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Washington State University Extension

Irrigated Agriculture

high residue farming

High Residue Farming under Irrigation Publications

Posted December 17, 2014

EM071 High Residue Farming Under Irrigation: What and Why provides an overview of high residue farming (HRF), including its benefits and challenges. It also discusses some special considerations for high residue farming in the irrigated agriculture regions of the far western United States.

EM072 High Residue Farming Under Irrigation: Crop Rotation covers choosing a cropping sequence, specific cover crops, and special considerations for irrigated cropping systems in the far western United States.

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Concentrate Organic Matter at Surface to Improve Soils

Posted April 15, 2014

Researchers are finding, in the US and in many other countries, that concentrating soil organic matter in the top 2″ promotes several aspects of soil health including nutrient cycling, resistance to erosion, and water infiltration and storage. They find that maintaining a high proportion of organic matter at the soil surface, relative to deeper layers, is more important than the total level of organic matter in a soil. Read more »

Consider Surface Banding Your Starter Fertilizer

Posted March 17, 2014

Starter fertilizer is necessary for high corn yields at our Northern latitude, and especially with high residue farming systems. A common way to apply dry starter fertilizers has been the 2×2 method, two inches off the row and two inches below the seed. However, recent research has found that surface banding of liquid fertilizer, 2″ off the row, can be just as effective. Surface banding eliminates the need for an extra set of openers, allows greater residue levels and reduces required planter weight. It also allows greater fertilizer rates than popup methods (with the seed).

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Best Bets for High Residue Farming in the Irrigated Columbia Basin

Posted March 14, 2014

When considering the risk of using high residue farming in the Columbia Basin, there are some crops that are high risk and some that are lower risk.

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Cold Springs Reduce Strip-tilled Corn Yields

Posted March 14, 2014

I have talked to several growers who are concerned about how cold springs have reduced their strip-tilled corn yields when compared to corn with full width clean tillage. While we can hope for average spring temperatures, there are a few other things that should be considered.

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