00494    a2200157   4500020001500000082001600015100002600031245007700057260004400134300001600178650003100194650003500225700002400260700002600284700002600310  a0643058419  a631.58bCON  aCarberry, P. S. eed.  aConservation tillage and ley farming systems for the semi- arid tropics   aAustraliabCSIRO Publishingc1996g1996  a173p.c27cm  aCULTIVATION AND HARVESTING  aSPECIAL METHODS OF CULTIVATION  aMuir, L. L. eed.    aChapman, A. L.  eed.  aAnderson, C. A. eed.