents wind and water erosion, especially during periods of bare soil. The roots of the cover crop help to bind the soil particles together, further reducing erosion. Additionally, certain cover crops can fix nitrogen from the atmosphere, enriching the soil with this essential nutrient for future crops. This can reduce the need for synthetic nitrogen fertilizers.

Suojaviljelyssä also plays a role in weed management. A dense cover crop can outcompete weeds for light, water, and nutrients, thus suppressing their growth. This can lead to a reduction in herbicide use. The biomass produced by the cover crop can be incorporated into the soil as organic matter, improving soil structure, water-holding capacity, and overall soil health. Common crops used for suojaviljelyssä include various types of legumes, grasses, and brassicas, chosen based on regional climate, soil type, and the needs of the subsequent main crop. The decision to implement suojaviljelyssä is typically based on agricultural best practices and aims to create a more sustainable and resilient farming system.