Pukkala_2009_diameter_increment_Finland_Pine: Diameter Increment for Uneven-sized Spruce forests in Finland...

In Silviculturalist/forester: Forest Science and Forestry

Diameter Increment for Uneven-sized Spruce forests in Finland from Pukkala 2009

Description

Diameter Increment for Uneven-sized Spruce forests in Finland from Pukkala 2009

Usage

Pukkala_2009_diameter_increment_Finland_Pine(
  BAL_Spruce,
  BAL_other,
  BA,
  diameter_cm,
  vegetation,
  temperature_sum
)

Pukkala_2009_diameter_increment_Finland_Spruce(
  BAL_Spruce,
  BAL_other,
  BA,
  diameter_cm,
  vegetation,
  temperature_sum
)

Pukkala_2009_diameter_increment_Finland_Betula(
  BAL_Spruce,
  BAL_other,
  BA,
  diameter_cm,
  vegetation,
  temperature_sum
)

Arguments

BAL_Spruce	Basal area of Spruce trees larger than the subject tree (m2 / ha)
BAL_other	Basal area of trees other than Spruce larger than the subject tree (m2/ha)
BA	Basal Area of all trees larger than 5 cm dbh. m2/ha.
diameter_cm	Diameter of subject tree at breast height 1.3m, cm.
vegetation	One of Finland_vegetation_types()
temperature_sum	Degree days

Details

Pine model is based on 15282 trees. R^2 = 0.4, SD of resid.= 0.527. Snowdon correction = 1.110

Spruce model is based on 24014 trees. R^2 = 0.568, SD of resid.= 0.604. Snowdon correction = 1.124

@details Betula model is based on 8219 trees. R^2 = 0.541, SD of resid.= 0.599. Snowdon correction = 1.127

Value

5 year over-bark diameter increment.

Source

Pukkala, T., Lähde, E., Laiho, O. (2009). Growth and Yield Models of uneven-sized forest stands in Finland. For. Ecol. Manage. 258: 207-216. Available (25/12/2021) https://doi.org/10.1016/j.foreco.2009.03.052

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