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Nutrient management

OSU organic fertilizer & cover crop calculator: Predicting plant-available nitrogen

Describes the OSU Organic Fertilizer & Cover Crop Calculator and using it to predict plant-available nitrogen.

Dan M. Sullivan, Nick Andrews, Clare Sullivan, Linda Brewer | Mar 2023 | OSU Extension Catalog

Camelina Nutrient Management Guide for the Pacific Northwest

Camelina is a drought-tolerant, low-input, oilseed crop grown throughout the U.S. Pacific Northwest. This publication provides soil fertility recommendations—including nitrogen, phosphorus, potassium, sulfur, and soil pH ...

Amber Moore, Don Wysocki, Thomas G. Chastain, Tracy Wilson, Alyssa DuVal | Feb 2023 | OSU Extension Catalog

Nutrient Management for Pastures: Western Oregon and Western Washington

Describes nutrient management practices for pastures to produce forage as a main feed source for western Oregon and Washington livestock.

Amber Moore, Gene Pirelli, Shelby Filley, Steve Fransen, Dan M. Sullivan, Melissa Fery, Tom Thomson | Jan 2023 | OSU Extension Catalog

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Soil organic matter as a soil health indicator

Testing for soil organic matter helps you monitor soil health over time. Good soil management practices can improve soil organic matter in three to five years. Learn about sampling, testing and how to interpret results for your soil.

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Photo Credit: Bits and Splits - Adobe Stock (Cropped from original)

Soil erosion and conservation

Selecting successful cover crops for your hop yard

This fact sheet is designed to help guide commercial hop growers in selecting cover crops. The guide discusses pros and cons for four different cover crop strategies: annual fall-planted, annual spring-planted, annual re-seeding and...

Betsy Verhoeven | Apr 2024 | OSU Extension Catalog

More soil erosion and conservation resources

Soil sampling and testing

Soil Nitrate Testing for Willamette Valley Vegetable Production

A soil nitrate test measures the concentration of nitrate in the soil at a specific moment in time, including nitrate originating from organic inputs, fertilizer, and soil organic matter. This publication describes ...

Dan M. Sullivan, Nick Andrews, Aaron Heinrich, Ed Peachey, Linda Brewer | Aug 2023 | OSU Extension Catalog

Learn more on soil testing

Soil health

Nutrient and Soil Health Management for Sweet Corn (Western Oregon)

This guide integrates recommendations for nutrient management with cover cropping practices that promote soil health. Recommendations for nutrient rate, source, timing and placement for nitrogen, phosphorus, potassium, ...

Dan M. Sullivan, Ed Peachey, Aaron Heinrich, Linda Brewer | Jun 2023 | OSU Extension Catalog

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Latest Content

Nutrient management of raspberries and blackberries in Oregon and Washington

Learn what kinds of nutrients raspberries and blackberries need in the Pacific Northwest and how to provide them.

Amanda Davis, Scott Lukas, Bernadine Strik, Amber Moore, Lisa Wasko DeVetter, David Bryla, Emily Dixon | Nov 2024 | OSU Extension Catalog

Soil testing resources

Learn what you need to know to test your farm or garden soil.

Jun 2024 | Collection

Soil Testing Lab Selection and Recommended Analytical Methods for Oregon

Not all soil tests are the same. Here's how to choose a soil testing lab in Oregon.

Gordon B. Jones, Amber Moore, Eliza Smith | May 2024 | OSU Extension Catalog

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Latest stories

OSU builds home for organic agriculture research and outreach

OSU Extension partnered with Oregon Tilth and the Oregon Organic Coalition to develop the organic program, which is housed in the Center for Resilient Agriculture and Food Systems in the College of Agricultural Sciences.

Chris Branam | Apr 10, 2025 | News story

Engineering students help Extension faculty improve cover crop technology

Four OSU engineering students teamed up with Nick Andrews, the Oregon State Extension organic vegetable specialist, to design and build more a effective interseeding tractor.

Henry Carnell | Aug 20, 2024 | News story

OSU Extension soil fertility study saves grower costs of applying gypsum to hemp crop

The study showed that the crop performed equally well with and without gypsum and nutritional samples of the hemp flowers did not indicate any problems by discontinuing applications.

Gordon B. Jones | Mar 2023 | Impact story

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Garden soil and compost

Sustainability

Water management and conservation

Upcoming Events

May 20

Soil Test Interpretation for Small Farms

4:30 pm - 7:30 pm Lincoln City, OR

Jun 4

Organic Winter Cereals and Cover Crops Field Day

2:00 pm - 6:00 pm Corvallis, OR

Jun 27

Tree School East 2025

8:00 am - 5:00 pm Baker City, OR

Meet Our Experts

Nicole Anderson

Associate Professor

Nick Andrews

Organic Vegetable Extension

Logan Bennett

Small Farms and Master Gardener Program Coordinator

Contact for Farming and Gardening Questions in Douglas County

Linda Brewer

Senior Faculty Research Assistant II, Department of Horticulture

Contact me for questions about soils, soil test interpretation, composting, vermicomposting.

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Testing strips for soil acidity?

P: I'm working on getting my blueberry patch acidified properly, and I've noticed that the pH keeps drifting upwards (I suspect the buffered municipal water I irrigate with is the cause). At any rate, I'm looking for ...

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