000 00274nam a2200097Ia 4500
001 MPKV028220
008 120911s9999 xx 000 0 und d
245 _aAgronomy Journal Vol. : 64
_c;
246 _aAgronomy Journal
260 _aWinconsin
_bAmerican society of Agronomy.
_c1972
999 _c26840
_d26840