Bobiec, AndrzejBobiec, Andrzej2026-03-162026-03-162026https://rdb.ur.edu.pl/handle/item/89The data provide quantitative representation of the natural oak regeneration in non-forest rural landscapes of S and SE Poland.As many as 2595 oak saplings taller than 50 cm and young oak trees have been inventored and mensurated in 10 spatial clusters representing post-agricultural landscapes of Upper Silesia (S Poland) and Subcarpathia (SE Poland). The measurements were performed in four growing seasons: from 2022 to 2024. All saplings were precisely georeferenced with a high-accurracy geodesic GNSS system, the following parameters were measured: height, stem diameter at the ground level, DBH in saplings taller than 130 cm, the mean radius of the crown projection. All data descritpion (metadata) is provided in the spreadsheet.enCC0 1.0 Universalhttp://creativecommons.org/publicdomain/zero/1.0/Oak saplingsAbandoned farmlandSouthern PolandSapling biometricsGeoreferencingraw dataset