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    Question

    A-value technique is used to calculate the original

    soil supply of:
    A N Correct Answer Incorrect Answer
    B P Correct Answer Incorrect Answer
    C K Correct Answer Incorrect Answer
    D S Correct Answer Incorrect Answer

    Solution

    A' value concept was developed by Fried and Dean (1952). When the plant is confronted with two sources of a given nutrient, the plant will absorb from each of these in proportion to the respective amounts available.

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