A) essentiality of an element
B) deficiency symptoms caused by an element
C) toxicity caused by an element
D) all of these
Correct Answer: D
Solution :
[d] Hydroponics or soilless culture helps to understand: The essentiality of mineral elements. The deficiency symptoms developed due to non-avaibility of particular nutrient. Toxicity to plant when element is present in excess. Possible interaction among different elements present in plants. The role of essential element in the metabolism of plant.
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