Package 'lue'

Title: Light Use Efficiency Model to Estimate Biomass and YIELD with and Without Vapour Pressure Deficit
Description: Contains LUE_BIOMASS(),LUE_BIOMASS_VPD(), LUE_YIELD() and LUE_YIELD_VPD() to estimate aboveground biomass and crop yield firstly by calculating the Absorbed Photosynthetically Active Radiation (APAR) and secondly the actual values of light use efficiency with and without vapour presure deficit Shi et al.(2007) <doi:10.2134/agronj2006.0260>.
Authors: Maninder Singh Dhillon [aut,cre], Thorsten Dahms [ctb], Leon Nill [ctb]
Maintainer: Maninder Singh Dhillon <[email protected]>
License: GPL-2
Version: 0.2.1
Built: 2025-02-25 06:01:35 UTC
Source: https://github.com/cran/lue

Help Index

Fpar data

Description

Input datasets

Usage

fpar

Format

A raster (.tif)

Light Use Efficiency Model to Estimate Biomass

Description

Contains LUE_BIOMASS() to estimate aboveground biomass firstly by calculating the Absorbed Photosynthetically Active Radiation (APAR) and secondly the actual values of light use efficiency Shi et al.(2007) <doi:10.2134/agronj2006.0260>.

Usage

LUE_BIOMASS(fpar_raster,par,tmin,tmin_min,tmin_max,LUE_optimal)

Arguments

fpar_raster

fraction of photosynthetically active radiation (fpar) per day raster with .tif format
par

clear sky surface photosynthetically active radiation (par) per day raster with .nc file format.
tmin

Minimum temperature at 2 metres since previous post-processing per day raster with .nc file format.
tmin_min

minimum value of tmin used for the threshold
tmin_max

maximum value of tmin used for the threshold
LUE_optimal

optical lue value with respect to crop type for example wheat crop LUE_optimal is 3.0 (Djumaniyazova et al., 2010)

Format

A Biomass raster

Value

Biomass raster

References

Djumaniyazova Y, Sommer R, Ibragimov N, Ruzimov J, Lamers J & Vlek P (2010) Simulating water use and N response of winter wheat in the irrigated floodplains of Northwest Uzbekistan. Field Crops Research 116, 239-251.

Shi Z, Ruecker G R,Mueller M, Conrad C, Ibragimov N, Lamers J P A, Martius C, Strunz G, Dech S & Vlek P L G (2007) Modeling of Cotton Yields in the Amu Darya River Floodplains of Uzbekistan Integrating Multitemporal Remote Sensing and Minimum Field Data. Agronomy Journal 99, 1317-1326.

Examples

## Not run: 
## load the data
data(fpar)
data(par1)
data(tmin)
LUE_BIOMASS(fpar,par1,tmin,-2,12,3)

## End(Not run)
library(raster)
fparr <- raster(nc=2, nr=2)
values(fparr)<-runif(ncell(fparr),min =0.2,max= 0.8)
par11<- brick(nc=2, nr=2, nl=2)
values(par11)<-runif(ncell(par11),min =169076.9,max= 924474.6)
tminn <- brick(nc=2, nr=2, nl=2)
values(tminn)<-runif(ncell(tminn),min = 278,max= 281)
LUE_BIOMASS(fparr,par11,tminn,-2,12,3)

Light Use Efficiency Model to Estimate Biomass with Vapour Pressure Deficit

Description

LUE_BIOMASS_VPD() to estimate aboveground biomass firstly by calculating the Absorbed Photosynthetically Active Radiation (APAR) and secondly the actual values of light use efficiency by including vapour pressure deficit of the crops Shi et al.(2007) <doi:10.2134/agronj2006.0260>.

Usage

LUE_BIOMASS_VPD(fpar_raster,par,tmin,tmax,tdew,
tmin_min,tmin_max,vpd_max, vpd_min,LUE_optimal)

Arguments

fpar_raster

fraction of photosynthetically active radiation (fpar) per day raster with .tif format
par

clear sky surface photosynthetically active radiation (par) per day raster with .nc file format.
tmin

Minimum temperature at 2 metres since previous post-processing per day raster with .nc file format.
tmax

Maximum temperature at 2 metres since previous post-processing per day raster with .nc file format.
tdew

Dewpoint temperature at 2 metres since previous post-processing per day raster with .nc file format.
tmin_min

minimum value of tmin used for the threshold
tmin_max

maximum value of tmin used for the threshold
vpd_max

maximum value of vapour pressure deficit used for the threshold
vpd_min

minimum value of vapour pressure deficit used for the threshold
LUE_optimal

optical lue value with respect to crop type for example wheat crop LUE_optimal is 3.0 (Djumaniyazova et al., 2010)

Format

A Biomass raster

Value

Biomass raster

References

Djumaniyazova Y, Sommer R, Ibragimov N, Ruzimov J, Lamers J & Vlek P (2010) Simulating water use and N response of winter wheat in the irrigated floodplains of Northwest Uzbekistan. Field Crops Research 116, 239-251.

Shi Z, Ruecker G R,Mueller M, Conrad C, Ibragimov N, Lamers J P A, Martius C, Strunz G, Dech S & Vlek P L G (2007) Modeling of Cotton Yields in the Amu Darya River Floodplains of Uzbekistan Integrating Multitemporal Remote Sensing and Minimum Field Data. Agronomy Journal 99, 1317-1326.

Examples

## Not run: 
## load the data
data(fpar)
data(par1)
data(tmin)
data(tmax)
data(tdew)
LUE_BIOMASS_VPD(fpar,par1,tmin,tmax,tdew,-2,12,1.5,4,3)

## End(Not run)
library(raster)
fparr <- raster(nc=2, nr=2)
values(fparr)<-runif(ncell(fparr),min =0.2,max= 0.8)
par11<- brick(nc=2, nr=2, nl=2)
values(par11)<-runif(ncell(par11),min =169076.9,max= 924474.6)
tminn <- brick(nc=2, nr=2, nl=2)
values(tminn)<-runif(ncell(tminn),min = 278,max= 281)
tmaxx <- brick(nc=2, nr=2, nl=2)
values(tmaxx)<-runif(ncell(tmaxx),min = 278,max= 281)
tdeww <- brick(nc=2, nr=2, nl=2)
values(tdeww)<-runif(ncell(tdeww),min = 278,max= 281)
LUE_BIOMASS_VPD(fparr,par11,tminn,tmaxx,tdeww,-2,12,1.5,4,3)

Light Use Efficiency Model to Estimate Crop Yield

Description

Contains LUE_YIELD() to estimate aboveground biomass firstly by calculating the Absorbed Photosynthetically Active Radiation (APAR) and secondly the actual values of light use efficiency Shi et al.(2007) <doi:10.2134/agronj2006.0260>.

Usage

LUE_YIELD(fpar_raster,par,tmin,tmin_min,tmin_max,LUE_optimal)

Arguments

fpar_raster

fraction of photosynthetically active radiation (fpar) per day raster with .tif format
par

clear sky surface photosynthetically active radiation (par) per day raster with .nc file format.
tmin

Minimum temperature at 2 metres since previous post-processing per day raster with .nc file format.
tmin_min

minimum value of tmin used for the threshold
tmin_max

maximum value of tmin used for the threshold
LUE_optimal

optical lue value with respect to crop type for example wheat crop LUE_optimal is 3.0 (Djumaniyazova et al., 2010)

Format

A Biomass raster

Value

Yield raster

References

Djumaniyazova Y, Sommer R, Ibragimov N, Ruzimov J, Lamers J & Vlek P (2010) Simulating water use and N response of winter wheat in the irrigated floodplains of Northwest Uzbekistan. Field Crops Research 116, 239-251.

Shi Z, Ruecker G R,Mueller M, Conrad C, Ibragimov N, Lamers J P A, Martius C, Strunz G, Dech S & Vlek P L G (2007) Modeling of Cotton Yields in the Amu Darya River Floodplains of Uzbekistan Integrating Multitemporal Remote Sensing and Minimum Field Data. Agronomy Journal 99, 1317-1326.

Examples

## Not run: 
## load the data
data(fpar)
data(par1)
data(tmin)
LUE_YIELD(fpar,par1,tmin,-2,12,3)

## End(Not run)
library(raster)
fparr <- raster(nc=2, nr=2)
values(fparr)<-runif(ncell(fparr),min =0.2,max= 0.8)
par11<- brick(nc=2, nr=2, nl=2)
values(par11)<-runif(ncell(par11),min =169076.9,max= 924474.6)
tminn <- brick(nc=2, nr=2, nl=2)
values(tminn)<-runif(ncell(tminn),min = 278,max= 281)
LUE_YIELD(fparr,par11,tminn,-2,12,3)

Light Use Efficiency Model to Estimate Crop Yield with Vapour Pressure Deficit

Description

LUE_YIELD_VPD() to estimate crop yield firstly by calculating the Absorbed Photosynthetically Active Radiation (APAR) and secondly the actual values of light use efficiency by including vapour pressure deficit of the crops Shi et al.(2007) <doi:10.2134/agronj2006.0260>.

Usage

LUE_YIELD_VPD(fpar_raster,par,tmin,tmax,tdew,
tmin_min,tmin_max,vpd_max, vpd_min,LUE_optimal)

Arguments

fpar_raster

fraction of photosynthetically active radiation (fpar) per day raster with .tif format
par

clear sky surface photosynthetically active radiation (par) per day raster with .nc file format.
tmin

Minimum temperature at 2 metres since previous post-processing per day raster with .nc file format.
tmax

Maximum temperature at 2 metres since previous post-processing per day raster with .nc file format.
tdew

Dewpoint temperature at 2 metres since previous post-processing per day raster with .nc file format.
tmin_min

minimum value of tmin used for the threshold
tmin_max

maximum value of tmin used for the threshold
vpd_max

maximum value of vapour pressure deficit used for the threshold
vpd_min

minimum value of vapour pressure deficit used for the threshold
LUE_optimal

optical lue value with respect to crop type for example wheat crop LUE_optimal is 3.0 (Djumaniyazova et al., 2010)

Format

A Biomass raster

Value

Yield raster

References

Djumaniyazova Y, Sommer R, Ibragimov N, Ruzimov J, Lamers J & Vlek P (2010) Simulating water use and N response of winter wheat in the irrigated floodplains of Northwest Uzbekistan. Field Crops Research 116, 239-251.

Shi Z, Ruecker G R,Mueller M, Conrad C, Ibragimov N, Lamers J P A, Martius C, Strunz G, Dech S & Vlek P L G (2007) Modeling of Cotton Yields in the Amu Darya River Floodplains of Uzbekistan Integrating Multitemporal Remote Sensing and Minimum Field Data. Agronomy Journal 99, 1317-1326.

Examples

## Not run: 
## load the data
data(fpar)
data(par1)
data(tmin)
data(tmax)
data(tdew)
LUE_YIELD_VPD(fpar,par1,tmin,tmax,tdew,-2,12,1.5,4,3)

## End(Not run)
library(raster)
fparr <- raster(nc=2, nr=2)
values(fparr)<-runif(ncell(fparr),min =0.2,max= 0.8)
par11<- brick(nc=2, nr=2, nl=2)
values(par11)<-runif(ncell(par11),min =169076.9,max= 924474.6)
tminn <- brick(nc=2, nr=2, nl=2)
values(tminn)<-runif(ncell(tminn),min = 278,max= 281)
tmaxx <- brick(nc=2, nr=2, nl=2)
values(tmaxx)<-runif(ncell(tmaxx),min = 278,max= 281)
tdeww <- brick(nc=2, nr=2, nl=2)
values(tdeww)<-runif(ncell(tdeww),min = 278,max= 281)
LUE_YIELD_VPD(fparr,par11,tminn,tmaxx,tdeww,-2,12,1.5,4,3)

Photosynthetically Active Radiation

Description

Input par dataset

Usage

par1

Format

A rasterbrick (.nc)

Dewpoint Temperature

Description

Input dewpoint temperature dataset

Usage

tdew

Format

A rasterbrick (.nc)

Maximum temperature data

Description

Input maximum temperature dataset

Usage

tmax

Format

A rasterbrick (.nc)

Minimum temperature data

Description

Input minimum temperature dataset

Usage

tmin

Format

A raster (.nc)