000			00337nam a2200133Ia 4500
008			140205s9999 xx 000 0 und d
082			_a630/SPA
100			_aSparks, Donald L., ed.
245			_aAdvances in agronomy .Vol 48
260			_bAcademic Press, Inc. _aSan Diego _c1992
300			_a313
650			_aAgronomy
942			_2ddc _cBK
999			_c2772 _d2772