David Hannaway

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Forage Specialist

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541-737-5863
[email protected]

Expertise: Pasture and forages

Department/Unit: Crop and Soil Science - Crops Unit

Content by David Hannaway

Oregon hay producers benefit from OSU research and Extension

OSU has always worked to extend hay research results and best practices to producers through field days, farm visits and workshops.

Gordon B. Jones, David Hannaway, Shawn Donkin, Sam Angima | Mar 2025 | Impact story

Horse Owner's Guide to Buying Hay

Horse owners must know how to evaluate and buy good-quality hay. Learn about the horse's digestive system and nutrient requirements.

Gordon B. Jones, Scott Duggan, Melissa Fery, David Hannaway | Mar 2024 | OSU Extension Catalog

Birdsfoot trefoil in irrigated pastures

Nitrogen-deficient pastures in the West can benefit from the addition of alternative legumes to complement existing grasses. Birdsfoot trefoil is a highly palatable legume that doesn't cause bloat. Its condensed tannin...

Fara Brummer, Serkan Ates, David Hannaway | Feb 2026 | OSU Extension Catalog

Match Clover (in English)

This section of the OSU Forage Information System lists many clovers for use in pastures, hay crops, and set aside areas for pollinators. It list the clover along with growing conditions and attributes. Clovers are legumes so they fix atmospheric nitrogen using rhizobia bacteria living in nodules found on the roots. The soil pH must be at least 5.5, but some prefer a higher pH of 6 - 6.5. The rhizobia will not fix N if the soil pH is too low. When clover leaves dye or are digested and eliminated by livestock, they release their N to the soils where grasses can take it up and utilize it for their growth. Additionally, the high protein content of clovers is a source of high quality nutrients that persist late into the grazing season for animals to utilize.

David Hannaway | Feb 2021 | Online resource

Introduction to pasture and grazing management in Western Oregon

Farmers and ranchers new to pasture management in the Pacific Northwest can learn the basics of establishing and maintaining a productive pasture for their livestock.

Melissa Fery, David Hannaway, David Chaney, Maud Powell, Garry Stephenson | Feb 2025 | OSU Extension Catalog

Invertebrate pest management for Pacific Northwest pastures

Explore effective strategies to safeguard the ecological and economic benefits of pastures from arthropods and gastropods in the Pacific Northwest.

Amy J. Dreves, Navneet Kaur, Mylen Bohle, David Hannaway, Glenn Fisher, Silvia I. Rondon | Nov 2024 | OSU Extension Catalog

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 ensures a productive, long-lived stand.

David Hannaway, Mylen Bohle, Daniel Miles, Yitian Lin, Brianna Randow | Apr 2026 | OSU Extension Catalog

Alfalfa soil fertility and fertilization requirements

A productive alfalfa crop removes significant quantities of macronutrients and small amounts of micronutrients from the soil. Learn how to implement a complete fertilizer program to improve production.

Mylen Bohle, David Hannaway, Daniel Miles, Yitian Lin, Brianna Randow | Sep 2019 | OSU Extension Catalog

For beef cattle, alfalfa meets needs for protein and energy

Alfalfa is an excellent source of protein and energy for beef cattle, and if fed at 1% of body weight, it will supply almost all needed vitamins and minerals and reduce some animal health problems.

Mylen Bohle, David Hannaway | May 2024 | OSU Extension Catalog

Managing small-acreage horse farms in Western Oregon and Western Washington

These seven steps can make your horse farm safe, efficient and environmentally friendly. Learn about horse grazing habits, pasture rotation, weed control, manure management and well water protection.

Melissa Fery, David Hannaway, Garry Stephenson, Linda Brewer, Scott Duggan | Jun 2024 | OSU Extension Catalog

Cover Crops (in English)

This OSU Forage Information System section defines cover crops, lists species and how to establish them, and more.

David Hannaway | Aug 2019 | Online resource

Forage Information System (in English)

A resource for forage-related topics, including Extension, research, and teaching Forage Information Educational Opportunities Collaboration Match Clover

David Hannaway | Aug 2018 | Online resource

Oregon State University Extension Service

FG 30  |  Revised July 2018, Reviewed 2024
View online: https://extension.oregonstate.edu/catalog/pub/fg30

A fertilizer guide for crimson clover, vetch and field peas in Western Oregon

Ernest Hugh Gardner, Thomas A. Doerge, David Hannaway, Harold W. Youngberg and William S. McGuire
A field of crimson clover
FG 30
Determine the fertilizer and lime needs for crimson clover, vetch and field peas in western Oregon.
Use this guide and soil test results to determine the amounts of fertilizer and lime needed for crimson clover, vetch and field peas in western Oregon.
Use this guide and soil test results to determine the amounts of fertilizer and lime needed for crimson clover, vetch and field peas in western Oregon.
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© 2018 Oregon State University. Extension work is a cooperative program of Oregon State University, the U.S. Department of Agriculture, and Oregon counties. Oregon State University Extension Service offers educational programs, activities, and materials without discrimination on the basis of race, color, national origin, religion, sex, gender identity (including gender expression), sexual orientation, disability, age, marital status, familial/parental status, income derived from a public assistance program, political beliefs, genetic information, veteran’s status, reprisal or retaliation for prior civil rights activity. (Not all prohibited bases apply to all programs.)

Accessibility: This publication will be made available in an accessible alternative format upon request. Please contact [email protected] or 541-737-3311.

Plants causing liver disease and sunlight sensitivity in pastures

Some plants can cause liver disease and sensitivity to sunlight in livestock. Learn to identify these plants in your pasture.

Mylen Bohle, David Hannaway, Andy Hulting, Karin Neff | Apr 2018 | Educational gallery

Plants causing cyanide poisoning in pastures

This group of plants contain compounds called cyanogenic glycosides that can poison pasture animals. Learn how to identify these common plants.

Mylen Bohle, David Hannaway, Andy Hulting, Karin Neff | Apr 2018 | Educational gallery

Managing small-acreage horse farms in Central and Eastern Oregon

Learn best practices for managing horses, pastures and manure on small-acreage farms in Eastern and Central Oregon, promoting environmental stewardship and operational efficiency.

Garry Stephenson, David Hannaway, Mylen Bohle, Linda Brewer, Ellen Hammond, Cory Parsons, Peter Schreder, Melissa Fery, Scott Duggan, Gordon B. Jones | Aug 2025 | OSU Extension Catalog

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