共 9 条
[1]
CHAPMAN H. D., 1939, SOIL SCI SOC AMER PROC, V4, P196
[2]
Chapman HD, 1937, J AGRIC RES, V55, P0365
[4]
Liebig G. F., 1940, IND ENG CHEM ANAL ED, V12, P174
[6]
Maze P, 1915, CR HEBD ACAD SCI, V160, P211
[7]
SCHARRER K, 1936, Z PFLANZENERNAHR DUN, V45, P83
[8]
SOMMER AL, 1926, CALIF U PUBS AGR SCI, V5, P57
[9]
SZUCS J, 1912, JB WISS BOT, V52, P85