This project in the Yakima Valley includes nearly 20 farmers who are using biosolids to enhance soil fertility and to improve tilth and moisture retention.

More than 35,000 acres of irrigated hops, canola, corn, orchards, grain and rangeland are available.

Farm Philosophy
Holistic farm management practices should be used to promote crop production and maintain harmony with nature. Biosolids recycling supports this approach.

Project History
The Green Valley Project began in 1987 when the farm used biosolids from the City of Everett to amend soils on several fields. In 1991, the farm began working with King County to recycle biosolids. Since then, Natural Selection Farms expanded the project to include biosolids from other cities such as Sunnyside and Yakima, and began composting biosolids and other farm residuals. Natural Selection Farms is now permitted by the Department of Ecology as a Beneficial Use Facility for biosolids.

Environmental Stewardship
The farm has demonstrated leadership in its local community by championing environmental stewardship, addressing soil quality issues and reducing the use of commercial fertilizers and pesticides. Organic biosolids can meet the crop nutrient needs without damaging the environment. In 2004, the farm began growing canola and has since begun pressing seeds to make oil for conversion to biodiesel.

Environmental Monitoring
Environmental monitoring has been conducted on many local area wells, irrigation ditches and the Yakima River. Soil nutrient and metals levels have also been tracked during this time. Benefits from using biosolids have been observed, including the return of earthworms, increased productivity of formerly alkaline soils, more vigorous plant growth, improved moisture retention and subsequent reduction in irrigation requirements.