Harvest Tool (combine cutterbar header - fraction crop height cut) O 04 oenergyarea -1 ostir -1 op_notes4 ARS template (tool type) record - filename is: Harvest Tool (combine cutterbar header - fraction crop height cut).oprn This operation record is designed to represent actual field harvesting operations such as removing the grain yield of a crop like wheat with a cutter bar head on a combine. This harvesting operation record defaults to removing all the reproductive component of a crop above the cutting height. Typically this is specified as the "yield" component in the crop record. The cut height is determined based upon a parameter value specified as a fraction of the crop heght. Ttherefore taller crops get harvested at a higher cut height than shorter crops. The non-harvested crop plant material above the specified cut height becomes flat residue. The remaining above ground crop material below the specified cut height becomes standing residue. Given that machinery does not have an unlimited cut height, a second cut height, set as a fixed distance above the ground, brings the maximum cut height down. All material that is cut by this process (after the preceeding cut) is made into residue. Flattening is set to represent the effect of wheel tracks in a non-row crop. Note that the harvested component can be changed from the "reproductive material" to other plant parts, so it can be used for non-grain type harvesting operations as well. Any crops harvested with this operation will default to killing the crop unless the appropriate "kill" process parameter is changed. 200x Created - Fred Fox Oct 31, 2005 Updated notes - Larry Wagner Nov 30, 2005 Updated notes - Fred Fox Detailed info regarding this operation record: This harvest record determines the cut height based upon the height of the crop being harvested. This helps ensure that the crop will be harvested, even if the normal crop height is severely reduced due to water/temperature stress since the crop height will auto-adjust based upon the actual height of the crop each season at harvest time. If one wants a fixed cut height, regardless of the crop height, they should use the "Harvest Template (fixed height cut and remove)" operation. Some standing crop stalks could be flattened during the harvesting process, e.g. by the harvester's tire tracks. Therefore, a flattening process is also a part of this operation record. The default values are set to zero, assuming no flattening of standing stalks are occuring. However, these can be set as necessary for the specific harvesting device used in the operation. The harvesting operation could also have an effect on the "standing stalk" fall rate and fall threshold values. The default "biomass pool" flag parameter is set to "No adjustments applied" so that no "stalk residue decay rate change" will occur. However, this flag value can be changed along with the default parameter values to change the "stalk residue decay processes". op_devnotes4 Enter dev notes here. G 02 gbioarea 1.0 P 31 kilflag 2 P 43 harv_report_flg 1 harv_calib_flg 1 harv_unit_flg 0 mature_warn_flg 1 cutvalf 0.5 cyldrmf 1.0 cplrmf 0.0 cstrmf 0.0 P 42 harv_report_flg 1 harv_calib_flg 1 harv_unit_flg 0 mature_warn_flg 1 cutflag 0 cutvalh 1000.0 cyldrmh 0.0 cplrmh 0.0 cstrmh 0.0 P 34 frselpool 3 ratemultvt1 1.0 ratemultvt2 1.0 ratemultvt3 1.0 ratemultvt4 1.0 ratemultvt5 1.0 threshmultvt1 1.0 threshmultvt2 1.0 threshmultvt3 1.0 threshmultvt4 1.0 threshmultvt5 1.0 P 40 P 24 fbioflagvt 0 massflatvt1 0.0 massflatvt2 0.0 massflatvt3 0.0 massflatvt4 0.0 massflatvt5 0.0