00402nam a22001577a 4500003000400000005001700004008004100021020001900062040002900081050002400110100001800134245003300152250001100185260003900196300000900235OSt20240702155413.0240702b        |||||||| |||| 00| 0 eng d  a978140510859 1  cChuka university library  aSB 112.5b.H39 2006  aPorter John R  aThe physiology of crop yield  a2nd ed  aoxfordbBlackwell publishingc2006  a314p