The availability of calcium is highest in which of the following condition?
A: The cation exchange capacity is 24 cmol(+)/Kg, while the exchangeable calcium is 12 cmol(+)/Kg
B: The cation exchange capacity is 30 cmol(+)/Kg, while the exchangeable calcium is 8 cmol(+)/Kg
C: The cation exchange capacity is 8 cmol(+)/Kg, while the exchangeable calcium is 5 cmol(+)/Kg
D: The cation exchange capacity is 15 cmol(+)/Kg, while the exchangeable calcium is 6 cmol(+)/Kg
A: The cation exchange capacity is 24 cmol(+)/Kg, while the exchangeable calcium is 12 cmol(+)/Kg
B: The cation exchange capacity is 30 cmol(+)/Kg, while the exchangeable calcium is 8 cmol(+)/Kg
C: The cation exchange capacity is 8 cmol(+)/Kg, while the exchangeable calcium is 5 cmol(+)/Kg
D: The cation exchange capacity is 15 cmol(+)/Kg, while the exchangeable calcium is 6 cmol(+)/Kg
举一反三
- 下列情形中，钙离子有效度最高的是（ ）。 A: 阳离子交换量为8 cmol(+)/Kg，交换性钙离子为 5 cmol(+)/Kg B: 阳离子交换量为30 cmol(+)/Kg，交换性钙离子为 8 cmol(+)/Kg C: 阳离子交换量为24 cmol(+)/Kg，交换性钙离子为 12 cmol(+)/Kg D: 阳离子交换量为15 cmol(+)/Kg，交换性钙离子为 6 cmol(+)/Kg
- 下列情形中，钙离子有效度最高的是（ ）。 A: 阳离子交换量为8 cmol(+)/Kg，交换性钙离子为 5 cmol(+)/Kg B: 阳离子交换量为30 cmol(+)/Kg，交换性钙离子为 8 cmol(+)/Kg C: 阳离子交换量为24 cmol(+)/Kg，交换性钙离子为 12 cmol(+)/Kg D: 阳离子交换量为15 cmol(+)/Kg，交换性钙离子为 6 cmol(+)/Kg
- 土壤阳离子交换量的单位是（ ） A: cmol/kg B: µmol/kg C: mmol/kg D: mol/kg
- 土壤阳离子交换量（CEC）的单位是（） A: mg/kg B: cmol/kg C: % D: dS/m
- 土壤阳离子交换量（CEC）的单位是（）。 A: mg/kg;B.cmol/kg;C.%;D..dS/m B: cmol/kg; C: %; D: dS/m