000 00271 a2200109 4500
080 _a631.811.6
_bB 512 M
245 1 _aMagnesium for a full harvest
_cby F.W. Berk, et. al.
260 _aNew York
650 _aMagnesium Requirement
100 1 _aBerk, F.W.
_d
901 _a1277
999 _c45483
_d45483