ALS: American Leaf Spot

In VEZY/DynACof: A Process-Based Model to Study Growth, Yield and Ecosystem Services of Coffee Agroforestry Systems

Description

Compute the percentage of Coffea leaves dying from American Leaf Spot disease, drought excluded.

Usage

ALS(
  Elevation,
  SlopeAzimut = 0,
  Slope = 0,
  RowDistance = 1.5,
  Shade = 0,
  CanopyHeight.Coffee = 2,
  Fertilization = 3,
  ShadeType = 5,
  CoffeePruning = c("tree", "row", "block", NULL),
  df_rain
)

Arguments

Elevation	Site elevation (m.a.s.l)
SlopeAzimut	Slope azimuth (degree)
Slope	Slope percentage (\%)
RowDistance	Coffee rows distance (m)
Shade	Shade percentage (\%)
CanopyHeight.Coffee	Coffee Height (m)
Fertilization	N fertilization per year
ShadeType	Shade type: 1 Legume only 2 Bananas and legume 3 Bananas and other plants 4 Fruit and forest trees only 5 No shade (Full sun)
CoffeePruning	Character specifying the pruning management. Values: tree, row, block or NULL.
df_rain	Data frame with DOY, year and Rain (mm) values

Value

ALS	Percentage of dead leaves by ALS by day (\% day^{-1})

Note

It is good practice to use shade tree transmittance to compute Shade percentage (Shade= 1-Transmittance).

References

Avelino et al. (2007) Topography and Crop Management Are Key Factors for the Development of American Leaf Spot Epidemics on Coffee in Costa Rica File: "Ia_digitized from Avelino 2007 - JA_lineaire.xlsx"

Examples

# df_rain has this structure :
df_rain= data.frame(DOY= 1:365, year= rep(2018,365), Rain= rnorm(n = 365,mean = 5, sd = 1))
ALS(Elevation = 1000, df_rain= df_rain)

VEZY/DynACof documentation built on Feb. 3, 2021, 8:52 p.m.