The phrase "a narrow tract" is correct and usable in written English.
It can be used to describe a small or limited area of land or space, often in a geographical or environmental context.
Example: "The hikers followed a narrow tract of land that wound through the dense forest."
Alternatives: "a narrow strip" or "a narrow area".
A good road leads to the southern ridge of the Hotha valley, which is crossed by a narrow tract.
The next phase of the war, he said on January 14th, would oblige the army to reoccupy the so-called "Philadelphi Route", a narrow tract of land on the Gaza side of the strip's border with Egypt.
The coastal plain comprises a narrow tract in the south, sloping from Salpausselkä to the Gulf of Finland; the plains in the southwestern part of the country; and the broad western coastal lowlands of the region of Pohjanmaa (Ostrobothnia) facing the Gulf of Bothnia.
The reservation now is a narrow, wooded tract with fewer than a dozen buildings and even fewer people.
With Mr. Thomas, who was also their architect, they came up with the idea of a Z-shaped house that winds through the trees and fits the narrow tract well.
It was dark by the time the prop plane whistled and shuddered across the narrow tract of Mediterranean that separates Sicily from the northern coast of Africa -- an hour's flight -- and landed at the Tunis airport.
Flood plain (cultivated lands) is are mainly restricted to the narrow tract of the River Nile Valley.
In the case of stenosis, dilation of the narrow tract is the usually the first approach, whereas in the case of leaks and fistulas bile diversion with drainage is usually attempted in order to seal the fistulous tract.
"The 'ribbon of respectability' - the narrow tract from Thirty-Fourth stoeet to Fifty-Seventh street, between Fourth and Sixth Avenues - becomes a sort of brick and cobblestone Sahara".
"The 'ribbon of respectability' - the narrow tract from Thirty-Fourth stoeet to Fifty-Seventh street, between Fourth and Sixth Avenues - becomes a sort of brick and cobblestone Sahara". Today's ribbons of respectability - 5th and Park - stand similarly vacant today.
All of these molecules give binding enthalpies Δ Hb = ∼−5 kcal/mol or less and a significant entropy component at 25 °C with an AATT sequence which has a narrow, A-tract type, minor groove geometry.
