Biology (5090) Topic 6 · Plant nutrition 6.3 Mineral nutrition Practise the roles of mineral ions in plants, deficiency symptoms, fertiliser use, and the uptake of nitrate and magnesium ions by roots. Key TheoryLearn FirstLoading… Common MistakesAvoid TheseLoading… StrategyApply ThisLoading… Practice 1EasyLoading… Practice 2MediumLoading… Practice 3AdvancedLoading…