STEEP: Impact of long-term conservation farming research and education in Pacific Northwest wheatlands

Erosion took a serious toll of prime topsoil from wheat fields in the Pacific Northwest United States since farming began in the 1870s. By the mid-1900s, it had become a serious environmental and economic threat to the region that produces world-record rain-fed grain yields and almost 13% of the US wheat crop. Of significance is that 80% of the nation's specialty soft white wheat is grown here for food grain, of which 90% is exported. To combat the severe erosion, wheat growers, the experiment stations, and the USDA in Idaho, Oregon, and Washington joined forces in 1975 to develop a multidisciplinary program named Solutions to Environmental and Economic Problems (STEEP). For more than 30 years, it has proved itself I national landmark in effective conservation farming research and education. The basic strategy was a systems approach that addressed all facets of farming from planting to harvesting in multi-year rotations. Its primary goal was to reduce soil erosion from the region's 3.3 x 10(6) ha (8.2 x 10(6) ac), consisting of highly productive but considerably steep cropland. Through the successful development and implementation of improved conservation technology and farming systems by the tri-state STEEP effort, regional soil loss rates averaging 45 Mg ha(-1) y(-1) (20 tn ac(-1) yr(-1)) were reduced over the 30 years to a tolerable 11 Mg ha(-1) y(-1) (5 tn ac(-1) yr(-1)) or less. In addition, financial returns to wheat growers using the conservation systems are equal or have increased, and long-term benefits to soil, water, and air quality have improved. A conservative estimate shows that the investment cost of saving soil and improving water quality was less than $0.50 ha(-1) y(-1) ($0.20 ac(-1) yr(-1)) over the life of STEEP Though STEEP can boast success, much more is needed to preserve and protect the Northwest environment, natural resources, and productivity to ensure that agriculture is fully sustainable for the future. Ongoing solutions are needed to resolve emerging issues relating to greenhouse gas emissions, carbon storage, energy costs, and other farm inputs that can affect agricultural health. Its proven success provides strong assurance that STEEP can deal with future challenges relating to changes in farm policy, economics, technology, and sociological issues. This paper documents the extent that program goals were achieved and qualitative estimates of return from money invested.