Search OSU Extension

Showing 1 - 10 of 89 results.

Alfalfa soil fertility and fertilization requirements

A productive alfalfa crop removes significant quantities of macronutrients and small amounts of micronutrients from the soil. A complete fertilizer program is essential to ensure a highly productive, long-lived stand.

David Hannaway, Mylen Bohle, Daniel Miles, Yitian Lin, Brianna Randow | Sep 2019 | Article

Can Kincaid's Lupine improve my soil?

Q: I'm an urban rental dweller in West Portland, and the soil in my yard appears to be of very poor quality and I can't afford to purchase fertilizer to improve it. My yeard is full of dandelions and weeds currently. After...

A: View answer | View all featured questions

Eyespot of Wheat: How to identify and control this common fungal disease

Eyespot is a fungal disease that causes losses of up to 50 percent in winter wheat fields. The disease is also called strawbreaker foot rot. Learn the steps you can take to keep eyespot of wheat from infecting fields, and to limit its spread.

Christina Hagerty, Duncan Kroese, Christopher C. Mundt, Adam F. Heesacker, Robert S. Zemetra | Mar 2019 | Extension Catalog publication Peer reviewed (Orange level)

General care for hydrangeas

Look to this hydrangea how-to for advice on soil, water, pruning and more. Learn a simple pH trick that will turn blooms from pink to blue.

Kristin VanHoose | Jun 2018 | Article

Wheat virus is bigger problem in Pacific Northwest than previously thought

Wheat soil-borne mosaic disease was first detected in the Walla Walla Valley along the Oregon and Washington border in 2008.

Chris Branam | Mar 2, 2020 | News story

OSU researchers propose CRISPR as influencer of low genetic diversity in deadly bacteria

Scientists at Oregon State University have shed light on the evolutionary history of a soil-borne bacteria that is so dangerous to grazing animals it is kept behind lock-and-key to prevent its spread.

Chris Branam | Oct 18, 2018 | News story

Selecting Native Plants for Home Landscapes in Central Oregon

If planted in a suitable habitat, native plants are well adapted to Central Oregon soils and climate. When grown in the right conditions, native plants experience less environmental, insect, and disease damage than nonnative plants.

Amy Jo Detweiler | May 2008 | Extension Catalog publication Peer reviewed (Orange level)

Fertilizing Shade and Ornamental Trees

Describes how to identify signs of nutrient deficiency in shade and ornamental trees. Discusses the most common soil nutrient deficiencies, types of fertilizer, and fertilization techniques. Offers a simple method, ...

Ann Marie VanDerZanden | Dec 2018 | Extension Catalog publication Peer reviewed (Orange level)

Hemp seedling diseases and their management in the Pacific Northwest

Hemp plants are susceptible to disease, especially at the early stages of development. Hemp growers can promote healthy plants by using high-quality seed and avoiding soil that is wet, dense or poorly drained.

Cynthia M. Ocamb | Jun 2022 | Article Peer reviewed (Gray level)

Field Guide for Diagnosing Common Wheat Maladies of the Pacific Northwest

This field guide provides an overview of basic plant pathology concepts that are relevant to disease identification in wheat. It introduces tools to help distinguish between biotic and abiotic injuries, and discusses...

Christina Hagerty, Richard Smiley | Sep 2017 | Extension Catalog publication Peer reviewed (Orange level)