module mo_indprd

      use shr_kind_mod, only : r8 => shr_kind_r8

      private
      public :: indprd

      contains

      subroutine indprd( class, prod, nprod, y, extfrc, rxt, ncol )

      use chem_mods, only : gas_pcnst, extcnt, rxntot
      use ppgrid, only : pver

      implicit none

!--------------------------------------------------------------------
! ... dummy arguments
!--------------------------------------------------------------------
      integer, intent(in) :: class
      integer, intent(in) :: ncol
      integer, intent(in) :: nprod
      real(r8), intent(in) :: y(ncol,pver,gas_pcnst)
      real(r8), intent(in) :: rxt(ncol,pver,rxntot)
      real(r8), intent(in) :: extfrc(ncol,pver,extcnt)
      real(r8), intent(inout) :: prod(ncol,pver,nprod)

!--------------------------------------------------------------------
! ... "independent" production for Implicit species
!--------------------------------------------------------------------
      if( class == 4 ) then
         prod(:,:,1) =rxt(:,:,2)

         prod(:,:,2) = 0._r8

         prod(:,:,3) = + extfrc(:,:,1)

         prod(:,:,4) = 0._r8

         prod(:,:,5) = 0._r8

         prod(:,:,6) = 0._r8

         prod(:,:,7) = + extfrc(:,:,2)

         prod(:,:,8) = 0._r8

         prod(:,:,9) = 0._r8

         prod(:,:,10) = 0._r8

         prod(:,:,11) = 0._r8

         prod(:,:,12) = 0._r8

         prod(:,:,13) = + extfrc(:,:,4)

         prod(:,:,14) = + extfrc(:,:,3)

         prod(:,:,15) = 0._r8

         prod(:,:,16) = 0._r8

         prod(:,:,17) = 0._r8

         prod(:,:,18) = + extfrc(:,:,5)

         prod(:,:,19) = + extfrc(:,:,6)

         prod(:,:,20) = + extfrc(:,:,7)

         prod(:,:,21) = + extfrc(:,:,8)

         prod(:,:,22) = 0._r8

         prod(:,:,23) = 0._r8

         prod(:,:,24) = 0._r8

         prod(:,:,25) = 0._r8

         prod(:,:,26) = 0._r8

         prod(:,:,27) = 0._r8

         prod(:,:,28) = 0._r8

         prod(:,:,29) = 0._r8

         prod(:,:,30) = 0._r8

         prod(:,:,31) = 0._r8

         prod(:,:,32) = 0._r8

         prod(:,:,33) = 0._r8

         prod(:,:,34) = 0._r8

         prod(:,:,35) = 0._r8

         prod(:,:,36) = 0._r8

         prod(:,:,37) = 0._r8

      end if

      end subroutine indprd

      end module mo_indprd