| Type: | Package |
| Title: | Light Use Efficiency Model to Estimate Biomass and YIELD with and Without Vapour Pressure Deficit |
| Version: | 0.2.1 |
| Depends: | R(≥ 2.10.0) |
| Author: | Maninder Singh Dhillon [aut,cre], Thorsten Dahms [ctb], Leon Nill [ctb] |
| Maintainer: | Maninder Singh Dhillon <manidhillon1989@gmail.com> |
| 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>. |
| License: | GPL-2 |
| Encoding: | UTF-8 |
| LazyData: | true |
| Imports: | raster,ncdf4 |
| RoxygenNote: | 6.0.1 |
| Repository: | CRAN |
| NeedsCompilation: | no |
| Packaged: | 2018-06-14 12:29:08 UTC; s359182 |
| Date/Publication: | 2018-06-14 12:39:16 UTC |
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)
Fpar data
Description
Input datasets
Usage
fpar
Format
A raster (.tif)
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)