Explains the relationship between high soil pH and nutrient deficiencies in crop plants. Color photos illustrate symptoms of pH-induced nutrient deficiency. Explains the causes of high soil pH and presents step-by-step instructions for lowering pH.
With an annual wheat harvest valued at $2.1 billion, producers in Idaho, Oregon, and Washington know the value of farming practices adapted to each region, county, and field. Researchers mapped precipitation, soil depth, and growing degree day data to divide this important growing region into six geographic zones. These agronomic zones serve as a basis for applying research and management strategies.
Oregon State University Masters student Max Combest explains issues related to Potato Virus Y (PVY). He is doing research of PVY in potato production in the Pacific Northwest and worldwide. He is looking to understand the interactions between potato and PVY. He uses biotechnology tools like CRISPR to study two genes associated with the hypersensitive response of potato to PVY.
This 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).
Many nutrients and lime are not mobile in the soil. When applied to the soil surface without tillage, these materials remain in the top 2 inches, especially in production systems that lack tillage. If a soil sample is taken at a standard 8-inch depth, the top 1 to 2 inches, which have higher nutrient concentrations, will be mixed with the lower 6 to 7 inches, which ...
How do growers know what to grow — what will be profitable for their operation? This publication provides benchmark estimates for farm-level costs and returns for the dryland crops typically produced in the region of eastern Washington, northern Idaho, and northeastern Oregon. Those dryland crops include wheat; spring barley, peas and canola; lentils and chickpeas.
This publication assists western Oregon farmers and agricultural professionals in determining the nitrogen fertilizer replacement value of winter cover crops. Includes information on plant-available nitrogen (PAN) basics; a site-specific, step-by-step method to estimate PAN; Willamette Valley case studies; and appendices summarizing Willamette Valley cover crop research that supports these PAN estimates.
The Agricultural Research and Extension Centers in Eastern and Central Oregon have dedicated faculty focused on IPM (Integrated Pest Managment) for potato and seed potato production. Additional resources are available for Western Oregon gardeners through the Community Horticulture and Small Farms Programs.
Describes the use of postharvest soil nitrate testing as a tool for assessing nitrogen management in manured cropping systems west of the Cascades. The first section gives general information on the test and is designed for use by growers and dairy operators. The focus is on how to use the test to improve nutrient management. The second section is designed primarily for ...
Focuses on how to design a soil nutrient monitoring strategy using management units or zones for soil testing and nutrient application. This approach is designed to provide better information to make nutrient management decisions at a reasonable cost. Using a management unit approach, a grower can vary the amount and type of nutrient applications within a field. Two examples of...