000 00309nam a2200121Ia 4500
008 170101s2006 xx 000 0 und d
082 _a630 SPA
100 _aSparks D. L.
245 0 _aAdvances in Agronomy Vol.89
260 _aLondon
_bElsevier Academic Press
_c2006
300 _a344 p.
942 _2ddc
_cB
999 _c1305916
_d1305916