si_to_mai_max {ForestElementsR} | R Documentation |
Convert a Standard Site Index Into an maximum MAI Site Index
Description
A less common, but sometimes useful way of site indexing is to give the site
function converts a standard site index into such an maximum mai site index.
Typically, the stand age where the maximum mai is obtained increases from
better to lesser site index classes. See si_to_mai_age
for an
alternative mai based site indexing method.
Usage
si_to_mai_max(si, mai_variable, ytable)
Arguments
si |
Standard site index to be converted, must correspond to the site
index nomenclature of the yield table to be used (param |
mai_variable |
Character, name of the mai_variable to be used. Must be
one if the mai variables listed in the |
ytable |
An object of class |
Value
The requested maximum mai value corresponding to the given standard site index
See Also
Other yield table functions:
fe_yield_table()
,
plot.fe_yield_table()
,
si_to_mai_age()
,
site_index()
,
stocking_level()
,
yield_tables_for_species
,
ytable_age_slice()
,
ytable_lookup()
,
ytable_max_slice()
Examples
mai_var <- "mai_m3_ha_yr" # mai in volume over bark before harvest
si_to_mai_max(2.3, mai_var, fe_ytable_larch_schober_moderate_1946)
si_to_mai_max(0.7, mai_var, fe_ytable_larch_schober_moderate_1946)
si_to_mai_max(2.3, mai_var, fe_ytable_beech_wiedemann_moderate_1931)
si_to_mai_max(0.7, mai_var, fe_ytable_beech_wiedemann_moderate_1931)
mai_var <- "red_mai_m3_ha_yr" # mai in vol. under bark minus harvest losses
si_to_mai_max(2.3, mai_var, fe_ytable_larch_schober_moderate_1946)
si_to_mai_max(0.7, mai_var, fe_ytable_larch_schober_moderate_1946)
si_to_mai_max(2.3, mai_var, fe_ytable_beech_wiedemann_moderate_1931)
si_to_mai_max(0.7, mai_var, fe_ytable_beech_wiedemann_moderate_1931)