WASHINGTON — Donald Trump said Thursday that he expects that former Georgia Gov. Sonny Perdue, his choice to lead the Agriculture Department, will “deliver big results for all Americans who earn their living off the land.”

Agriculture secretary was the final Cabinet post to be announced by Trump, who is set to take office Friday.

Perdue, 70, is a farmer’s son who built businesses in grain trading and trucking before becoming the first Republican governor of Georgia since Reconstruction.

Perdue, from the small city of Bonaire in rural central Georgia, would be the first Southerner in the post in more than two decades. He is not related to or affiliated with the food company Perdue or the poultry producer Perdue Farms.

“From growing up on a farm to being governor of a big agriculture state, he has spent his whole life understanding and solving the challenges our farmers face, and he is going to deliver big results for all Americans who earn their living off the land,” Trump said in a statement.

Perdue, in a statement released by Trump’s transition team, said he began as “a simple Georgia farm boy,” and he pledged to “champion the concerns of American agriculture and work tirelessly to solve the issues facing our farm families.”

Agriculture secretaries are often from the Midwest, where corn and soybeans dominate the markets. U.S. farm policy has long been favorable to those crops, and congressional battles over massive farm bills every five years often divide along regional lines. Southerners have pushed for subsidy programs that are more favorable to rice and cotton, which can be more expensive to grow.

The last three agriculture secretaries were from Iowa, North Dakota and Nebraska. Many farm-state lawmakers and agriculture groups grew concerned as Trump approached his inauguration without having named an agriculture secretary candidate. Earlier Thursday, Iowa Sen. Chuck Grassley tweeted that he was frustrated with the process.

“NEED Ag leader w dirt under finger nails 4farmers,” he wrote.

Perdue began his political career as a Democrat in the Georgia Legislature in the 1990s. After switching his allegiance to the Republican Party, he was elected governor in 2002. The victory over an incumbent Democrat completed Georgia’s shift to a solidly Republican state, ending generations of Democratic control.

Despite that political change, Perdue showed little interest in pushing big programs or signature legislation during his two terms. Instead he focused on finding ways to save money while improving customer service by state agencies.

Critics accused Perdue of failing to tackle some of Georgia’s biggest problems, such as struggling public schools.

Perdue, who was re-elected in 2006, didn’t rely only on his business acumen as governor. A devout Southern Baptist, he also found a place for faith in his administration. In 2007, when a withering drought gripped Georgia and neighboring states, he held a prayer rally in front of the Capitol in Atlanta to pray for rain.

Under Perdue’s watch, Georgia adopted tough food-safety regulations after a deadly U.S. salmonella outbreak was traced to Georgia-made peanut butter.