000			00337nam a2200133Ia 4500
008			140205s9999 xx 000 0 und d
082			_a630/SPA
100			_aSparks, Donald L., ed.
245			_aAdvances in agronomy vol. 53
260			_bAcademic Press, Inc. _aSan Diego _c1994
300			_a193
650			_aAgronomy
942			_2ddc _cBK
999			_c2746 _d2746