Pukkala_2009_ingrowth_Finland_Spruce: Ingrowth model for Uneven-sized stands in Finland

In Silviculturalist/forester: Forest Science and Forestry

Ingrowth model for Uneven-sized stands in Finland

Description

Baskerville Correction has been added to the constant.

Usage

Pukkala_2009_ingrowth_Finland_Spruce(
  stems_ha_spruce,
  stems_ha_other,
  vegetation,
  BA
)

Pukkala_2009_ingrowth_Finland_Betula_Pine(
  stems_ha_spruce,
  stems_ha_other,
  vegetation,
  BA
)

Arguments

stems_ha_spruce	Spruce stems per hectare >5 cm dbh.
stems_ha_other	Stems other than Spruce per hectare > 5 cm dbh.
vegetation	One of [forester::Finland_vegetation_types()]
BA	Total Basal Area (m2/ha) of trees >5 cm dbh.

Details

The Spruce model is based on 10545 living trees, 1127 dead trees. Best threshold probability is c. 0.5-0.6. Percentage of correct predictions 90.7.

Betula and Pine model is based on 3230 living trees, 289 dead trees. Best threshold probability = 0.6. Percentage of correct predictions = 92.6

Value

Number of ingrowth per hectare.

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.