subroutine mgt_harvgrain (jj, iplant, iharvop) !! ~ ~ ~ PURPOSE ~ ~ ~ !! this subroutine performs the harvest grain only operation !! ~ ~ ~ INCOMING VARIABLES ~ ~ ~ !! name |units |definition !! ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ !! ~ ~ ~ OUTGOING VARIABLES ~ ~ ~ !! name |units |definition !! ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ use basin_module use hru_module, only : ipl use plant_module use plant_data_module use mgt_operations_module use carbon_module use organic_mineral_mass_module use constituent_mass_module implicit none integer :: j = 0 !none |HRU number integer :: k = 0 !none |pesticide number integer, intent (in) :: jj !none |hru number integer, intent (in) :: iplant ! |plant number from plant community integer, intent (in) :: iharvop ! |harvest operation type real :: harveff = 0. !0-1 |harvest efficiency integer :: idp = 0 !none |plant number from plants.plt real :: harveff1 = 0. !0-1 |1.-harveff real :: yld_rto = 0. !0-1 |yield to total biomass ratio real :: yldpst = 0. !kg pst/ha |pesticide removed in yield j = jj ipl = iplant idp = pcom(j)%plcur(ipl)%idplt harveff = harvop_db(iharvop)%eff !! check for minimum harvest index pcom(j)%plcur(ipl)%harv_idx = max (pcom(j)%plcur(ipl)%harv_idx, pldb(idp)%wsyf) !! remove seed mass from total plant mass and calculate yield pl_mass(j)%tot(ipl) = pl_mass(j)%tot(ipl) - pl_mass(j)%seed(ipl) pl_mass(j)%ab_gr(ipl) = pl_mass(j)%ab_gr(ipl) - pl_mass(j)%seed(ipl) pl_yield = harveff * pl_mass(j)%seed(ipl) !! apply pest stress to harvest index - mass lost due to pests - don't add to residue pl_yield = (1. - pcom(j)%plcur(ipl)%pest_stress) * pl_yield !! add plant carbon for printing hpc_d(j)%harv_c = hpc_d(j)%harv_c + pl_yield%c !! add seed mass from harveff to slow humus pool of soil - to preserve balances harveff1 = 1. - harveff soil1(j)%hact(1) = harveff1 * pl_mass(j)%seed(ipl) + soil1(j)%hact(1) !! zero seed mass pl_mass(j)%seed(ipl) = plt_mass_z !! adjust foliar and internal pesticide for grain removal do k = 1, cs_db%num_pests !! calculate amount of pesticide removed with yield yld_rto = pl_yield%m / pl_mass(j)%tot(ipl)%m yldpst = yld_rto * (cs_pl(j)%pl_in(ipl)%pest(k) + cs_pl(j)%pl_on(ipl)%pest(k)) cs_pl(j)%pl_in(ipl)%pest(k) = cs_pl(j)%pl_in(ipl)%pest(k) - (1. - yld_rto) * & cs_pl(j)%pl_in(ipl)%pest(k) cs_pl(j)%pl_in(ipl)%pest(k) = Max (0., cs_pl(j)%pl_in(ipl)%pest(k)) cs_pl(j)%pl_on(ipl)%pest(k) = cs_pl(j)%pl_on(ipl)%pest(k) - (1. - yld_rto) * & cs_pl(j)%pl_on(ipl)%pest(k) cs_pl(j)%pl_on(ipl)%pest(k) = Max (0., cs_pl(j)%pl_on(ipl)%pest(k)) end do return end subroutine mgt_harvgrain