c    file: csoil.inc

c     This file contains the declaration of the common block of variables
c     related to initial values of soil N&P, rootzone parameters, etc.
c     note: cn,cp are new variables added. They replace the variables
c     wno3,ap at the initial stage(units of t/g). Variables wno3 and ap are now
c     reserved for values of total no3_n and labile P (units of kg/ha).

c     Parameter include files:  p1werm.inc

c     + + + VARIABLE DECLARATIONS + + +
      real cnt,cpt,cdg,cn,cp,fc,gsw,
     1 pdsw,po,psp,rq,rz,st,suno3,sut,sws,t,wt,za

      integer ids

      common / csoil /
     r                cnt,
     r                cpt,
     r                cdg,
     r                cn(mnsz),
     r                cp(mnsz),
     r                fc(mnsz),
     r                gsw,
     r                ids,
     r                pdsw,
     r                po,
     r                psp(mnsz),
     r                rq,
     r                rz,
     r                st(mnsz),
     r                suno3,
     r                sut,
     r                sws,
     r                t(mnsz),
     r                wt(mnsz),
     r                za(mnsz)


c     + + + VARIABLE DEFINITIONS + + +
c     alt - idex of crop toleramce to aluminum saturation (1-5;1=sensitive,
c           5=tolerant)
c     ino3 - amount of no3_n applied (kg/ha)
c     cdg - soil temperature factor for nutrient cycling
c     cec - cation exchange capacity (cmol/kg) --- blank if unknown
c     cn - concentration of soil test N (g/t) --- blank if unknown
c     cp - concentration of soil test N (g/t) --- blank if unknown
c     fc - field capacity water content of layer (mm)
c     gsw - soil water below which germination will not occur (m)
c     ids - soil weathering code
c     pdsw - plant available water at the layer where seed is placed (m)
c     po - soil porosity (mm)
c     psp - fraction of fertilizer P that is labile
c     rq - no3_n lost by pecolation,runoff,lateral flow from top layer (kg/ha)
c     rz - maximum depth of root zone (cm)
c     smb - sum of bases (cmol/kg) --- blank if unknown
c     st - soil water content of layer (mm)
c     sut - soil moisture factor
c     sws - soil water stress factor
c     t - soil temperature at each soil layer (C)
c     wt - weight of soil in a layer (t/ha-mm)
c     za - depth to the middle of a layer (m)