Questions in plant-nutrition

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Which of the following elements is not required by plants for their normal healthy growth
In plant nutrition elements are classified as major or minor depending on
Non-essential element in plant is
Which of the following, one element has not been proved to be essential in plants
Plant ash is an indication of
An essential element is one
Hydroponics are
How the mineral contents of the plant known
Necrosis means
Oily seeds contain

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