Fertilization Strategies: Grazing Systems

Any successful fertilization strategy emphasizes nutrient management, timing, and product selection, focusing on essential nutrients: Nitrogen (N) for growth, Phosphorus (P) for root development, and Potassium (K) for stress tolerance.

Pasture & Hay

Nitrogen plays a crucial role in enhancing grass yield and protein content, thereby improving plant vigor and reducing weed invasion. Economically applied nitrogen has the potential to double forage production, provided there is adequate soil moisture. The recommended nitrogen rates vary based on pasture type and moisture levels, with a notable correlation where 1 pound of nitrogen can result in a 1-pound increase in calf gain (University of Nebraska-Lincoln Extension, 2009). For optimal results, nitrogen should be applied in spring for cool season grasses, while warm season grasses benefit from a late May application.

Phosphorus is another essential nutrient, particularly in pastures. It is often used alongside nitrogen to achieve higher yields. The application rates of phosphorus are determined by soil test values, with higher recommendations for pastures that include legumes. Phosphate can be applied either in spring or fall, depending on the specific nutrient needs.

While potassium is generally not required due to high natural soil levels, recommendations are available for irrigated pastures, especially those with grass-legume mixes. Sulfur may be necessary for sandy, low organic matter sites, particularly those with a significant legume presence, with 30-40 pounds recommended annually or 100 pounds before seeding, followed by applications every three years.

These strategies are backed by studies on nitrogen fertilization and guides on Nebraska pasture management. "Nitrogen Fertilization of Nebraska Pastures" (2009).

For more information on fertilizer application timing, reference our Grass Maintenance Calendar

Learn how to optimize your grazing using a rotational grazing system.

Last updated 03/13/2026