000 00313 am a2200121 a 4500
100 1 _aThrockmorton, R.I., Duley, F.L.
245 1 _aSoil fertility
260 _aTopeka
_c1932
300 _a1-60 p.
942 _2udc
_cB
440 _aSoil Kansas Agricultural Experiment Station. Bulletin No. 260
901 _aS51785
999 _c109470
_d109470