00383nam a2200121Ia 450000500170000000800410001702000220005805000210008010000200010124500870012126000370020865000160024520251229125057.0251229s9999    xx            000 0 und d  a978-0-13-022133-9  aSB 185 .A27 2005  aAcquaah, George 0aPrinciples of crop productionb theory, techniques, and technologycGeorge Acquaah  aNew Jerseyb Prentice Hallc2005  aField Crops