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Get Actionable Results from a Soil, Plant or Environmental Testing Lab

Learn how to work with an analytical laboratory to get useful results from your plant tissue, soil or water samples.

Shannon Cappellazzi, Clare Sullivan, Gordon B. Jones, Linda Brewer | May 2024 | Extension Catalog publication Peer reviewed (Orange level)

Should I worry about heavy metals in my garden soil?

What do we know about heavy metals in soil? What do we know about lead exposure through soil and garden plants? What do we know about cadmium and arsenic in soils? What can I do if I’m at risk for heavy metals in my garden soil?

Jul 2016 | Article

Living on the Land - Understanding and Measuring Soil pH

The acidity or alkalinity of the soil in which crops grow can influence how well they grow. We measure this characteristic with a pH scale. Each crop has its own ideal pH range. If you want to grow healthy plants, it's...

Garrett Duyck, Elli Korthuis, Susan Kerr, Hannah Brause, Shilah Olson, Ellen Hammond | Jan 2021 | Podcast episode Peer reviewed (Gray level)

Living on the Land - Correcting and Managing Soil pH

The acidity or alkalinity of the soil in which crops grow can influence how well they grow. We measure this characteristic with a pH scale. Each crop has its own ideal pH range. If you want to grow healthy plants, it's...

Garrett Duyck, Elli Korthuis, Susan Kerr, Hannah Brause, Shilah Olson, Ellen Hammond | Jan 2021 | Podcast episode Peer reviewed (Gray level)

Acidifying Soil for Crop Production West of the Cascade Mountains (Western Oregon and Washington)

Explains the relationship between high soil pH and nutrient deficiencies in blueberries, rhododendrons, azaleas, and other ornamental crops. Color photos illustrate symptoms of pH-induced nutrient deficiency. Presents ...

Donald A. Horneck, John M. Hart, Robert G. Stevens, Steven Petrie, James Altland | Feb 2004 | Extension Catalog publication Peer reviewed (Orange level)

Evaluating Soil Nutrients and pH by Depth in Situations of Limited or No Tillage in Western Oregon

Many nutrients and lime are not mobile in the soil. When applied to the soil surface without tillage, these materials remain in the top 2 inches, especially in production systems that lack tillage. If a soil ...

Nicole Anderson, John M. Hart, Donald A. Horneck, Dan M. Sullivan, Neil W. Christensen, Gene Pirelli | Oct 2010 | Extension Catalog publication Peer reviewed (Orange level)

Postharvest Soil Nitrate Testing for Manured Grass and Silage Corn (West of the Cascades)

This publication describes the use of postharvest soil nitrate testing as a tool for assessment of nitrogen (N) management in manured cropping systems west of the Cascade Mountains in Oregon, Washington, and south coastal British Columbia.

Dan M. Sullivan, Craig G. Cogger, Andy I. Bary, Shabtai Bittman, Linda Brewer | Mar 2023 | Extension Catalog publication Peer reviewed (Orange level)

Sheet mulching — aka lasagna composting — builds soil, saves time

Sheet composting, also referred to as lasagna composting or sheet mulching, is a cold composting method used by people around the world for generations. It is an excellent way to convert grass to vegetable beds, create new ...

Jan 2013 | Article

Acidifying Soil for Blueberries and Ornamental Plants in the Yard and Garden: West of the Cascade Mountain Range in Oregon and Washington

This publication explains the importance of soil acidity to plant growth and discusses how to modify it to ensure that rhododendrons, blueberries, and other acid-loving plants thrive in your garden.

John M. Hart, Donald A. Horneck, Robert G. Stevens, Neil Bell, Craig G. Cogger | Apr 2003 | Extension Catalog publication Peer reviewed (Orange level)

Reducing Lead Hazard in Gardens and Play Areas

This publication is designed to help homeowners evaluate and manage lead hazard in their landscape or garden. It explains how soils get contaminated with lead, how to test soil for lead contamination and how to reduce exposure to soil lead.

Linda Brewer, Dan M. Sullivan, Pukhraj Deol, Sam Angima | Oct 2016 | Extension Catalog publication Peer reviewed (Orange level)