The phrase "a patch of field" is correct and usable in written English.
It can be used to describe a small area of land, typically used for farming or as a natural space.
Example: "The farmer decided to plant vegetables in a patch of field near the river."
Alternatives: "a piece of land" or "a section of field".
Carlin Isles skipped out on a chance at the 2012 Olympics as a sprinter to chase a career in rugby, and Perry Baker, whose legs seem to unravel endlessly from his torso, wowed the spectators inside Sam Boyd Stadium every time he found a patch of open field in front of him.
On the afternoon of Oct. 7, 1968, minutes before the first pitch of Game 5 of the World Series, NBC cameras were trained on a patch of center field in Tiger Stadium, where the Latin pop-jazz guitarist José Feliciano began to sing the national anthem.
Just in time for the fall semester of 1956, as Dwight Eisenhower sat in the White House and the first baby boomers were turning 10, a tiny, new college sprouted on a patch of squash fields and orange groves in the far-flung Los Angeles suburb of Northridge.
I had known the joy of victory when I captained my second-year team in primary school, at the age of seven, during which we put the boys in the third year to the sword on a bald patch of field at Methodist Primary School, Ikot Obong Edong, using a lemon as a ball.
And: "I am the Cartwright girl, dumped once upon a time with a strangled college student and a stack of human bones out past Highway 10, in an abandoned patch of field near the Jenkins property.
Most destruction is happening in one spot: the "South Atlantic Anomaly," a patch of reversed magnetic field lines that emerge into space near the southern parts of Africa and South America.
Sixty-one years ago, Levitt began mass-producing homes on a patch of Long Island potato fields.
Mr. Phiri and his fellow diamond smugglers had gotten into an argument with the soldier because, for the second consecutive night, he had directed them to a patch of the rich fields where there were no diamonds to be mined.
On the command of the master, hounds move off to draw (search) the covert, which may be a woodland, a patch of gorse, or a field in which it is suspected that a fox may be hiding.
