000 00570nam a2200193Ia 4500
008 130910s9999 xx 000 0 und d
041 _aeng
082 _221st ed.
_a631.4
_bHAA/N
100 _aEvans, C.E.
245 _aNitrogen and carbon changes in great plains soils as influenced by cropping and soil treatments
_cby H.J. Haas and C.E. Evans
260 _aColorado :
_bUnited States Department of Agriculture ,
_cn. d.
300 _a111 p.
300 _etables
653 _aCarbon
653 _aNitrogen
653 _aSoils
700 _aHaas, H.J.
942 _cEN
_2ddc
999 _c3306
_d3306