共 6 条
[2]
HEWITT EJ, 1970, NITROGEN NUTRITION P, P220
[3]
HOAGLAND DR, 1950, 347 CAL AGR EXP STA
[4]
MAYNARD DN, 1969, AM SOC HORT SCI, V95, P235
[5]
MCKEE HS, 1962, NITROGEN METABOLISM
[6]
VIETS FG, 1971, 413 ARS USDA AGR HDB