PM_Vol: Volume function for for even-aged monocultures or mixed...

In Silviculturalist/forester: Forest Science and Forestry

Volume function for for even-aged monocultures or mixed stands in Sweden.

Description

Volume function for for even-aged monocultures or mixed stands in Sweden.

Usage

Eko_PM_1985_volume_central_Sweden_Pine(
  basal_area.m2,
  basal_area_other_species,
  age_at_breast_height,
  stem_number_ha,
  SI,
  thinned,
  basal_area_weighted_mean_diameter,
  basal_area_weighted_mean_diameter_other_species
)

Eko_PM_1985_volume_northern_Sweden_Pine(
  basal_area.m2,
  basal_area_other_species,
  age_at_breast_height,
  stem_number_ha,
  SI,
  thinned_previous_five_years,
  thinned_before_previous_five_years,
  basal_area_weighted_mean_diameter,
  basal_area_weighted_mean_diameter_other_species
)

Eko_PM_1985_volume_southern_Sweden_Pine(
  basal_area.m2,
  basal_area_other_species,
  age_at_breast_height,
  stem_number_ha,
  SI,
  thinned,
  vegetation,
  basal_area_weighted_mean_diameter,
  basal_area_weighted_mean_diameter_other_species
)

Eko_PM_1985_volume_northern_Sweden_Spruce(
  basal_area.m2,
  basal_area_other_species,
  age_at_breast_height,
  stem_number_ha,
  SI,
  thinned,
  basal_area_weighted_mean_diameter,
  basal_area_weighted_mean_diameter_other_species
)

Eko_PM_1985_volume_central_Sweden_Spruce(
  basal_area.m2,
  basal_area_other_species,
  age_at_breast_height,
  stem_number_ha,
  SI,
  vegetation,
  thinned,
  basal_area_weighted_mean_diameter,
  basal_area_weighted_mean_diameter_other_species
)

Eko_PM_1985_volume_southern_Sweden_Spruce(
  basal_area.m2,
  basal_area_other_species,
  age_at_breast_height,
  stem_number_ha,
  SI,
  thinned,
  basal_area_weighted_mean_diameter,
  basal_area_weighted_mean_diameter_other_species
)

Eko_PM_1985_volume_northern_central_Sweden_Birch(
  basal_area.m2,
  basal_area_other_species,
  age_at_breast_height,
  stem_number_ha,
  SI,
  latitude,
  altitude,
  fertilised,
  thinned,
  basal_area_weighted_mean_diameter,
  basal_area_weighted_mean_diameter_other_species
)

Eko_PM_1985_volume_southern_Sweden_Birch(
  basal_area.m2,
  basal_area_other_species,
  age_at_breast_height,
  stem_number_ha,
  SI,
  latitude,
  fertilised,
  thinned,
  basal_area_weighted_mean_diameter,
  basal_area_weighted_mean_diameter_other_species
)

Eko_PM_1985_volume_northern_central_Sweden_Broadleaves(
  basal_area.m2,
  basal_area_other_species,
  age_at_breast_height,
  stem_number_ha,
  SI,
  latitude,
  altitude,
  thinned,
  basal_area_weighted_mean_diameter,
  basal_area_weighted_mean_diameter_other_species
)

Eko_PM_1985_volume_southern_Sweden_Broadleaves(
  basal_area.m2,
  basal_area_other_species,
  age_at_breast_height,
  stem_number_ha,
  SI,
  latitude,
  thinned,
  basal_area_weighted_mean_diameter,
  basal_area_weighted_mean_diameter_other_species
)

Eko_PM_1985_volume_Sweden_Beech(
  basal_area.m2,
  basal_area_other_species,
  age_at_breast_height,
  stem_number_ha,
  SI,
  thinned,
  basal_area_weighted_mean_diameter,
  basal_area_weighted_mean_diameter_other_species
)

Eko_PM_1985_volume_Sweden_Oak(
  basal_area.m2,
  basal_area_other_species,
  age_at_breast_height,
  stem_number_ha,
  SI,
  thinned,
  basal_area_weighted_mean_diameter,
  basal_area_weighted_mean_diameter_other_species
)

Arguments

basal_area.m2	Basal area over bark of Pine (m2/ha)
basal_area_other_species	Basal area of other species on the plot. (m2/ha)
age_at_breast_height	Age at breast height, calculated as the mean age of the two thickest trees (years).
stem_number_ha	Number of stems per hectare.
SI	Site index H100 Pine , m.
thinned	1 if the stand has been thinned before, otherwise 0.
basal_area_weighted_mean_diameter	Diameter corresponding to mean basal area (m).
basal_area_weighted_mean_diameter_other_species	Diameter corresponding to mean basal area (m) of other species on plot.
thinned_previous_five_years	1 if the stand has been thinned during the last five years, otherwise 0.
thinned_before_previous_five_years	1 if the stand has been thinned before the last five years, otherwise 0.
vegetation	Variable indicating vegetation type scaled from -5 to +4 as follows: Field Layer Code (NFI) Description Index 1 Tall herbs w/o dwarf shrubs 4 2 Tall herbs with bilberry 2.5 3 Tall herbs with cowberry 2 4 Low herbs w/o dwarf shrubs 3 5 Low herbs with bilberry 2.5 6 Low herbs with cowberry 2 7 No field layer 3 8 broad-leafed grasses 2.5 9 narrow-leaved grasses 1.5 10 Sedge, tall -3 11 Sedge, low -3 12 Horsetail 1 13 Bilberry 0 14 Cowberry -0.5 15 Crowberry -3 16 Poor shrub -5 17 Lichen-rich -0.5 18 Lichen-dominated -1
latitude	Degrees.
altitude	Meters above sea level.
fertilised	1 if the stand has been fertilised, otherwise 0.

Value

m3sk.

Source

Ekö, Per Magnus (1985) "En produktionsmodell för skog i Sverige, baserad på bestånd från riksskogstaxeringens provytor: A growth simulator for Swedish forests, based on data from the national forest survey. Rapporter nr. 16. Swedish University of Agricultural Sciences, dept. of Silviculture. Umeå. ISBN 91-576-2386-4. ISSN 0348-8969. p. 105

@description Pine, northern Sweden Multiple correlation coefficient: 0.98

Standard deviation about the function: 0.23

Sf/Standard deviation about the mean: 0.17 Pine, central Sweden Multiple correlation coefficient: 0.98

Standard deviation about the function: 0.23

Sf/standard deviation about the mean: 0.17

Pine, southern Sweden Multiple correlation coefficient: 0.98

Standard deviation about the function: 0.23

Sf/standard deviation about the mean: 0.18

Norway Spruce, northern Sweden Multiple correlation coefficient: 0.98

Standard deviation about the function: 0.29

Sf/standard deviation about the mean: 0.20 Norway Spruce, central Sweden Multiple correlation coefficient: 0.98

Standard deviation about the function: 0.29

Sf/standard deviation about the mean: 0.20

Norway Spruce, southern Sweden Multiple correlation coefficient: 0.99

Standard deviation about the function: 0.25

Sf/standard deviation about the mean: 0.17

Birch, northern and central Sweden Multiple correlation coefficient: 0.95

Standard deviation about the function: 0.39

Sf/Standard deviation about the mean: 0.32

Birch, southern Sweden Multiple correlation coefficient: 0.96

Standard deviation about the function: 0.35

Sf/Standard deviation about the mean: 0.26

Broadleaves, northern and central Sweden Multiple correlation coefficient: 0.94

Standard deviation about the function: 0.41

Sf/Standard deviation about the mean: 0.33

Broadleaves, southern Sweden Multiple correlation coefficient: 0.97

Standard deviation about the function: 0.37

Sf/Standard deviation about the mean: 0.26

Beech Multiple correlation coefficient: 0.99

Standard deviation about the function: 0.28

Sf/Standard deviation about the mean: 0.17

Oak Multiple correlation coefficient: 0.97

Standard deviation about the function: 0.39

Sf/Standard deviation about the mean: 0.26

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