Questions in plant-nutrition

Select	Question
	The plants that grow on saline soils with high concentration of $NaCl$, $MgS{{O}_{4}}$ and $MgC{{l}_{2}}$ are called
	Essential elements for plants are
	Which of the following ions of heavy metals participate in process of photosynthesis in higher plants
	Carbon become available to crop plants in the form of
	Which element forms part of structure of chlorophyll molecule
	Death of stem and root tips occur due to deficiency of
	Sinigrin pungent principle of mustard is due to
	Plants requiring two metallic compounds (minerals) for chlorophyll synthesis, are
	Which of the following is essential mineral element and is not a constituent of any enzyme but stimulate the activity of many enzymes
	In plants a common symptom caused by deficiency of P, K, Ca and Mg is the