000 00268nam a2200097Ia 4500
100 _aSmaling E.M.A.
250 _a1st
020 _a978-93-81450-50-5
245 _aNutrient disequilibria in agroecosystems concepts and case studies
260 _bCABI Publishing, Wallingford
_c1999
082 _a631SMA
999 _c336165
_d336165