共 39 条
[32]
ROGERS WS, 1936, ANN RPT E MALLING RE, P111
[33]
SCHOFIELD RK, 1935, 3 T INT C SOIL SCI, V2, P37
[34]
SHIVE JW, 1914, PLANT WORLD, V17, P81
[36]
VEIHMEYER FRANK J., 1927, HILGARDIA, V2, P125
[37]
WHITNEY M, 1903, USDA BUR SOILS B, V22