næringsstofstyring

Næringsstoffstyring, or nutrient management, is the planning, monitoring, and control of nutrient flows in agricultural and land-use systems to meet crop requirements while protecting soil health and environmental quality. It covers essential macronutrients such as nitrogen, phosphorus and potassium, as well as micronutrients, and applies to arable farming, horticulture, and livestock operations.

The main objectives are to optimize crop yields and quality, maximize nutrient use efficiency, reduce losses to air, water and groundwater, comply with environmental regulations, and maintain long-term soil fertility. Effective styring seeks to balance nutrient supply with crop demand over short and long time horizons.

Core elements include soil testing and interpretation, nutrient budgeting that accounts for inputs (fertilizers, manure, organic amendments) and outputs (crop uptake, losses), and the development of nutrient management plans. It also involves deciding the timing, rate, and method of fertilizer and manure application, placement and incorporation practices, and the use of cover crops and rotations to improve nutrient cycling.

Methods and tools commonly employed include decision-support guidelines, precision agriculture techniques, weather and soil data integration, and risk assessment for losses through volatilization, leaching, or runoff. Documentation and regular re-evaluation of plans are key to adapt to changing conditions and regulations.

Contextual factors include regulatory frameworks such as nitrate directives and environmental protection policies, as well as sustainability goals, which drive practices to reduce eutrophication and emissions. Næringsstoffstyring is relevant across farm sizes and disciplines, and is supported by extension services, research, and certification programs to improve adoption and effectiveness.