Questions in plant-nutrition

Select	Question
	Which of the following element is not essential for plants
	Which of the following is not caused by deficiency of mineral nutrition
	Hydroponics is a
	Cultivation by sand culture is also called
	Who gave the criteria of essentiality
	Inorganic nutrients are present in the soil in the form of
	Phytotron is a device
	Tracer elements are
	Which of the following is used as green manure
	The number of essential elements required for normal growth of plant is