On a sunny morning in July, Alicia Jabbar’s tank top is wet with sweat along her spine from the nape of her neck to the small of her back. She climbs onto the horizontal ledges at the bottom of a metal stake next to an ankle-high tomato plant. Jabbar, who’s wearing two ponytails under a baseball cap, has to use all of her body weight to push the stake into the earth. When she’s done with a row, she stands on tiptoes in her running shoes to drop a metal cylinder with two handles on the top of each stake.

Clang. Clang. Clang. Clang. The noise echoes off the trees.

“Twelve more rows,” she says.

“What time is it?” her friend Jessica Stanley calls. She’s busy looping string from a box at her waist around the stakes to support the tomato plants.

“Ten-thirty, and we’re halfway done,” Jabbar, 26, replies. They’ve been working since 7 a.m. and staking for the past two hours. “Sore back?”

Stanley says with a sigh: “There’s no way to avoid it. I try to move my hands in a different way — doesn’t matter. Well, I guess I’ll pound with you.”

Stanley, 26, who’s working in a camisole tank top, lives in an uninsulated barn on the farm and spends more than 50 hours a week weeding, mulching, harvesting and selling at farmers markets.

Just a year ago, she was making $110,000 a year at Cisco Systems in Herndon, often telecommuting from the two-bedroom condo she owns in Georgetown. Now, she makes $7 an hour. She and Jabbar, along with Jabbar’s fiance, Steve Hirschhorn, work for Chip and Susan Planck on Wheatland Vegetable Farms in Loudoun County.