000 00337nam a2200133Ia 4500
008 140205s9999 xx 000 0 und d
082 _a630/SPA
100 _aSparks, Donald L., ed.
245 _aAdvances in agronomy .Vol 51
260 _bAcademic Press, Inc.
_aSan Diego
_c1993
300 _a217
650 _aAgronomy
942 _2ddc
_cBK
999 _c2775
_d2775