000 00306nam a2200121Ia 4500
008 161121s9999 xx 000 0 und d
100 _aJENKINSON (D S) ; SMITH (K A)
245 0 _aNitrogen efficiency in agricultural soi
260 _cElsevier Applied Sci.
365 _b0
650 _aNIL
942 _cBK
999 _c95311
_d95311