i.biomass - Computes biomass growth, precursor of crop yield calculation.

       Yann Chemin, Bec de Mortagne, France

i.biomass calculates the biomass growth for a day after [1][2].  Input:

           •   fPAR, the modified Photosynthetic Active Radiation for crops.

           •   Light Use Efficiency [0.0-1.0], in Uzbekistan cotton is at 1.9 most of the time.

           •   Latitude [0.0-90.0], from r.latlong.

           •   DOY [1-366].

           •   Transmissivity of the atmosphere single-way [0.0-1.0], mostly around 0.7+ in clear sky.

           •   Water availability [0.0-1.0], possibly using direct output from i.eb.evapfr.

       imagery, biomass, FPAR, yield

i.biomass  - Computes biomass growth, precursor of crop yield calculation.

i.biomass can use the output of i.eb.evapfr directly as water availability input.

       [1] Bastiaanssen, W.G.M., Ali,  S.,  2002.  A  new  crop  yield  forecasting  model  based  on  satellite
       measurements  applied  across  the  Indus  Basin,  Pakistan.  Agriculture,  Ecosystems  and  Environment,
       94(3):321-340. (PDF)

       [2] Chemin, Y., Platonov, A.,  Abdullaev,  I.,  Ul-Hassan,  M.  2005.   Supplementing  farm  level  water
       productivity assessment by remote sensing in transition economies. Water International. 30(4):513-521.

i.eb.evapfr,r.latlong,r.sun

       Available at: i.biomass source code (history)

       Accessed: Friday Apr 04 01:20:46 2025

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       © 2003-2025 GRASS Development Team, GRASS GIS 8.4.1 Reference Manual

GRASS 8.4.1                                                                                    i.biomass(1grass)

i.biomassi.biomass--helpi.biomassfpar=namelightuse_efficiency=namelatitude=namedayofyear=nametransmissivity_singleway=namewater_availability=nameoutput=name  [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]

   Flags:--overwrite
           Allow output files to overwrite existing files

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:fpar=name[required]
           Name of fPAR raster map

       lightuse_efficiency=name[required]
           Name of light use efficiency raster map (UZB:cotton=1.9)

       latitude=name[required]
           Name of degree latitude raster map [dd.ddd]

       dayofyear=name[required]
           Name of Day of Year raster map [1-366]

       transmissivity_singleway=name[required]
           Name of single-way transmissivity raster map [0.0-1.0]

       water_availability=name[required]
           Value of water availability raster map [0.0-1.0]

       output=name[required]
           Name for output daily biomass growth raster map [kg/ha/d]

       Remove Latitude, DOY and Tsw from input and replace with a raster input compatible with r.sun output.