共 8 条
[2]
HALL AD, 1911, REPORT AGRICULTURE S
[3]
Pipper C.S., 1950, SOIL PLANT ANAL, V1st, P47
[4]
PIZER NH, 1931, 39 U READ DEP AGR CH
[6]
TEMPLE MS, 1929, 38 U READ FAC AGR HO
[7]
WEBSTER R, 1964, 8 T INT C SOIL SCI
[8]
WRIGHT CH, 1939, SOIL ANALYSIS HANDBO