Mensah_2022_BA: Basal Area development in conifer stands in Sweden.

In Silviculturalist/forester: Forest Science and Forestry

Basal Area development in conifer stands in Sweden.

Description

Note: BA should be given for age>40 for Norway Spruce or Scots Pine.For Larch and Lodgepole Pine, age should be 30. The function will throw a warning.

Usage

Mensah_2022_BA_Sweden_Scots_Pine(BA, age, age2, stems, H100)

Mensah_2022_BA_Sweden_Norway_Spruce(BA, age, age2, stems, H100)

Mensah_2022_BA_Sweden_Lodgepole_Pine(BA, age, age2, stems, H50)

Mensah_2022_BA_Sweden_Larch(BA, age, age2, stems, H100)

Arguments

BA	Basal area at breast height, m2 / ha.
age	Total stand age at start.
age2	Total stand age desired.
stems	Number of stems per hectare at start.
H100	Site Index H100 e.g. Scots Pine [forester::Elfving_Kiviste_1997_height_trajectory_Sweden_Pine()] Norway Spruce [forester::Elfving_2003_height_trajectory_Sweden_Spruce()] Lodgepole Pine [forester::Liziniewicz_2016_height_trajectory_Sweden_Pinus_contorta()] Larch [forester::Johansson_2013_height_trajectory_Sweden_Larch()]
H50	Site Index H50, see parameter H100

Details

Table of fit-statistics for basal area functions:

Species	RMSE (%)	MD (%)	n
Scots Pine	1.09(3.39)	-0.15(-0.47)	3447
Norway Spruce	0.97(2.14)	-0.10(-0.22)	984
Lodgepole pine	1.22(3.29)	-0.01(-0.03)	237
Larch	2.79(5.78)	-0.29(-0.59)	78

Value

Expected BA m2 / ha at age2.

Source

Mensah, A. A., Holmström, E., Nyström, K., Nilsson, U. 2022. Modelling potential yield capacity in conifers using Swedish long-term experiments. For. Ecol. Manage. 512. Available online (2022-04-08): https://doi.org/10.1016/j.foreco.2022.120162

Silviculturalist/forester documentation built on April 20, 2024, 2:13 p.m.