Gce Model Questions Vol1 2020 Agricultural Science Question 41
Practice objective / multiple choice question 41 from the 2020 Gce Model Questions Vol1 Agricultural Science examination.
A soil has a cation exchange capacity (CEC) of \(20\ \text{cmol}_\text{c}\,\text{kg}^{-1}\) and a base saturation of \(40\%\). The base cations present are Ca\(^{2+}\) \(15\%\), Mg\(^{2+}\) \(10\%\) and K\(^{+}\) \(5\%\) of the total CEC. If a farmer wants to raise the base saturation to \(60\%\) by adding only calcium in the form of CaCO\(_3\) (which supplies one Ca\(^{2+}\) ion per mole), how many additional cmol\(_\text{c}\) kg\(^{-1}\) of Ca\(^{2+}\) must be added?
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This is Gce Model Questions Vol1 2020 Agricultural Science Question 41. It is one of the objective questions from the 2020 Gce Model Questions Vol1 Agricultural Science examination.
Difficulty level: Easy .
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