Question

    The 17th nutrient added to the list of essential elements is

    A Nickel Correct Answer Incorrect Answer
    B Boron Correct Answer Incorrect Answer
    C Chlorine Correct Answer Incorrect Answer
    D Molybdenum Correct Answer Incorrect Answer

    Solution

    Nickel (Ni) was added to the list of essential plant nutrients late in the 20th century by Brown and colleagues (1987). 

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