Okonek_1_year_after_planting.csv

The dataset contains results of measurements carried out on an experimental plot in the Okonek Forest District in northern Poland (53° 33’ N, 16° 56’ E). The study area was divided into 45 plots (approximately 400 m2 each) as a randomized complete block design with three replications of combinations of three mechanical site preparation (MSP) methods and five logging residue treatment (LR) methods. Tree measurements were made in 2005 (one year after planting) and in 2016 (12 years after planting).

Description of variables:

MSP - mechanical site preparation methods:

A – bedding and planting on ridges (later referred to as SP-bed), where the soil was plowed twice with an LPz-75 V-plow (manufactured by Center for Forest Technology in Jarocin, Poland), thus creating a raised bed (Fig. 2, top).

B – plowing and planting in furrows (SP-furrow), where the soil was plowed once using an LPz-75 V-plow (Fig. 2, middle).

C – disc trenching (SP-trench), where the soil was scarified with an active disc plow U-162 (Center for Forest Technology in Jarocin, Poland) and trees were planted in the shallow furrow (Fig. 2, bottom).

LR - logging residue treatments:

1 - Complete removal, where all the logging residues were thoroughly lifted and manually carried outside the (later referred to as LR-1).

2 - Incineration, where all the logging residues were lifted and burned on small heaps inside the plot (LR-2).

3 - Leaving whole, where all the logging residues were left spread evenly on the ground, and only the longest branches were cut into large pieces (LR-3).

4 - Comminution and leaving on the surface, where the logging residues were crushed using a DVV-96 crusher (Center for Forest Technology in Jarocin, Poland) (LR-4).

5 - Comminution and mixing with topsoil, where the logging residues were crushed using a DVV-96 crusher and mixed with topsoil with a disc harrow (LR-5).

DBH - diameter at breast height.

HEIGHT – tree height.