Soil acidity, expressed by low soil pH, causes reduced crop growth and significant economic loss. It is the most commonly overlooked and poorly understood yield-limiting factor in western Oregon and a developing concern in eastern Oregon. This publication describes the concept of soil acidity and the limitations it causes for crop production.
Dan Sullivan, Andy Hulting, Nicole Anderson |
Jul 2013 |
OSU Extension Catalog
Laboratory soil tests help you develop your soil and increase crop production by providing information on available nutrient content. Soil testing helps you select the correct kind and amount of fertilizer and liming material. Learn why, when, and where to collect your soil sample, and get straightforward instructions for how to take the soil sample and choose a lab to perform the analysis.
Melissa Fery, Jeff Choate |
Oct 2018 |
OSU Extension Catalog
This publication provides direction on estimating soil moisture by the "feel and appearance" method; taking a some soil and rolling it up in a ball then squeezing it between your thumb and forefinger to form a ribbon and noting how it appears and feels. Compare what you see with photographs and/or charts to estimate percent water available and the inches depleted below field capacity.
This fact sheet describes recent discrepancies between SMP and Sikora buffer pH lime requirement tests for western Oregon soils and provides recommendations for what to do. Many soil testing labs in the U.S. are switching from the SMP to the Sikora buffer test for lime requirement in an effort to reduce the use of carcinogenic chemicals in the procedure. Wide-scale testing ...
This fact sheet is designed to help guide commercial hop growers in selecting cover crops. The guide discusses benefits and considerations or cons for four different cover crop strategies: annual fall planted, annual spring planted, annual re-seeding and perennial sod. Cover crop suggestions are tailored to western Oregon climate and regional cropping practices.
Scientists have developed a new approach to modeling potentially drought-prone soils in Pacific Northwest forests, which could aid natural resource managers to prepare forested landscapes for a changing climate.
A microscopic parasitic roundworm is costing Pacific Northwest wheat growers $51 million in lost revenue each year because it's cutting grain yields by an average of about 5 percent, according to estimates by Oregon State University researchers.
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