Table 2 Regeneration categories established, recording methods, cohort classification in the 5-m plot of the National Forest Inventory (NFI) sampling points, and expansion factor to values per hectare
From: National scale variability in forest stand variables among regions of provenances in Spain
NFI regeneration categories | Recording method | Cohort | Expansion factor |
|---|---|---|---|
(1) Height < 30 cm | Abundance classes (0, 1, 2, 3) | Seedlings | 127.32 |
(2) 30 ≤ height < 130 cm | Abundance classes (0, 1, 2, 3) | Seedlings | 127.32 |
(3) Height ≥ 130 cm and dbh < 2.5 cm | Abundance classes (0, 1, 2, 3) | Saplings | 127.32 |
(4) Height ≥ 1.3 m and 2.5 ≤ dbh < 7.5 cm | Count (number of plants) | Saplings | 127.32 |