David Hannaway

Forage Specialist

541-737-5863
[email protected]

Expertise: Pasture and forages

Department/Unit: Crop and Soil Science - Crops Unit

Content by David Hannaway

Birdsfoot Trefoil in Irrigated Pastures: Northern Great Basin Pasture Systems Can Benefit From Legume Interseeding

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 | Apr 2021 | Extension Catalog publication Peer reviewed (Orange level)

Match Clover

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 | Dec 2020 | Extension Catalog publication Peer reviewed (Orange level)

Invertebrate Pest Management for Pacific Northwest Pastures

A well-managed pasture has several ecological and economic benefits. However, several species of arthropods (insects, mites and garden symphylans), and gastropods (slugs) inhabit pastures of the Pacific Northwest of the United States and can diminish those benefits.

Amy J. Dreves, Navneet Kaur, Mylen Bohle, David Hannaway, Glenn Fisher, Silvia I. Rondon | Aug 2020 | Extension Catalog publication Peer reviewed (Orange level)

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

Managing Small-Acreage Horse Farms in Western Oregon and Western Washington

Horses, grass, manure, soil and water are all interconnected. How you manage one affects the others. Following these seven steps can make your horse farm safe, efficient, and environmentally friendly. Learn more ...

Melissa Fery, David Hannaway, Garry Stephenson, Linda Brewer, Scott Duggan | Sep 2019 | Extension Catalog publication Peer reviewed (Orange level)

Cover Crops

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

David Hannaway | Aug 2019 | Online resource

Managing Dairy Grazing for More Milk and Profit

This publication covers how pasture grows, understanding grazing systems, and forage quality. It also covers advanced tools for managing high-intensity grazing systems, such as the feed wedge (also called pasture wedge or grazing wedge).

Troy Downing, David Hannaway, Brianna Randow, Pete Berry, Xiumei Yang | Nov 2018 | Extension Catalog publication Peer reviewed (Orange level)

Forage Information System

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

David Hannaway | Aug 2018 | Online resource

Red Clover: Western Oregon—West of Cascades Fertilizer Guide

Based on soil test results, recommends amounts of fertilizer and lime needed for red clover in western Oregon.

Ernest Hugh Gardner, Tom L. Jackson, Thomas A. Doerge, David Hannaway, William S. McGuire | Jul 2018 | Extension Catalog publication Peer reviewed (Orange level)

Crimson Clover, Vetch, Field Peas: Western Oregon—West of Cascades Fertilizer Guide

Based on soil test results, recommends amounts of fertilizer and lime needed for crimson clover, vetch, and field peas in western Oregon.

Ernest Hugh Gardner, Thomas A. Doerge, David Hannaway, Harold W. Youngberg, William S. McGuire | Jul 2018 | Extension Catalog publication Peer reviewed (Orange level)

Plants Causing Physical Injury in Pastures

Many plants have characteristic that can cause injury to grazing animals. Some grasses can be palatable when young, but can cause injury to the nose, eyes, mouth and ears of grazing animals when plants mature with long awns.

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

Plants Causing Liver Disease & Sunlight Sensitivity in Pastures

Plants causing liver disease and photosensitization (sensitivity to sunlight) are often grouped together, as photosensitivity is often a secondary symptom of liver disease cause by poisonous plants.

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

Poisonous Plants Commonly Found in Pastures

Pastures often contain weeds that are potentially dangerous to livestock. The toxic compounds in plants are usually a defense mechanism against predation and have a distinct, unpleasant odor or a bitter taste and are not ...

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

Plants Causing Organ Failure in Pastures

This group of plants contain pyrrolizidine alkaloids which are the most common cause of liver damage, but also can cause kidney damage, heart failure, cancer and photosensitization. Animals typically will not readily eat plants with pyrrolizidine alkaloids, unless no other forage is available.

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

Plants Causing Cyanide Poisoning in Pastures

This group of plants contain cyanogenic glycosides that are converted to hydrogen cyanide or prussic acid when the plant cells are damaged. Chronic poisoning over time causes loss of nerve function while acute poisoning causes death.

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

Plants Affecting Cardiovascular Health in Pastures

Cardiac glycosides are the most common toxin affecting cardiovascular health. Generally all parts of the plant are highly toxic and lethal if eaten in small quantities. However, animals typically will not readily eat these unpalatable plants, unless no other forage is available.

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

Plants Causing Irritation in Pastures

Plants in this group contain compounds that may irritate an animal's digestive tract, mouth or skin if consumed. These plants are not generally palatable and are typically avoided.

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

Plants Causing Nitrate & Oxalate Poisoning in Pastures

Some plants absorb excess nitrates or oxalates from the soil and store them in plant tissues. Toxicity problems can occur in animals which feed on these plants.

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

Who's Coming to Dinner?

This video examines the eating habits of cows, sheep, horses, and goats, and explores how forage selection, pugging, trampling, and fencing contribute to a pasture's health and sustainability.

David Hannaway | Sep 2011 | Extension Catalog publication Peer reviewed (Orange level)

Managing Small-Acreage Horse Farms in Central and Eastern Oregon

This publication presents a system for managing horses, pastures, and manure that will make your farm safe, efficient, and environmentally friendly. It is intended for horse farms from 1 to 10 acres in the high dry regions of eastern and central Oregon.

Garry Stephenson, David Hannaway, Mylen Bohle, Linda Brewer, Ellen Hammond, Cory Parsons, Peter Schreder, Melissa Fery | Nov 2007 | Extension Catalog publication Peer reviewed (Orange level)

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