CANYON COUNTY, Idaho — Mike Somerville’s horse-hay operation between Caldwell and Marsing, Idaho, is surrounded by farms.
But like many others in the area, he’s concerned about a potential wave of development flooding the area with new houses and other uses.
“Our local officials need to be more sensitive to the values of agricultural land as compared to the developer, who just wants to buy land and develop it without any consideration of the land around it,” said Somerville, who is also a Canyon Soil Conservation District board member and a state Association of Soil Conservation Districts regional director.
Last month’s 2017 Census of Agriculture charts a 20-year decline in farmland across the Northwest and California. The drop is significant nationwide but in Oregon, Washington, Idaho and California, it is especially troubling.
Between 1997 and 2017, crop acres fell 13.7% in Oregon, 9.7% in Washington, 8.7% in Idaho and 13.2% in California. Nationwide, the average shrinkage was 10.9%.
During the same 20 years, the number of pasture acres dropped by 11.25% in Oregon, 17.4% in Washington, 7.6% in Idaho and 22.5% in California. Nationwide, the acreage was about even.
While those numbers are daunting, the shrinkage in farmland has slowed in some parts of the West.
For example, Marion County, the heart of Oregon’s fertile Willamette Valley, reported 9.7% fewer crop acres in 2017 compared to 1997. However, the trend reversed after 2012, and was up 8.7% by 2017 as more farmland was put into production for such crops as hazelnuts.
In Canyon County, Idaho, where Somerville farms, crop acres were down 9.5% from 1997 but are up 0.72% since 2012. Pasture acres fell 65.8% from 1997 to 2017.
Just east of Canyon County in Ada County, which includes Boise, Meridian and Eagle, cropland acres dropped 31.5% in 20 years but rebounded 17.6% between 2012 and 2017.
Part of the change in cropland can be attributed to how USDA counts it. USDA says a “farm” produces or sells at least $1,000 in agricultural products in the survey year, or would normally. Because of that, changes in the amount of land in farms don’t always directly equate to direct gains or losses of agricultural land.
The USDA also says enough agricultural activity can warrant categorizing land as farmland even though it doesn’t meet the $1,000 threshold.
Chris Mertz, director of the USDA’s National Agricultural Statistics Service Northwest Regional Field Office in Olympia, said in Washington in 2017, 35% of farms reported sales of less than $1,000 but had enough ag activity to be considered a farm. The percentages were 31 in Oregon and 30 in Idaho.
Idle cropland and Conservation Reserve Program ground receiving federal government payments are considered farmland, as are animal and tree operations, he said. Government-leased grazing land is not, although cattle are counted separately. Also not considered farmland: pasture less than 100 acres lacking ag activity.
About 12 years ago, Somerville retired as the USDA Natural Resources Conservation Service state conservationist for Arizona and bought his 40-acre, irrigated farm in Idaho.
Arizona allows agricultural land to be developed only if it adjoins a municipality. This is in contrast to “hopscotch” or “spot” development seen in parts of southwest Idaho for the past two decades.
“There have been 40-acre developments put in Canyon County with cropland surrounding the whole thing,” Somerville said.
NRCS, community planning groups and others have data about land characteristics ranging from soil quality and climate patterns to water availability. There is potential to tap it more, he said.
“Some land is more valuable as agricultural,” Somerville said. “But the prime land is also cheapest to develop because it has fewer limitations.”
His farm was wind-eroded when he bought it following years of low-residue crop production in sandy soil. Locally, he has also seen low-value crops planted on high-quality land. Typically, he said, that happens when a landowner is biding time before developing the land.
Farmers can help stem land loss by planting the right crops in the right places, Somerville said. This could narrow the gap between a parcel’s agricultural value and its development value, ultimately reducing the incentive for builders to buy extra land just because it is cheap.
As importantly, preserving farmland requires farmers and others to be involved, he said.
“We always say farmers are forced to sell,” Somerville said. “You are not forced to sell. You have to participate in this process with city and county government and with the whole community. We are not just independently out here farming. We are participating in a whole-community process.”
Canyon County Development Services Director Tricia Nilsson said an agriculture committee operating for the past 18 months has identified several agricultural areas worth preserving. The county will soon consider the committee’s input in updating its 2012 comprehensive plan.
“It fluctuates, but generally over 90% of the population growth is happening within city limits,” she said. “We do have a lot of growth, but we also have a lot of investment in agriculture and a lot more processing of commodities.
“One thing the ag committee is talking about is supply chain to our processing in Canyon County and elsewhere in Idaho,” Nilsson said. “It’s not land waiting to get developed. It is serving a huge economic purpose today.”
Oregon Department of Agriculture Land Use and Water Planning Coordinator Jim Johnson said not all farmland losses are in urban areas. Land in farms in mostly rural Klamath County fell about 26% from 2012 to 2017 for reasons that include water shutoffs and drought.
Oregon land-use law aims to preserve farmland but is not a cure-all.
“A lot of people always look at conversion to be some some subset to urbanization, and that is true,” Johnson said. “But there are some 50 non-farm-related uses that can be approved in the Exclusive Farm Use Zone.” Energy generation and utilities, aggregate mining, golf courses, parks and other recreation uses are examples.
Some good news: “Oregon’s statewide trend is still land going out of production, but at a much slower rate,” he said.