000 00537nam a2200157Ia 4500
008 140208s9999 xx 000 0 und d
020 _a9780851983400
044 _aUnited Kingdom
080 _a631.84 R561SO
100 _aRobinson, J.B.D.
245 _aSoil nitrogen, index and its calibration with crop performance to improve fertilizer efficiency on arable soils
_cJ.B.D. Robinson
260 _bCommonwealth Agricultural Bureaux
_aLondon
_c1975
300 _a53 p.; 25cm.
490 _a(Special publication; no. 1)
942 _2udc
_cGB
999 _c7216
_d7216