Definition of "barton"

There's the barton rich / With dyke and ditch / And hedge for the thrush to live in [...].

1816, John Keats, For there's Bishop's Teign

So fair a fancy few would weave / In these years! Yet, I feel, / If someone said on Christmas Eve, / “Come; see the oxen kneel, / “In the lonely barton by yonder coomb / Our childhood used to know,” / I should go with him in the gloom, / Hoping it might be so.

1915, Thomas Hardy, The Oxen