共 13 条
[2]
GREENWOOD H. N., 1958, JOUR ROY AGRIC SOC ENGLAND, V119, P52
[3]
HODGSON GL, 1956, J EXPT BOTANY, V8, P195
[4]
HORNE F. R., 1966, Outlook on Agriculture, V5, P95
[5]
ISHAG HM, 1969, THESIS READING U
[7]
JONES L. H., 1963, HORT RES, V3, P13