000			00327nam a22001337a 4500
003			OSt
008			240110b |||||||| |||| 00| 0 eng d
082			_aR631.8 _bF60M
100			_aF.A.O
245			_aMaximizing the efficiency of fertilizer use by grain crops
260			_aRome _bF.A.O _c1980
300			_a30
942			_2ddc _cBK
999			_c35866 _d35866