共 9 条
[1]
CLARK RB, 1970, 181 OH AGR RES DEV C
[2]
GORSLINE GW, 1965, 725 PENN STAT AGR EX
[4]
HANWAY JJ, 1962, AGRON J, V54, P217, DOI 10.2134/agronj1962.00021962005400030011x
[5]
JONES JB, 1967, 68 JARR ASH CO REPR
[6]
KIESSELBACH TA, 1950, 166 NEBR AGR EXPT ST
[9]
TUKEY H. B., 1959, ATOMPRAXIS, V5, P213