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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

Variety in the Pasture

Forages are a critical part of farming and ranching, and a large variety of grasses and legumes are available for planting in our fields. The more we know about these forages, the better we can choose what we grow and ...

Shelby Filley | Mar 2012 | Article

Coastal Pastures in Oregon and Washington

The coastal regions of Oregon and Washington have different climate and soils than other parts of the states. Rainfall is high, ranging from 70 inches in southern Oregon to more than 100 inches in the coastal mountains. ...

Fred Lundin | Sep 1996 | Article

Turfgrasses and Lawn Care in Eastern Oregon

Today, turfgrass is the single largest irrigated crop in the United States and covers three times the land area of any other cultivated crop. An estimated 40.5 million acres of grasses are planted in residential, commercial and...

Richard Smiley | Jan 2018 | Article

Dry Farming Oregon

Oregon State University is known for its College of Agricultural Sciences. The school offers 25 Major and Minor options that include but are not limited to Botany, Animal Sciences, and even Fermentation Sciences for you beer ...

Jan 2017 | Article

Scotch Thistle

Scotch thistle was introduced to the United States in the 1800s as an ornamental plant from the Mediterranean region. It is a noxious weed in Idaho, Oregon, and Washington. Scotch thistle can form dense, virtually impenetrable ...

Sep 2003 | OSU Extension Catalog

Russian Thistle: Management in a Wheat-Fallow Crop Rotation

Reviews Russian thistle biology as it relates to management, including seed dormancy and longevity in soil, seed distribution, seed germination and emergence, plant growth after establishment, crop competition, and resistance to ...

Aug 2019 | OSU Extension Catalog

Integrated Management of Mayweed Chamomile in Wheat and Pulse Crop Production Systems

In small grain and pulse crops throughout the high rainfall zones of the Inland Pacific Northwest, mayweed chamomile is a troublesome weed. Individual plants can produce as many as 17,000 seeds, and seed remain viable in the ...

Andy Hulting | May 2017 | OSU Extension Catalog

Perennial Weed Biology and Management

Explains how simple and creeping perennial weeds reproduce and spread. Covers weed seedbanks, seed dormancy in soil, and factors that influence seed germination. Describes the typical root structure of perennial weeds and the various...

Mar 2001 | OSU Extension Catalog