共 8 条
[3]
Jackson ML, 1958, SOIL CHEMICAL ANALYS
[4]
SAYRE ID, 1926, OHIO J SCI, V26, P233
[5]
Washburn EW, 1928, INT CRITICAL TABLES, VIII
[6]
WEAST RC, 1966, HANDBOOK CHEMISTRY P
[7]
WHITE D. P., 1965, Quarterly Bulletin. Michigan State University Agricultural Experiment Station, V47, P606
[8]
WHITE DONALD P., 1965, P47