Troy Downing

Retired

Content
Publications
Awards

Content by Troy Downing

Silage Corn Nutrient Management Guide for Western Oregon

Silage corn is an excellent feed for dairy cattle because of its high dry-matter yield, energy content and palatability. This guide provides nutrient and lime recommendations for silage corn established after ...

Dan M. Sullivan, Troy Downing, Linda Brewer, John M. Hart | Mar 2023 | Extension Catalog publication Peer reviewed (Orange level)

A Horse Owner's Guide to Pasture-associated Laminitis

The key to preventing laminitis in your horses is to regulate their time grazing on grass high in nonstructural carbohydrates. Inadequate exercise is another cause of this painful hoof condition.

Scott Duggan, Troy Downing | Jun 2022 | Extension Catalog publication Peer reviewed (Orange level)

What Are Your Forages Worth?

Designed to help dairy farmers calculate the costs of homegrown forages and compare them to the costs of purchasing forages. Presents typical per-acre costs of establishing, producing, and harvesting alfalfa or grass...

Troy Downing, Ann-Marie Chamberlin, Michael Gamroth, Amy Peters | May 2021 | Extension Catalog publication Peer reviewed (Orange level)

Tasas de Aplicación de Estiércol para la Producción de Forraje en el Oeste de Oregón (Manure Application Rates for Forage Production)

Esta publicación proporciona estimaciones de la eliminación de nitrógeno, fósforo y potasio de cultivos forrajeros que se cultivan en lecherías en el oeste de Oregon. También proporciona orientación sobre las ...

Troy Downing, Dan M. Sullivan | Mar 2021 | Extension Catalog publication Peer reviewed (Orange level)

Manure Application Rates for Forage Production

This publication provides estimates of crop removal of nitrogen, phosphorus and potassium for forage crops grown on dairies in western Oregon. It also provides guidance on liquid manure application rates to meet crop nitrogen requirements.

Troy Downing, Dan M. Sullivan | Nov 2020 | Extension Catalog publication Peer reviewed (Orange level)

Calculating Dairy Manure Nutrient Application Rates

This publication describes how to calibrate waste-handling equipment and calculate nutrient application rates. It covers calibration of typical equipment found on dairies, such as stationary guns, traveling guns, liquid ...

Troy Downing, Maydra Valencia | Apr 2019 | Extension Catalog publication Peer reviewed (Orange level)

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)

Assessing Phosphorus and Potassium Feeding on Oregon Dairies

A study was conducted on Oregon dairy farms in 2002-2003 investigating the quantity of phosphorus and potassium in cow diets and in the produced urine and feces.

Troy Downing, Amy Peters, Patrick French, Kathryn Higgs, Mary French | Sep 2016 | Online resource

The Veterinary Feed Directive: Questions and Answers for Oregon Livestock Producers

As of January 2017, Oregon livestock producers must comply with a new federal law that fundamentally changes the way feed-grade antibiotics are used in their operations: The Veterinary Feed Directive. This publication...

Sergio Arispe, Charles Estill, Troy Downing | Sep 2016 | Extension Catalog publication Peer reviewed (Orange level)

Owning a Dairy Cow or Goat

People who live in the suburbs and own a small acreage often choose dairy cattle or dairy goats as a way to harvest and use their forage. Milk production can reduce the family grocery bill. Goats, ...

Troy Downing, Lisbeth Goddik | Sep 2010 | Extension Catalog publication Peer reviewed (Orange level)

Ammonia Control Best Management Practices

This publication provides and evaluates best management practices for the control of ammonia lost to the air on dairy farms.

Troy Downing, Michael Gamroth | Aug 2009 | Extension Catalog publication Peer reviewed (Orange level)

Soil pH and pasture productivity on the Oregon Coast

Producers have questioned the conventional advice to apply lime to change the pH of coastal soils. We look at one set of data on ryegrass pastures that shows the return on investment may indeed be modest.

Troy Downing | May 2009 | Article

Improved Understanding of Fiber Digestibility in Ryegrasses

Dairy nutritionists have long known that forages with the same laboratory analysis could produce significantly different performance in lactating cows. Neutral detergent fiber digestibility (NDFD) may explain much of this variation. The objectives of the study described here were to demonstrate NDFD variation between varieties of ryegrass and season of harvest and to use this information as the basis for an educational Extension program.

Troy Downing, Patrick French | Apr 2009 | Online resource

OSU Extension Service