ElfvingHagglund1975: Stems per hectare for young stands of Scots Pine in northern...
In Silviculturalist/forester: Forest Science and Forestry
ElfvingHagglund1975 R Documentation
Stems per hectare for young stands of Scots Pine in northern Sweden.
Description
Initial stand conditions for Norway Spruce and Scots Pine in Sweden.
Usage
Elfving_Hagglund_1975_initial_stems_young_forests_northern_Sweden_Pine(
latitude,
altitude,
stand_density = 0.65,
dominant_height,
PCT,
even_or_somewhat_uneven_aged,
uneven_aged
)
Elfving_Hagglund_1975_initial_stems_young_forests_northern_Sweden_Spruce(
stand_density = 0.65,
PCT,
SI,
altitude,
broadleaves_percent_of_basal_area,
even_or_somewhat_uneven_aged,
uneven_aged
)
Elfving_Hagglund_1975_initial_stems_young_forests_southern_Sweden_Pine(
stand_density = 0.65,
PCT,
age_at_breast_height = "function",
latitude = 60,
SI,
dominant_height = 12.5,
regeneration = "culture"
)
Elfving_Hagglund_1975_initial_stems_young_forests_southern_Sweden_Spruce(
stand_density = 0.65,
PCT,
SI,
age_at_breast_height,
altitude,
broadleaves_percent_of_basal_area,
even_or_somewhat_uneven_aged
)
Elfving_Hagglund_1975_initial_basal_area_young_forests_northern_Sweden_Pine(
latitude,
altitude,
stand_density = 0.65,
stems = "function",
SI,
dominant_height,
broadleaves_percent_of_basal_area,
PCT,
even_or_somewhat_uneven_aged = TRUE
)
Elfving_Hagglund_1975_initial_basal_area_young_forests_northern_Sweden_Spruce(
altitude,
stand_density = 0.65,
stems = "function",
SI,
broadleaves_percent_of_basal_area = 0,
dominant_height,
spatial_distribution,
PCT,
uneven_aged = FALSE
)
Elfving_Hagglund_1975_initial_basal_area_young_forests_southern_Sweden_Pine(
altitude,
stand_density = 0.65,
stems = "function",
SI,
dominant_height,
uneven_aged = FALSE,
age_at_breast_height = "function",
regeneration,
PCT
)
Elfving_Hagglund_1975_initial_basal_area_young_forests_southern_Sweden_Spruce(
altitude,
stems = "function",
dominant_height,
broadleaves_percent_of_basal_area,
spatial_distribution,
PCT,
stand_density,
SI,
age_at_breast_height = "function",
even_or_somewhat_uneven_aged,
regeneration = "culture"
)
Arguments
latitude
Latitude, degrees N.
altitude
meters above sea level.
stand_density
0-1
dominant_height
Dominant height of stand, meters.
PCT
1 if Pre-commercial thinning has occurred, otherwise 0.
even_or_somewhat_uneven_aged
TRUE/FALSE if stand is even, or somewhat uneven-aged.
uneven_aged
TRUE/FALSE if stand is uneven-aged.
SI
Site index H100 m.
broadleaves_percent_of_basal_area
Percent of basal area composed of broadleaves.
age_at_breast_height
Age at breast height, years.
regeneration
How was the stand established? One of "culture", "natural regeneration" or "unknown". Only required if age_at_breast_height=="function"
stems
Number of Stems / ha.
spatial_distribution
1 if even. 2 if somewhat uneven. 3 if grouped.
Details
*OBSERVE*
**For stems thicker than 2.5 cm at breast height.**
Function 5.1.
Number of sites = 426.
Mean stems per ha: 7.2151
Standard deviation mean stems per ha: 0.571
standard deviation about the function: 0.394
R = 0.73
Cp = 12. (Daniel & Wood 1971, pp. 86)
*OBSERVE*
**For stems thicker than 2.5 cm at breast height.**
Function 5.3.
Number of sites = 262.
Mean stems per ha: 7.6012
Standard deviation mean stems per ha: 0.533
standard deviation about the function: 0.416
R = 0.64
Cp = 5 (Daniel & Wood 1971, pp. 86)
*OBSERVE*
**For stems thicker than 2.5 cm at breast height.**
Function 5.2.
Number of sites = 235.
Mean stems per ha: 7.3192
Standard deviation mean stems per ha: 0.523
standard deviation about the function: 0.371
R = 0.72
Cp = 7. (Daniel & Wood 1971, pp. 86)
*OBSERVE*
**For stems thicker than 2.5 cm at breast height.**
Function 5.4.
Number of sites = 183.
Mean stems per ha: 7.6675
Standard deviation mean stems per ha: 0.501
standard deviation about the function: 0.381
R = 0.67
Cp = 5 (Daniel & Wood 1971, pp. 86)
F. 6.1
N = 426
Mean basal area per hectare = 7.190
Standard deviation about the mean = 0.496
Standard deviation about the function = 0.334
R = 0.76
F. 6.3
N = 262
Mean basal area per hectare = 7.411
Standard deviation about the mean = 0.452
Standard deviation about the function = 0.273
R = 0.80
F. 6.2
N = 235
Mean basal area per hectare = 7.465
Standard deviation about the mean = 0.440
Standard deviation about the function = 0.280
R = 0.71
F. 6.4
N = 183
Mean basal area per hectare = 7.531
Standard deviation about the mean = 0.470
Standard deviation about the function = 0.306
R = 0.74
Value
Number of Stems thicker than 2.5 cm per ha.
Stems thicker than 2.5 cm per ha.
Stems thicker than 2.5 cm per ha.
Stems thicker than 2.5 cm per ha.
Basal area per hectare, m^2.
Basal area per hectare, m^2.
Basal area per hectare, m^2.
Basal area per hectare, m^2.
Source
Elfving, B., Hägglund, B. (1975) Utgångslägen för produktionsprognoser: Tall och gran i Sverige.
/ Initial stands for yield forecasts: Scots pine and Norway spruce in Sweden. Research Notes #38. Dept. of
Forest Yield Research. Royal College of Forestry. Stockholm. p. 53. pp. 75.
Examples
ggplot()+
geom_function(aes(linetype=">22, 200masl"), fun= function(x)
Elfving_Hagglund_1975_initial_stems_young_forests_northern_Sweden_Spruce(stand_density = x,
PCT = FALSE,
SI = 23,
altitude = 200,
broadleaves_percent_of_basal_area = 0,
even_or_somewhat_uneven_aged = TRUE,
uneven_aged = FALSE) )+
geom_function(aes(linetype="<22, 500masl"), fun= function(x)
Elfving_Hagglund_1975_initial_stems_young_forests_northern_Sweden_Spruce(stand_density = x,
PCT = FALSE,
SI = 21,
altitude = 500,
broadleaves_percent_of_basal_area = 0,
even_or_somewhat_uneven_aged = TRUE,
uneven_aged = FALSE) )+
xlim(c(0.4,0.9))+
geom_function(aes(linetype="h<22, 200masl"), fun= function (x)
Elfving_Hagglund_1975_initial_stems_young_forests_northern_Sweden_Spruce(stand_density = x,
PCT = FALSE,
SI = 21,
altitude = 200,
broadleaves_percent_of_basal_area = 0,
even_or_somewhat_uneven_aged = TRUE,
uneven_aged = FALSE ))
ggplot()+
geom_function(aes(linetype="G20"), fun= function(x) Elfving_Hagglund_1975_initial_stems_young_forests_southern_Sweden_Spruce(
stand_density = x,PCT = FALSE,SI = 20,age_at_breast_height = 44.6,altitude=100,broadleaves_percent_of_basal_area = 0,even_or_somewhat_uneven_aged = TRUE
) )+
geom_function(aes(linetype="G32"), fun= function(x) Elfving_Hagglund_1975_initial_stems_young_forests_southern_Sweden_Spruce(
stand_density = x,PCT = FALSE,SI = 32,age_at_breast_height = 21,altitude=100,broadleaves_percent_of_basal_area = 0,even_or_somewhat_uneven_aged = TRUE
) )+
xlim(c(0.4,1.0))
ggplot()+
geom_function(aes(linetype="66N 400masl 16m"), fun= function(x) Elfving_Hagglund_1975_initial_basal_area_young_forests_northern_Sweden_Pine(latitude = 66,altitude = 400,
stand_density = x, stems = "function",SI = 16,dominant_height = 12.5,broadleaves_percent_of_basal_area = 0,PCT = FALSE,even_or_somewhat_uneven_aged = TRUE)
)+
geom_function(aes(linetype="62N 200masl 24m"), fun= function(x) Elfving_Hagglund_1975_initial_basal_area_young_forests_northern_Sweden_Pine(latitude = 62,altitude = 200,
stand_density = x, stems = "function",SI = 24,dominant_height = 12.5,broadleaves_percent_of_basal_area = 0,PCT = FALSE,even_or_somewhat_uneven_aged = TRUE)
)+
xlim(c(0.4,1.0))
ggplot()+
geom_function(aes(linetype="16,500"), fun = function(x) Elfving_Hagglund_1975_initial_basal_area_young_forests_northern_Sweden_Spruce(altitude = 500,stand_density = x,stems = "function",SI = 16,broadleaves_percent_of_basal_area = 0,dominant_height = 12.5,spatial_distribution = 1,PCT = FALSE,uneven_aged = FALSE))+
geom_function(aes(linetype="16,200"), fun = function(x) Elfving_Hagglund_1975_initial_basal_area_young_forests_northern_Sweden_Spruce(altitude = 200,stand_density = x,stems = "function",SI = 16,broadleaves_percent_of_basal_area = 0,dominant_height = 12.5,spatial_distribution = 1,PCT = FALSE,uneven_aged = FALSE))+
geom_function(aes(linetype="28,200"), fun = function(x) Elfving_Hagglund_1975_initial_basal_area_young_forests_northern_Sweden_Spruce(altitude = 200,stand_density = x,stems = "function",SI = 28,broadleaves_percent_of_basal_area = 0,dominant_height = 12.5,spatial_distribution = 1,PCT = FALSE,uneven_aged = FALSE))+
xlim(c(0.4,1.0))+
scale_y_continuous(limits = c(8,28),breaks=c(seq(8,28,2)))
ggplot()+
geom_function(aes(linetype="h100=16"), fun= function (x) Elfving_Hagglund_1975_initial_basal_area_young_forests_southern_Sweden_Pine(altitude = 300,
stand_density = x,
stems = "function" ,
SI = 16 ,
dominant_height = 12.5 ,
uneven_aged = FALSE,
age_at_breast_height = "function" ,
regeneration = "culture",
PCT = FALSE))+
geom_function(aes(linetype="h100=24"), fun= function (x) Elfving_Hagglund_1975_initial_basal_area_young_forests_southern_Sweden_Pine(altitude = 300,
stand_density = x,
stems = "function" ,
SI = 24 ,
dominant_height = 12.5 ,
uneven_aged = FALSE,
age_at_breast_height = "function" ,
regeneration = "culture",
PCT = FALSE))+
xlim(c(0.4,1))+
scale_y_continuous(limits=c(8,24),breaks=seq(8,24,2))
ggplot()+
geom_function(aes(linetype="G20"), fun = function(x) Elfving_Hagglund_1975_initial_basal_area_young_forests_southern_Sweden_Spruce(altitude = 300,
stems = "function" ,
dominant_height = 12.5 ,
broadleaves_percent_of_basal_area = 0,
spatial_distribution = 1 ,
PCT = FALSE,
stand_density = x,
SI = 20,
age_at_breast_height = "function" ,
even_or_somewhat_uneven_aged = TRUE ,
regeneration = "culture"))+
geom_function(aes(linetype="G36"), fun = function(x) Elfving_Hagglund_1975_initial_basal_area_young_forests_southern_Sweden_Spruce(altitude = 300,
stems = "function" ,
dominant_height = 12.5 ,
broadleaves_percent_of_basal_area = 0,
spatial_distribution = 1 ,
PCT = FALSE,
stand_density = x,
SI = 36,
age_at_breast_height = "function" ,
even_or_somewhat_uneven_aged = TRUE ,
regeneration = "culture"))+
xlim(c(0.4,1))+
scale_y_continuous(limits=c(8,28), breaks = seq(8,28,2))
Silviculturalist/forester documentation built on April 20, 2024, 2:13 p.m.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
| ElfvingHagglund1975 | R Documentation |
Stems per hectare for young stands of Scots Pine in northern Sweden.
Description
Initial stand conditions for Norway Spruce and Scots Pine in Sweden.
Usage
Elfving_Hagglund_1975_initial_stems_young_forests_northern_Sweden_Pine(
latitude,
altitude,
stand_density = 0.65,
dominant_height,
PCT,
even_or_somewhat_uneven_aged,
uneven_aged
)
Elfving_Hagglund_1975_initial_stems_young_forests_northern_Sweden_Spruce(
stand_density = 0.65,
PCT,
SI,
altitude,
broadleaves_percent_of_basal_area,
even_or_somewhat_uneven_aged,
uneven_aged
)
Elfving_Hagglund_1975_initial_stems_young_forests_southern_Sweden_Pine(
stand_density = 0.65,
PCT,
age_at_breast_height = "function",
latitude = 60,
SI,
dominant_height = 12.5,
regeneration = "culture"
)
Elfving_Hagglund_1975_initial_stems_young_forests_southern_Sweden_Spruce(
stand_density = 0.65,
PCT,
SI,
age_at_breast_height,
altitude,
broadleaves_percent_of_basal_area,
even_or_somewhat_uneven_aged
)
Elfving_Hagglund_1975_initial_basal_area_young_forests_northern_Sweden_Pine(
latitude,
altitude,
stand_density = 0.65,
stems = "function",
SI,
dominant_height,
broadleaves_percent_of_basal_area,
PCT,
even_or_somewhat_uneven_aged = TRUE
)
Elfving_Hagglund_1975_initial_basal_area_young_forests_northern_Sweden_Spruce(
altitude,
stand_density = 0.65,
stems = "function",
SI,
broadleaves_percent_of_basal_area = 0,
dominant_height,
spatial_distribution,
PCT,
uneven_aged = FALSE
)
Elfving_Hagglund_1975_initial_basal_area_young_forests_southern_Sweden_Pine(
altitude,
stand_density = 0.65,
stems = "function",
SI,
dominant_height,
uneven_aged = FALSE,
age_at_breast_height = "function",
regeneration,
PCT
)
Elfving_Hagglund_1975_initial_basal_area_young_forests_southern_Sweden_Spruce(
altitude,
stems = "function",
dominant_height,
broadleaves_percent_of_basal_area,
spatial_distribution,
PCT,
stand_density,
SI,
age_at_breast_height = "function",
even_or_somewhat_uneven_aged,
regeneration = "culture"
)
Arguments
latitude |
Latitude, degrees N. |
altitude |
meters above sea level. |
stand_density |
0-1 |
dominant_height |
Dominant height of stand, meters. |
PCT |
1 if Pre-commercial thinning has occurred, otherwise 0. |
even_or_somewhat_uneven_aged |
TRUE/FALSE if stand is even, or somewhat uneven-aged. |
uneven_aged |
TRUE/FALSE if stand is uneven-aged. |
SI |
Site index H100 m. |
broadleaves_percent_of_basal_area |
Percent of basal area composed of broadleaves. |
age_at_breast_height |
Age at breast height, years. |
regeneration |
How was the stand established? One of "culture", "natural regeneration" or "unknown". Only required if age_at_breast_height=="function" |
stems |
Number of Stems / ha. |
spatial_distribution |
1 if even. 2 if somewhat uneven. 3 if grouped. |
Details
*OBSERVE* **For stems thicker than 2.5 cm at breast height.**
Function 5.1.
Number of sites = 426.
Mean stems per ha: 7.2151
Standard deviation mean stems per ha: 0.571
standard deviation about the function: 0.394
R = 0.73
Cp = 12. (Daniel & Wood 1971, pp. 86)
*OBSERVE* **For stems thicker than 2.5 cm at breast height.**
Function 5.3.
Number of sites = 262.
Mean stems per ha: 7.6012
Standard deviation mean stems per ha: 0.533
standard deviation about the function: 0.416
R = 0.64
Cp = 5 (Daniel & Wood 1971, pp. 86)
*OBSERVE* **For stems thicker than 2.5 cm at breast height.**
Function 5.2.
Number of sites = 235.
Mean stems per ha: 7.3192
Standard deviation mean stems per ha: 0.523
standard deviation about the function: 0.371
R = 0.72
Cp = 7. (Daniel & Wood 1971, pp. 86)
*OBSERVE* **For stems thicker than 2.5 cm at breast height.**
Function 5.4.
Number of sites = 183.
Mean stems per ha: 7.6675
Standard deviation mean stems per ha: 0.501
standard deviation about the function: 0.381
R = 0.67
Cp = 5 (Daniel & Wood 1971, pp. 86)
F. 6.1
N = 426
Mean basal area per hectare = 7.190
Standard deviation about the mean = 0.496
Standard deviation about the function = 0.334
R = 0.76
F. 6.3
N = 262
Mean basal area per hectare = 7.411
Standard deviation about the mean = 0.452
Standard deviation about the function = 0.273
R = 0.80
F. 6.2
N = 235
Mean basal area per hectare = 7.465
Standard deviation about the mean = 0.440
Standard deviation about the function = 0.280
R = 0.71
F. 6.4
N = 183
Mean basal area per hectare = 7.531
Standard deviation about the mean = 0.470
Standard deviation about the function = 0.306
R = 0.74
Value
Number of Stems thicker than 2.5 cm per ha.
Stems thicker than 2.5 cm per ha.
Stems thicker than 2.5 cm per ha.
Stems thicker than 2.5 cm per ha.
Basal area per hectare, m^2.
Basal area per hectare, m^2.
Basal area per hectare, m^2.
Basal area per hectare, m^2.
Source
Elfving, B., Hägglund, B. (1975) Utgångslägen för produktionsprognoser: Tall och gran i Sverige. / Initial stands for yield forecasts: Scots pine and Norway spruce in Sweden. Research Notes #38. Dept. of Forest Yield Research. Royal College of Forestry. Stockholm. p. 53. pp. 75.
Examples
ggplot()+
geom_function(aes(linetype=">22, 200masl"), fun= function(x)
Elfving_Hagglund_1975_initial_stems_young_forests_northern_Sweden_Spruce(stand_density = x,
PCT = FALSE,
SI = 23,
altitude = 200,
broadleaves_percent_of_basal_area = 0,
even_or_somewhat_uneven_aged = TRUE,
uneven_aged = FALSE) )+
geom_function(aes(linetype="<22, 500masl"), fun= function(x)
Elfving_Hagglund_1975_initial_stems_young_forests_northern_Sweden_Spruce(stand_density = x,
PCT = FALSE,
SI = 21,
altitude = 500,
broadleaves_percent_of_basal_area = 0,
even_or_somewhat_uneven_aged = TRUE,
uneven_aged = FALSE) )+
xlim(c(0.4,0.9))+
geom_function(aes(linetype="h<22, 200masl"), fun= function (x)
Elfving_Hagglund_1975_initial_stems_young_forests_northern_Sweden_Spruce(stand_density = x,
PCT = FALSE,
SI = 21,
altitude = 200,
broadleaves_percent_of_basal_area = 0,
even_or_somewhat_uneven_aged = TRUE,
uneven_aged = FALSE ))
ggplot()+
geom_function(aes(linetype="G20"), fun= function(x) Elfving_Hagglund_1975_initial_stems_young_forests_southern_Sweden_Spruce(
stand_density = x,PCT = FALSE,SI = 20,age_at_breast_height = 44.6,altitude=100,broadleaves_percent_of_basal_area = 0,even_or_somewhat_uneven_aged = TRUE
) )+
geom_function(aes(linetype="G32"), fun= function(x) Elfving_Hagglund_1975_initial_stems_young_forests_southern_Sweden_Spruce(
stand_density = x,PCT = FALSE,SI = 32,age_at_breast_height = 21,altitude=100,broadleaves_percent_of_basal_area = 0,even_or_somewhat_uneven_aged = TRUE
) )+
xlim(c(0.4,1.0))
ggplot()+
geom_function(aes(linetype="66N 400masl 16m"), fun= function(x) Elfving_Hagglund_1975_initial_basal_area_young_forests_northern_Sweden_Pine(latitude = 66,altitude = 400,
stand_density = x, stems = "function",SI = 16,dominant_height = 12.5,broadleaves_percent_of_basal_area = 0,PCT = FALSE,even_or_somewhat_uneven_aged = TRUE)
)+
geom_function(aes(linetype="62N 200masl 24m"), fun= function(x) Elfving_Hagglund_1975_initial_basal_area_young_forests_northern_Sweden_Pine(latitude = 62,altitude = 200,
stand_density = x, stems = "function",SI = 24,dominant_height = 12.5,broadleaves_percent_of_basal_area = 0,PCT = FALSE,even_or_somewhat_uneven_aged = TRUE)
)+
xlim(c(0.4,1.0))
ggplot()+
geom_function(aes(linetype="16,500"), fun = function(x) Elfving_Hagglund_1975_initial_basal_area_young_forests_northern_Sweden_Spruce(altitude = 500,stand_density = x,stems = "function",SI = 16,broadleaves_percent_of_basal_area = 0,dominant_height = 12.5,spatial_distribution = 1,PCT = FALSE,uneven_aged = FALSE))+
geom_function(aes(linetype="16,200"), fun = function(x) Elfving_Hagglund_1975_initial_basal_area_young_forests_northern_Sweden_Spruce(altitude = 200,stand_density = x,stems = "function",SI = 16,broadleaves_percent_of_basal_area = 0,dominant_height = 12.5,spatial_distribution = 1,PCT = FALSE,uneven_aged = FALSE))+
geom_function(aes(linetype="28,200"), fun = function(x) Elfving_Hagglund_1975_initial_basal_area_young_forests_northern_Sweden_Spruce(altitude = 200,stand_density = x,stems = "function",SI = 28,broadleaves_percent_of_basal_area = 0,dominant_height = 12.5,spatial_distribution = 1,PCT = FALSE,uneven_aged = FALSE))+
xlim(c(0.4,1.0))+
scale_y_continuous(limits = c(8,28),breaks=c(seq(8,28,2)))
ggplot()+
geom_function(aes(linetype="h100=16"), fun= function (x) Elfving_Hagglund_1975_initial_basal_area_young_forests_southern_Sweden_Pine(altitude = 300,
stand_density = x,
stems = "function" ,
SI = 16 ,
dominant_height = 12.5 ,
uneven_aged = FALSE,
age_at_breast_height = "function" ,
regeneration = "culture",
PCT = FALSE))+
geom_function(aes(linetype="h100=24"), fun= function (x) Elfving_Hagglund_1975_initial_basal_area_young_forests_southern_Sweden_Pine(altitude = 300,
stand_density = x,
stems = "function" ,
SI = 24 ,
dominant_height = 12.5 ,
uneven_aged = FALSE,
age_at_breast_height = "function" ,
regeneration = "culture",
PCT = FALSE))+
xlim(c(0.4,1))+
scale_y_continuous(limits=c(8,24),breaks=seq(8,24,2))
ggplot()+
geom_function(aes(linetype="G20"), fun = function(x) Elfving_Hagglund_1975_initial_basal_area_young_forests_southern_Sweden_Spruce(altitude = 300,
stems = "function" ,
dominant_height = 12.5 ,
broadleaves_percent_of_basal_area = 0,
spatial_distribution = 1 ,
PCT = FALSE,
stand_density = x,
SI = 20,
age_at_breast_height = "function" ,
even_or_somewhat_uneven_aged = TRUE ,
regeneration = "culture"))+
geom_function(aes(linetype="G36"), fun = function(x) Elfving_Hagglund_1975_initial_basal_area_young_forests_southern_Sweden_Spruce(altitude = 300,
stems = "function" ,
dominant_height = 12.5 ,
broadleaves_percent_of_basal_area = 0,
spatial_distribution = 1 ,
PCT = FALSE,
stand_density = x,
SI = 36,
age_at_breast_height = "function" ,
even_or_somewhat_uneven_aged = TRUE ,
regeneration = "culture"))+
xlim(c(0.4,1))+
scale_y_continuous(limits=c(8,28), breaks = seq(8,28,2))
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Embedding an R snippet on your website
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.