共 10 条
[1]
BAL B. S., 1959, AGRON JOUR, V51, P555
[2]
FREY K. J., 1962, PROC IOWA ACAD SCI, V69, P165
[4]
GARDNER C. O., 1961, CROP SCI, V1, P241, DOI 10.2135/cropsci1961.0011183X000100040004x
[6]
JOHNSON GR, 1965, THESIS IOWA STATE U
[7]
MURPHY CHARLES F, 1962, CROP SCI, V2, P509, DOI 10.2135/cropsci1962.0011183X000200060021x
[8]
REYES R, 1965, THESIS IOWA STATE U
[10]
TIYAWALEE D, 1967, THESIS IOWA STAT U