共 10 条
[1]
AUBERTIN G. M., 1965, SOIL SCI SOC AMER PROC, V29, P290
[2]
BANSAL SP, 1968, THESIS PUNJAB AGR U
[3]
BLAKE G. R., 1955, SOIL SCI SOC AMER PROC, V19, P400
[4]
Johanson D.A., 1940, PLANT MICROTECHNIQUE
[7]
McPHERSON D. C., 1939, NEW PHYTOL, V38, P190, DOI 10.1111/j.1469-8137.1939.tb07098.x
[9]
SWANSON C. L. W., 1956, SOIL SCI SOC AMER PROC, V20, P161, DOI 10.2136/sssaj1956.03615995002000020006x
[10]
WIERSUM L. K., 1957, Plant and Soil, V9, P75, DOI 10.1007/BF01343483