HUGIN_Thinning_Guide_Sweden: Thinning Recommendations according to the HUGIN Forest model.

In Silviculturalist/forester: Forest Science and Forestry

Thinning Recommendations according to the HUGIN Forest model.

Description

Thinning Recommendations according to the HUGIN Forest model.

Usage

HUGIN_Thinning_Guide_Sweden(dominantHeight, H100, species)

Arguments

dominantHeight	dominant height of the stand (m).
H100	Site Index H100 (m) according to Hägglund 1972, 1973. e.g. [forester::Hagglund_1972_northern_Sweden_Height_trajectories_Spruce], [forester::Hagglund_1973_southern_Sweden_Height_trajectories_Spruce], [forester::Hagglund_1974_Sweden_height_trajectories_Pine]
species	One of "Pinus sylvestris","Picea abies","Pinus contorta", "Quercus robur,"Fagus sylvatica" or "Deciduous".

Details

Based on coefficients used in Heureka StandWise v. 2.19. e.g. 2022-09-17.

OBS! For Quercus robur, Fagus sylvatica and Deciduous, only two limits are available - unknown if these represent the lower or upper limit before and after thinning.

Value

A list of the upper and lower limits for recommended basal area per hectare before and after thinning.

Examples

data.frame(
  dominantHeight=seq(10,36,0.1)
) %>% group_by_all() %>% mutate(
  data=purrr::map(.x=dominantHeight,.f=HUGIN_Thinning_Guide_Sweden,36,"Picea abies")
) %>% unnest_wider(data) %>%
  ggplot(aes(x=dominantHeight))+
  geom_ribbon(aes(ymin=BeforeLowerLimit,ymax=BeforeUpperLimit),alpha=0.5)+
  geom_ribbon(aes(ymin=AfterLowerLimit,ymax=AfterUpperLimit),alpha=0.5)

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