000 00271nam a22001337a 4500
003 OSt
020 _a9780128046913
082 _a630
100 _aSparks Donald L.
245 _aAdvances in Agronomy Vol-140
260 _aAP
650 _aAgronomy
942 _2ddc
_cB
999 _c1992346
_d1992346