Residue removal not working for rotation

[JJguri]

I need to remove 100% of the residues of wheat the day after harvest in a simulation where I have a 2-year rotation maize-wheat for a long period of 30 years. I am applying the following manager to do it but it is not working. It is actually removing 100% of the total surfaceom_wt including the previous surfaceom_wt coming from the maize residue. @peter-devoil or others can hep me with that? .out and .sum files attached. Note: I am not using the rotation manager due to the events (sow an fert dates) change depending on the year. Wheat harvest date is set to 25-Sep for all years.

 <manager name="Residue_removal">
          <ui>
            <category type="category" description="Tillage application details" />
            <surfaceommodule type="modulename" description="Module used to apply the tillage : ">SurfaceOrganicMatter</surfaceommodule>
            <tillage_type type="list" listvalues="user_defined, chisel, disc, planter, burn, burn_90, graze, scarifier, rip, blade, tine" description="Tillage type : ">user_defined</tillage_type>
            <tillage_depth type="text" description="User_defined depth of seedbed preparation (mm) : ">0</tillage_depth>
            <tillage_f_incorp type="text" description="User_defined fraction of surface residues to incorporate (0-1): ">0.8</tillage_f_incorp>
            <date type="text" description="date harvest (dd-mmm)">25-sep</date>
            <crop type="crop" description="crop to be harvested">wheat</crop>
          </ui>
          <script>
            <text>
      ! Initialize variables
      isWheatHarvested = 0  ! Flag to check if wheat was harvested yesterday, assuming 0 is false
      wheatResidueRemoved = 0  ! Flag to check if residue removal has been performed, assuming 0 is false
    </text>
            <event>init</event>
          </script>
          <script>
            <text>
      ! Set the flag if wheat is harvested
      if ([crop].plant_status = 'dead' or today = date('[date]')) then
        isWheatHarvested = 1  ! Set to 1 to represent true
      endif
    </text>
            <event>harvesting</event>
          </script>
          <script>
            <text>
      ! Apply tillage one day after wheat harvest and remove only wheat residues
      if (isWheatHarvested = 1 and wheatResidueRemoved = 0) then
        ! Replace the following line with a valid APSIM tillage command:
        '[surfaceommodule]' tillage type = [tillage_type], f_incorp = 1, tillage_depth = [tillage_depth]
        wheatResidueRemoved = 1  ! Set to 1 to represent true
      endif

      ! Reset the flag after a day has passed
      if (today = date('[date]') + 1) then
        isWheatHarvested = 0  ! Set to 0 to represent false
        wheatResidueRemoved = 0  ! Set to 0 to represent false
      endif
    </text>
            <event>end_of_day</event>
          </script>
        </manager>

BAT_MW_ZT_R050.zip BAT_MW_ZT_R050 Daily.zip

[peter-devoil]

I think the lucerne example might be doing what you want - there's a "remove" argument to the crops harvest message that specifies the amount of biomass to remove (as a fraction). That won't interfere with surface OM, though the amount added to surface OM will be a lot less