共 9 条
[1]
HOYLE M. C., 1965, SOIL SCI SOC AMER PROC, V29, P475
[2]
VARIATION IN CONTENT OF MICROELEMENTS IN YELLOW BIRCH FOLIAGE DUE TO SEASON AND SOIL DRAINAGE
[J].
SOIL SCIENCE SOCIETY OF AMERICA PROCEEDINGS,
1969, 33 (03)
:458-&
[3]
Leaf A. L., 1973, SOIL TESTING PLANT A, P427
[4]
LOWRY GL, 1965, 425 PULP PAP RES I C
[5]
LYFORD WH, 1966, 16 HARV FOR PAP
[6]
SAFFORD L O, 1974, Canadian Journal of Forest Research, V4, P549, DOI 10.1139/x74-079
[9]
YOUNG HE, 1967, 28 MAIN AGR EXP STN