subroutine mgt_harvbiomass (jj, iplant, iharvop) !! ~ ~ ~ PURPOSE ~ ~ ~ !! this subroutine performs the harvest operation for above ground biomass (no kill) use organic_mineral_mass_module use soil_module use plant_module use plant_data_module use mgt_operations_module use constituent_mass_module use carbon_module implicit none integer :: j = 0 !none |HRU number integer :: k = 0 !none |pesticide counter integer :: idp = 0 ! | integer, intent (in) :: jj !none |counter integer, intent (in) :: iplant ! |plant number xwalked from hlt_db()%plant and plants.plt integer, intent (in) :: iharvop ! |harvest operation type integer :: ipl = 0 !none |counter real :: clippst = 0. !kg pst/ha |pesticide in clippings real :: yldpst = 0. !kg pst/ha |pesticide removed in yield real :: hi_tot = 0. !kg/ha)/(kg/ha) |total harvest index = hi_ovr * harveff real :: hi_ovr = 0. !kg/ha)/(kg/ha) |harvest index target specified at harvest real :: harveff = 0. !0-1 |harvest efficiency real :: clip = 0. !0-1 |1.-harveff real :: yld_rto = 0. !0-1 |yield to total biomass ratio j = jj ipl = iplant idp = pcom(j)%plcur(ipl)%idplt hi_ovr = harvop_db(iharvop)%hi_ovr harveff = harvop_db(iharvop)%eff !! remove yield from seed, leaf, and stem - using hi_ovr for all parts hi_tot = hi_ovr * harveff harv_seed = hi_tot * pl_mass(j)%seed(ipl) harv_leaf = hi_tot * pl_mass(j)%leaf(ipl) harv_stem = hi_tot * pl_mass(j)%stem(ipl) pl_yield = harv_seed + harv_leaf pl_yield = pl_yield + harv_stem !! 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 hrc_d(j)%plant_c = hrc_d(j)%plant_c + pl_yield%c hpc_d(j)%drop_c = hpc_d(j)%drop_c + pl_yield%c !! adjust foliar and internal pesticide for plant removal do k = 1, cs_db%num_pests !! calculate amount of pesticide removed with yield and clippings yld_rto = (hi_tot * pl_mass(j)%ab_gr(ipl)%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)) clippst = (1. - harveff) * (cs_pl(j)%pl_in(ipl)%pest(k) + cs_pl(j)%pl_on(ipl)%pest(k)) if (clippst < 0.) clippst = 0. !! add pesticide in clippings to soil surface cs_soil(j)%ly(1)%pest(k) = cs_soil(j)%ly(1)%pest(k) + clippst end do !! update remaining plant organic pools pl_mass(j)%seed(ipl) = pl_mass(j)%seed(ipl) - harv_seed pl_mass(j)%leaf(ipl) = pl_mass(j)%leaf(ipl) - harv_leaf pl_mass(j)%stem(ipl) = pl_mass(j)%stem(ipl) - harv_stem pl_mass(j)%tot(ipl) = pl_mass(j)%tot(ipl) - pl_yield pl_mass(j)%ab_gr(ipl) = pl_mass(j)%ab_gr(ipl) - pl_yield !! add clippings (biomass left behind) to slow humus pool of soil clip = 1. - harveff harv_left = clip * pl_yield rsd1(j)%tot(1) = harv_left + rsd1(j)%tot(1) !! calculation for dead roots allocations, resetting phenology, updating other pools !! reset leaf area index and fraction of growing season if (pl_mass(j)%tot(ipl)%m > 0.001) then !! assume the lai biomass relationship - 0.5 lai decline for biomass removal pcom(j)%plg(ipl)%lai = pcom(j)%plg(ipl)%lai * (1. - 0.5 * hi_tot) pcom(j)%plcur(ipl)%phuacc = pcom(j)%plcur(ipl)%phuacc * (1. - 0.5 * hi_tot) pcom(j)%plg(ipl)%root_frac = pl_mass(j)%root(ipl)%m / pl_mass(j)%tot(ipl)%m else pl_mass(j)%tot(ipl)%m = 0. pcom(j)%plg(ipl)%lai = 0. pcom(j)%plcur(ipl)%phuacc = 0. end if return end subroutine mgt_harvbiomass