NEWS.md

In silviculture: Utility Functions for Forest Inventory and Silviculture

silviculture 0.2.0

This new version brings new naming conventions that will be useful for sorting the package into "modules" of related functions.

• silv_tree_*(): tree-level metrics (although some can be also used as stand-level using the ntrees argument).

• silv_stand_*(): stand or plot-level metrics

• silv_predict_*(): predictions based on models

The old functions are now deprecated and will be eliminated in a future release.

New functions

• silv_density_sdi(): calculates the Stand Density Index

• silv_predict_height(): estimates height from diameter, using the so-called h-d curves. The argument equation allows to choose which equations to use. Currently, only eq_hd_aitor2025() available.

• silv_stand_dominant_diameter(): calculates dominant diameter using two methods:

  • Assman: the mean diameter of the 100 thickest trees per hectare

  • Weise: the quadratic mean diameter of the 20% thickest trees per hectare

• eq_biomass_*(): equations to be used inside the model argument of silv_predict_biomass().

Bug Fixes

• Fix an error with the validator of variable names in silviculture::Inventory S7 class.

• biomass_models: some were failing because the "-" sign was parsed as an em dash.

Enhancements

• Prediction functions (silv_predict_*()) will now have common arguments, and specific arguments that depend of the model used that are specified as a function (e.g. silv_predict_height(model = eq_hd_aitor2025())).

• silv_volume(): it assumed diameter to be in meters. Now the diameter must be given in centimeters. An informing message was added to the function.

• S7 silviculture::Inventory class now stores groups.

Deprecated functions

• silv_diametric_class() deprecated in favour of silv_tree_dclass()

• silv_basal_area() deprecated in favour of silv_tree_basal_area() and silv_stand_basal_area()

• silv_volume() deprecated in favour of silv_tree_volume()

• silv_dominant_height() deprecated in favour of silv_stand_dominant_height()

• silv_lorey_height() deprecated in favour of silv_stand_lorey_height()

• silv_sqrmean_diameter() deprecated in favour of silv_stand_qmean_diameter()

• silv_spacing_index() deprecated in favour of silv_density_hart()

• silv_ntrees_ha() deprecated in favour of silv_density_ntrees_ha()

• silv_biomass() deprecated in favour of silv_predict_biomass()

silviculture 0.1.0

• Initial CRAN submission.

silviculture documentation built on Nov. 5, 2025, 7:13 p.m.