c     ------------------------------------------------------------------
c     file 'c1db2.inc'

c     This common block contains variables representing the acop
c     database properties for each subregion.

c     Parameter include files:  p1werm.inc

c     + + + VARIABLE DECLARATIONS + + +

      real             actopt(mnsub)
      real             actmin(mnsub)
      real             acfdla(mnsub)
      real             acrdla(mnsub)
      real             ac0caf(mnsub)
      real             ac0psf(mnsub)
c      real             ac0alt(mnsub)
      real             ac0pt1(2,mnsub)
      real             ac0pt2(2,mnsub)
      real             ac0fd1(2,mnsub)
      real             ac0fd2(2,mnsub)
      real             ac0ck(mnsub)

      common / c1db2 /
     r                 actopt, actmin, acfdla, acrdla,
c     r                 ac0caf, ac0psf, ac0alt,
     r                 ac0caf, ac0psf,
     r                 ac0pt1, ac0pt2, ac0fd1, ac0fd2, ac0ck

c     + + + VARIABLE DEFINITIONS + + +

c     actopt - Optimal temperature for plant growth (deg C)

c              range values      min        max
c              ------------   ---------  ---------
c              fixed          fmin       fmax
c              typical        tmin       tmax
c              ------------   ---------  ---------

c            - This variable contains the optimal temperature for
c              plant growth for each of the subregions.

c     actmin - Minimum temperature for plant growth (deg C)

c              range values      min        max
c              ------------   ---------  ---------
c              fixed          fmin       fmax
c              typical        tmin       tmax
c              ------------   ---------  ---------

c            - This variable contains the minimum temperature for
c              plant growth for each of the subregions.

c     acfdla - Fraction of growing season when LAI starts declining (?)

c              range values      min        max
c              ------------   ---------  ---------
c              fixed          fmin       fmax
c              typical        tmin       tmax
c              ------------   ---------  ---------
c
c            - This variable contains the fraction of growing
c              season value when LAI begins declining for a crop
c              in each subregion.
c
c     acrdla - LAI decline rate (?)
c
c              range values      min        max
c              ------------   ---------  ---------
c              fixed          fmin       fmax
c              typical        tmin       tmax
c              ------------   ---------  ---------
c
c            - This variable contains the LAI decline rate for a
c              crop in each subregion.
c
c     ac0caf - Critical aeration factor (?)
c
c              range values      min        max
c              ------------   ---------  ---------
c              fixed          fmin       fmax
c              typical        tmin       tmax
c              ------------   ---------  ---------
c
c            - This variable contains the crop critical aeration
c              factor for each of the subregions.
c
c     ac0psf - Pest stress factor (?)
c
c              range values      min        max
c              ------------   ---------  ---------
c              fixed          fmin       fmax
c              typical        tmin       tmax
c              ------------   ---------  ---------
c
c            - This variable contains the crop pest stress
c              factor for each of the subregions.
c
c     ac0alt - Aluminum tolerance index (?)
c
c              range values      min        max
c              ------------   ---------  ---------
c              fixed          fmin       fmax
c              typical        tmin       tmax
c              ------------   ---------  ---------
c
c            - This variable contains the crop aluminum tolerance
c              index for each of the subregions.
c
c     ac0pt1 - xy coordinate for 1st pt on optimal LAI curve
c
c              range values      min        max
c              ------------   ---------  ---------
c              fixed          fmin       fmax
c              typical        tmin       tmax
c              ------------   ---------  ---------
c
c            - This variable contains the (x,y) coordinate for the
c              1st point on the optimal LAI curve for the crop in
c              each subregion.
c
c     ac0pt2 - xy coordinate for 2nd pt on optimal LAI curve
c
c              range values      min        max
c              ------------   ---------  ---------
c              fixed          fmin       fmax
c              typical        tmin       tmax
c              ------------   ---------  ---------
c
c            - This variable contains the (x,y) coordinate for the
c              2nd point on the optimal LAI curve for the crop in
c              each subregion.
c
c     ac0fd1 - xy coordinate for 1st pt on frost damage curve
c
c              range values      min        max
c              ------------   ---------  ---------
c              fixed          fmin       fmax
c              typical        tmin       tmax
c              ------------   ---------  ---------
c
c            - This variable contains the (x,y) coordinate for the
c              1st point on the frost damage curve for the crop in
c              each subregion.
c
c     ac0fd2 - xy coordinate for 2nd pt on frost damage curve
c
c              range values      min        max
c              ------------   ---------  ---------
c              fixed          fmin       fmax
c              typical        tmin       tmax
c              ------------   ---------  ---------

c            - This variable contains the (x,y) coordinate for the
c              2nd point on the frost damage curve for the crop in
c              each subregion.

c     ac0ck  - extinction coefficient

c              range values      min        max
c              ------------   ---------  ---------
c              fixed          fmin       fmax
c              typical          0.0        1.0
c              ------------   ---------  ---------

c            - This variable contains the (extinction coefficient.

c     ------------------------------------------------------------------