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How long do weed seeds survive in the soil?

Weed seeds can survive in the soil for years before they germinate and grow.

Feb 19, 2003 | News Story

Bareroot Shade, Flowering, and Fruit Trees (Willamette Valley) Fertilizer Guide

This guide can serve as a starting point for development of nutrient management guidelines for Oregon growers. Recommendations in this guide are based on research performed in the Willamette Valley with other cropping systems and ...

Dan Sullivan | Oct 2010 | OSU Extension Catalog

Methods to control blackberry thickets

It could take years to eradicate a large patch of blackberries, because so many seeds remain in the soil. But with good timing and dedication, property owners can reduce a sprawling blackberry thicket to a few manageable stragglers

Mar 26, 2010 | News Story

Management Strategies for Dealing with Select Poisonous Plants in Oregon

Rangeland, pastures and hay fields throughout Oregon often contain poisonous plants that are potentially dangerous to cattle and other livestock.

Andy Hulting, Karin Neff | Sep 2019 | Publication

Growing Tree Fruits Successfully

Selecting and preparing the site and soil, irrigation, rootstocks and varieties, planting, pruning and thinning fruit, pest management, and maintenance schedule.

Jun 2018 | Presentation

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 Document

Apple Resources for Umatilla County

Umatilla County is the apple capital of Oregon and produces ~2200 acres of apples.

Jul 2018 | Collection

Yesterday's Orchard, Today's Home: Legacy Pesticides on Former Orchards

Residues of lead arsenate, DDT, and other persistent pesticides may be in soil where orchards once grew and homes now stand. This report discusses how to investigate former pesticide use and current pesticide residues on your ...

Dave Stone, Kim Anderson | Mar 2009 | OSU Extension Catalog

Growing Hazelnuts in the Pacific Northwest: Orchard Site Selection

This publication describes factors to consider when deciding to plant a hazelnut orchard and includes a table of native productivity ratings for soil series types in the Willamette Valley.

Nov 2013 | OSU Extension Catalog

What should I be doing now for weed control?

Q: The straw mulch I used at the end of summer to suppress the weeds doesn't seem to be working. Should I till it and cover with plastic? black or clear? Is there something better. Or should I add more straw. I could probably bring some cardboard home from work. Is this a healthy option?

A: View answer | View all featured questions