00639     2200193   4500001002100000008004100021035002000062245012700082100001700209260002600226300005300252084002400305082001700329650002200346650002100368650002100389650001900410990001600429INLIS000000000038342                                   Ind    a0010-0119003255  aModelling minimum residue thresholds for soil conservation benefits in tropical, semi-arid cropping systemscPROBERT, M.E.  aM.E. Probert  aCanberrabACIARc2007  a34 p. : ill. ; 24 cm.--c34 p. : ill. ; 24 cm.--  aSr. 631.6.02:631.45  aSr. 631.6.02  aSOIL CONSERVATION  aRESIDUAL EFFECTS  aCROPPING SYSTEMS  aSOIL FERTILITY  a493/MS/2007