!     ------------------------------------------------------------------
!     file 'c1db4.inc'
!
!     This common block contains variables representing the crop
!     database properties for each subregion.  These variables
!     are used to estimate crop geometric properties.
!
!     Parameter include files:  p1werm.inc
!
!     + + + VARIABLE DECLARATIONS + + +
 
      real             ac0hta(mnsub)
      real             ac0htb(mnsub)
      real             ac0lza(mnsub)
      real             ac0lzb(mnsub)
      real             ac0saa(mnsub)
      real             ac0sab(mnsub)
      real             ac0lia(mnsub)
      real             ac0lib(mnsub)
      real             ac0cca(mnsub)
      real             ac0ccb(mnsub)
 
      common / c1db4 /                                                  &
     &                 ac0hta, ac0htb, ac0lza, ac0lzb, ac0saa, ac0sab,  &
     &                 ac0lia, ac0lib, ac0cca, ac0ccb
 
!     + + + VARIABLE DEFINITIONS + + +
 
!     ac0hta - Height "a" for LAIZ/SAIZ/LAI/canopy estimation (?)
!
!              range values      min        max
!              ------------   ---------  ---------
!              fixed          fmin       fmax
!              typical        tmin       tmax
!              ------------   ---------  ---------
!
!            - This variable is a height parameter coefficient for
!              estimating LAIZ/SAIZ/LAI/canopy for each of the
!              subregions.
!
!
!     ac0htb - Height "b" for LAIZ/SAIZ/LAI/canopy estimation (?)
!
!              range values      min        max
!              ------------   ---------  ---------
!              fixed          fmin       fmax
!              typical        tmin       tmax
!              ------------   ---------  ---------
!
!            - This variable is a height parameter coefficient for
!              estimating LAIZ/SAIZ/LAI/canopy for each of the
!              subregions.
!
!     ac0lza - Leaf area "a" for LAIZ estimation (?)
!
!              range values      min        max
!              ------------   ---------  ---------
!              fixed          fmin       fmax
!              typical        tmin       tmax
!              ------------   ---------  ---------
!
!            - This variable is a leaf area parameter coefficient
!              for estimating LAIZ for each of the subregions.
!
!     ac0lzb - Leaf area "b" for LAIZ estimation (?)
!
!              range values      min        max
!              ------------   ---------  ---------
!              fixed          fmin       fmax
!              typical        tmin       tmax
!              ------------   ---------  ---------
!
!            - This variable is a leaf area parameter coefficient
!              for estimating LAIZ for each of the subregions.
!
!     ac0saa - Stem area "a" for SAIZ estimation (?)
!
!              range values      min        max
!              ------------   ---------  ---------
!              fixed          fmin       fmax
!              typical        tmin       tmax
!              ------------   ---------  ---------
!
!            - This variable is a stem area parameter coefficient
!              for estimating SAIZ for each of the subregions.
!
!     ac0sab - Stem area "b" for SAIZ estimation (?)
!
!              range values      min        max
!              ------------   ---------  ---------
!              fixed          fmin       fmax
!              typical        tmin       tmax
!              ------------   ---------  ---------
!
!            - This variable is a stem area parameter coefficient
!              for estimating SAIZ for each of the subregions.
!
!     ac0lia - Leaf area index "a" for LAI estimation (?)
!
!              range values      min        max
!              ------------   ---------  ---------
!              fixed          fmin       fmax
!              typical        tmin       tmax
!              ------------   ---------  ---------
!
!            - This variable is a leaf area index parameter coefficient
!              for estimating LAI for each of the subregions.
!
!     ac0lib - Leaf area index "b" for LAI estimation (?)
!
!              range values      min        max
!              ------------   ---------  ---------
!              fixed          fmin       fmax
!              typical        tmin       tmax
!              ------------   ---------  ---------
!
!            - This variable is a leaf area index parameter coefficient
!              for estimating LAI for each of the subregions.
!
!     ac0cca - Canopy cover "a" for canopy cover estimation (?)
!
!              range values      min        max
!              ------------   ---------  ---------
!              fixed          fmin       fmax
!              typical        tmin       tmax
!              ------------   ---------  ---------
!
!            - This variable is a canopy cover parameter coefficient
!              for estimating crop canopy cover for each of the
!              subregions.
!
!     ac0ccb - Canopy cover "b" for canopy cover estimation (?)
!
!              range values      min        max
!              ------------   ---------  ---------
!              fixed          fmin       fmax
!              typical        tmin       tmax
!              ------------   ---------  ---------
!
!            - This variable is a canopy cover parameter coefficient
!              for estimating crop canopy cover for each of the
!              subregions.
!
!     ------------------------------------------------------------------