共 11 条
[1]
Cole RC., 1939, HILGARDIA, V12, P429, DOI [10.3733/hilg.v12n06p427, DOI 10.3733/HILG.V12N06P427]
[2]
KANIVETS II, 1938, CHEM SOCIALISTIC AGR, V7, P51
[3]
KANIVETS II, 1937, CHEM IND, V42, P565
[4]
KANIVETZ II, 1937, PEDOLOGY, V32, P1429
[5]
KOLODNY L., 1939, SOIL SCI SOC AMER PROC, V4, P7
[8]
MYERS HE, 1940, J AM SOC AGRON, V40, P664
[9]
PEELE T. C., 1940, JOUR AMER SOC AGRON, V32, P204
[10]
Snedecor G. W, 1938, STAT METHODS