module mo_prod_loss

      use shr_kind_mod, only : r8 => shr_kind_r8

      private
      public :: exp_prod_loss
      public :: imp_prod_loss

      contains

      subroutine exp_prod_loss( prod, loss, y, rxt, het_rates )

      use ppgrid, only : pver

      implicit none

!--------------------------------------------------------------------
! ... dummy args
!--------------------------------------------------------------------
      real(r8), dimension(:,:,:), intent(out) :: &
            prod, &
            loss
      real(r8), intent(in) :: y(:,:,:)
      real(r8), intent(in) :: rxt(:,:,:)
      real(r8), intent(in) :: het_rates(:,:,:)



!--------------------------------------------------------------------
! ... loss and production for Explicit method
!--------------------------------------------------------------------


         loss(:,:,1) = ( + het_rates(:,:,21))* y(:,:,21)
         prod(:,:,1) = 0._r8

      end subroutine exp_prod_loss

      subroutine imp_prod_loss( prod, loss, y, rxt, het_rates )

      use ppgrid, only : pver

      implicit none

!--------------------------------------------------------------------
! ... dummy args
!--------------------------------------------------------------------
      real(r8), dimension(:), intent(out) :: &
            prod, &
            loss
      real(r8), intent(in) :: y(:)
      real(r8), intent(in) :: rxt(:)
      real(r8), intent(in) :: het_rates(:)



!--------------------------------------------------------------------
! ... loss and production for Implicit method
!--------------------------------------------------------------------


         loss(1) = ( + rxt(1) + rxt(3) + het_rates(1))* y(1)
         prod(1) = 0._r8
         loss(2) = ( + het_rates(2))* y(2)
         prod(2) =rxt(4)*y(3)
         loss(3) = ( + rxt(4) + het_rates(3))* y(3)
         prod(3) = (rxt(5) +.500_r8*rxt(6) +rxt(7))*y(4)
         loss(4) = ( + rxt(5) + rxt(6) + rxt(7) + het_rates(4))* y(4)
         prod(4) = 0._r8
         loss(5) = ( + het_rates(5))* y(5)
         prod(5) = 0._r8
         loss(6) = ( + het_rates(6))* y(6)
         prod(6) = 0._r8
         loss(7) = ( + het_rates(7))* y(7)
         prod(7) = 0._r8
         loss(8) = ( + het_rates(8))* y(8)
         prod(8) = 0._r8
         loss(9) = ( + het_rates(9))* y(9)
         prod(9) = 0._r8
         loss(10) = ( + het_rates(10))* y(10)
         prod(10) = 0._r8
         loss(11) = ( + het_rates(11))* y(11)
         prod(11) = 0._r8
         loss(12) = ( + het_rates(12))* y(12)
         prod(12) = 0._r8
         loss(13) = ( + het_rates(13))* y(13)
         prod(13) = 0._r8
         loss(14) = ( + het_rates(14))* y(14)
         prod(14) = 0._r8
         loss(15) = ( + het_rates(15))* y(15)
         prod(15) = 0._r8
         loss(16) = ( + het_rates(16))* y(16)
         prod(16) = 0._r8
         loss(17) = ( + het_rates(17))* y(17)
         prod(17) = 0._r8
         loss(18) = ( + het_rates(18))* y(18)
         prod(18) = 0._r8
         loss(19) = ( + het_rates(19))* y(19)
         prod(19) = 0._r8
         loss(20) = ( + het_rates(20))* y(20)
         prod(20) = 0._r8

      end subroutine imp_prod_loss

      end module mo_prod_loss