Question

If dry weight of a plant is reduced by ______ % then the concentration at which this occurs is considered toxic.

• A. 5
• B. 10
• C. 15
• D. 20

Answer 1

The correct option is B 10

Micronutrients are required by plants in small quantities. A moderate decrease results in deficiency while moderate increase results in toxicity.

Reduction in the dry weight of tissues by 10% due to a mineral concentration is considered as toxicity caused by that particular mineral. However, the concentration at which this occurs is different for different micronutrients.