000 00258nam a22001097a 4500
082 _a631.4
_bSPA
100 _aSparks, Donald L
245 _aAdvances in Agronomy Vol 75
_cSparks, Donald L
260 _bAcademic Press
_c2002
300 _a251
942 _cREF
999 _c184823
_d184823