Questions in plant-nutrition

Select	Question
	The elements arsenic, copper and murcury have which of the following effect
	Boron is absorbed as
	Places where there is copper deposit the soil is
	Iron is present in which of the following
	Which of the following is not a micro or trace element
	That element which helps in electron transport in the process of photosynthesis
	The micronutrient least required by plants is
	Manganese ($Mn^{++}$) ions are required in which part of the plant
	‘Petiole crack’ is caused by the deficiency of
	Which one of the following elements plays an important role in biological nitrogen fixation