Over 20,000,000 acres of farmland in the Pacific Northwest is routinely fertilized with nitrogen and/or phosphorus fertilizers. The use of commercial fertilizers allow farmers in teh Pacific Northwest to produce large quantities of grains, fruits, and vegetables which significantly contributes to the region's economy. This food feeds people in the region, throughout the USA, and in many countries across the globe. Fertilizers make this all possible; however, they must be used in a knowlegeable way to prevent undesirable environmental side effects such as the contamination of surface and ground waters in the region.
The land grant institutions in the region (Oregon State University, University of Alaska, University of Idaho, Washington State University) have invested a significant amount of money conducting research over the last 60 years in developing fertilizer rate guidelines for major crops grown in the region. These research-based guidelines, known as fertilizer guides, suggest nitrogen and phosphorus fertilizer application rates based on soil testing information and good science. These guidelines, if followed, will result in maximum economic yields when coupled with good agronomic management practices. In the last 12 months several of the fertilizer guides for dryland crops in the region have been revised to make recommendations more uniform across state lines and to emphasize management practices that result in both maximum economic yields and the protection of surface and ground water quality.
It is important that fertilizer recommendations for nitrogen and phosphorus be updated on a regular basis because of the current emphasis on the protection of water resources in our region. The federal EQUIP (Environmental QUality Incentives Program) and CSP (Conservation Security Program) programs requires the use of sound nutrient management strategies which can be documented through record keeping by landowners. The land grant university generated fertilizer guidelines serve as the source for sound nutrient management and the protection of water quality.
In August, 2004 representatives from the fertilizer industry, the Natural Resources Conservation Service (USDA-NRCS), and the land grant universities met in Moscow, Idaho to discuss current fertilizer guidelines for dryland crops grown in the region. As a consequence of this meeting scientists from the land grant institutions agreed to revise existing guidelines for dryland crops so that recommendations would become more uniform across state lines and to emphasize the importance of water quality protection when providing guidance on the timing and application method of nitrogen fertilizers in the guides.
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