§ 512. Essentials of adverse possession under written instrument or judgment. For the purpose of constituting an adverse possession, founded upon a written instrument or a judgment or decree, land is deemed to have been possessed and occupied in any of the following cases:

1. Where there has been acts sufficiently open to put a reasonably diligent owner on notice.

2. Where it has been protected by a substantial enclosure, except as provided in subdivision one of section five hundred forty-three of this article.

3. Where, although not enclosed, it has been used for the supply of fuel or of fencing timber, either for the purposes of husbandry or for the ordinary use of the occupant.

Where a known farm or a single lot has been partly improved, the portion of the farm or lot that has been left not cleared or not enclosed, according to the usual course and custom of the adjoining country, is deemed to have been occupied for the same length of time as the part improved and cultivated.