000			00364nam a2200157Ia 4500
020			_a0125482809
082			_a629/PEA
100			_aPearson, C.J., ed.
245			_aControl of crop productivity
260			_bAcademic Press _aSydney _c1984
300			_a315
650			_aAgricultural productivity
650			_aCrop yields
901			_a2345
942			_2ddc _cBK
999			_c2063 _d2063