共 22 条
[1]
ALDERMAN WH, 1916, W VIRGINIA EXPT STA, V158
[5]
CAIN JC, 1971, J AM SOC HORTIC SCI, V96, P664
[6]
Childers N. F., 1995, MODERN FRUIT SCI
[7]
CLELAND RE, 1969, PHYSL PLANT GROWTH D, P49
[8]
ELFVING DC, 1986, ACTA HORTIC, V179, P473
[9]
FELLAND CM, 1998, PENNSYLVANIA TREE FR
[10]
Forshey C. G., 1992, Training and pruning apple and pear trees