NHAmodule: Projects number of trees (N) from stand-level parameters to...

Description Usage Arguments Value Author(s) References Examples

View source: R/NHA_module.R

Description

Evaluates stand-level input variables to project number of trees per hectare to the following year. This is a mortality model, as it does not incorporate ingrowth.

Usage

1
NHAmodule(NHA0 = NA, QD0 = NA, DOM.SP = 4, model = 3, return.DQmax = FALSE)

Arguments

NHA0

Number of trees (trees/ha) of the stand at current time 0

QD0

Quadratic diameter (cm) of the stand at current time 0

DOM.SP

Dominant specie (1:Rauli, 2:Roble, 3:Coigue, 4:Others or Mixed)

model

Number of fitted model for N estimation (1:Original Reineke, 2:Re-fitted Reineke, 3:Reineke with correction factor) (default = 3)

return.DQmax

If true returns DQ maximum from Reineke's model (default = FALSE)

Value

Number of trees (N1, m2/ha) for the next year (i.e. time 1)

Author(s)

S.A. Gezan, S. Palmas and P. Moreno

References

Gezan, S.A. and Ortega, A. (2001). Desarrollo de un Simulador de Rendimiento para Renovales de Roble, Rauli y Coigue. Reporte Interno. Projecto FONDEF D97I1065. Chile

Gezan, S.A., Ortega, A., Andenmatten, E. (2007). Diagramas de manejo de densidad para renovales de roble, rauli y coigue en chile. Bosque (Valdivia) 28, 97-105

Examples

1
2
3
# Example: Number of trees for next year with current NHA0
(N1 <- NHAmodule(NHA0=2730, QD0=12.43, model=1))
(N1 <- NHAmodule(NHA0=2730, QD0=12.43, model=2))

sgezan/Nothopack documentation built on April 25, 2021, 8:03 a.m.