Shredder, flail or rotary O 02 op_notes2 Rotary mower or flail shredder used to defoliate root crops such as sugarbeets before harvest or on cotton or other crop residue where crop has been previously harvested and residue is shredded and spread flat.. 10/3/01 DTL 11/15/01 RUSLE MAS 10-27-06 G 02 gbioarea 1.0 P 31 kilflag 2 P 32 cutflag 0 cutvalh 100.0 cyldrmh 0.0 cplrmh 0.0 cstrmh 0.0 P 40 P 24 fbioflagvt 0 massflatvt1 0.4 massflatvt2 0.3 massflatvt3 0.2 massflatvt4 0.15 massflatvt5 1