Nutrient Management

Pasture Fertilizer Guide for Western Oregon and Washington - A single fertilization program will not fit all pastures. This guide gives an overview of nutrient management for new and existing pastures, including general recommendations for nitrogen, phosphorus, potassium, sulfur, boron and lime applications.

Soil Testing - It is nearly impossible to determine the rate and type of fertilizer that should be applied to pastures and hay fields without first taking a soil sample and having it analyzed. Learn how to take a soil sample, where to have the sample analyzed and how to interpret the results by checking out the Soils page on this OSU Extension Service Small Farms website.

Early Spring Forage Production for Western Oregon Pastures - This publication illustrates that nitrogen applications in the early spring, based on TSUM-200 can effectively increase forage yields.

Selenium Fertilization of Forages - Selenium (Se) is a micronutrient that is not essential for forage growth but is essential to the health of animals that graze the forages. Parent rock material in western Oregon is deficient in Selenium; therefore, our soils lack this micronutrient. Selenium is needed to maintain good health of cattle. Cows fed inadequate amounts of selenium are at higher risk for white muscle disease, retained fetal membranes, reduced immune system response, and mastitis.

Selenium Fertilization to Prevent Selenium DeficiencyParts of Oregon are known to have soils that are deficient in the essential micronutrient selenium, and this causes symptoms of selenium deficiency in livestock grazing or fed crops raised on them. Read science based data from an Oregon study focused on applying selenium fertilizer to pastures to reduce deficiencies in livestock.

Applying Lime to Raise Soil pH for Crop Production (Western Oregon) - This 21 page publication describes how to estimate lime application rate and lists criteria for choosing liming materials (source), lime application method (placement), and how often to apply lime (frequency).

Nutrient Cycling in Pastures - Good pasture management practices favor effective use and recycling of nutrients. Nutrient cycles important in pasture systems are the water, carbon, nitrogen, and phosphorus cycles. This publication provides basic descriptions of these nutrient cycles then provides guidelines for managing pastures to enhance nutrient cycling efficiency for productive forage and livestock growth, soil health, and water quality.

Assessing the Pasture Soil Resource -This technical note provides methods to determine biological activity of pasture soils and practical tips on improving the usefulness of typical soil and plant samples. The soil biology sampling methods are easy to learn, and utilize commonly available tools found around any farm. Once these biological assessments are made, more insight into the many benefits of nutrient cycling become apparent. Methods for using soil and plant samples strategically are also covered.