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Christmas Tree Nutrient Management Guide for Western Oregon and Washington

A comprehensive guide to fertilization and nutrient management in Christmas tree fields. Discusses tree nutrient use at various stages in the crop cycle and explains how to use soil and tissue testing to determine fertilizer ...

Brad Withrow-Robinson, Chal Landgren, Michael Bondi | Sep 2009 | OSU Extension Catalog

Nitrogen Fertilizer: Where Does it Go?

Most Christmas tree growers fertilize with nitrogen (N) intending to improve tree color, growth, and ultimately value. Where does the fertilizer go after application? How much is actually taken up by the trees, stored in the ...

Chal Landgren, Michael Bondi, Steve Webster, Rick Fletcher | Jul 1994 | Article

Noble fir seedling survival strategies

Applied research to increase survival of noble fir Christmas tree seedlings during drought years, North Willamette Research and Extension Center.

Judy Kowalski, Chal Landgren | Jan 2020 | Article

Infiltration Testing: Low-impact development fact sheet

One of the first steps in siting a low-impact development facility is infiltration testing. Infiltration tests estimate the rate at which runoff will infiltrate, or pass through, native soil. An infiltration test, in essence, ...

Derek Godwin | Aug 2018 | OSU Extension Catalog

Vegetated Roofs: Low-impact development fact sheet

Growing a garden on your roof is an attractive alternative building method, but there's a lot to know before you start hauling soil to the top floor. Learn how vegetated roofs, also known as "green" roofs, can play an elevated role in the low-impact development landscape.

Derek Godwin | May 2018 | OSU Extension Catalog

Growing Christmas Trees in the Pacific Northwest

A guide for the prospective and novice Christmas tree grower. Includes how to evaluate risk and potential for return. Discusses the tree growing cycle, tasks and time requirements, pertinent laws and regulations, and costs, ...

Chal Landgren, Michael Bondi | Jun 2003 | OSU Extension Catalog

Porous Pavement: Low-impact development fact sheet

Porous pavement allows runoff to move through the surface and into the soil beneath, reducing the volume of stormwater. Learn about porous asphalt, pervious concrete, permeable pavers and flexible paving systems and how each ...

Derek Godwin | Jun 2018 | OSU Extension Catalog

Cultivating

Cultivating Healthy Farms, Forests, Food and Families in Polk County.

Newsletter

OSU environmental chemists tapped to lead studies of contaminants at military bases

Research is funded through nearly $3 million in grants

Chris Branam | Feb 15, 2018 | News Story