QQuestion
Excessive use of fertilizers in agricultural fields reduces the yield of crops. Justify the statement.
ICSEClass XBiologyPollution02 Mark2023 Easy
✓Answer
Excessive use of fertilizers increases the concentration of mineral salts in the soil, making the soil solution hypertonic in relation to the root cells. Water then moves out of the root cells by exosmosis, causing plasmolysis and reducing water absorption. This adversely affects plant growth and reduces crop yield.
Was this answer helpful?
Related Questions
More ICSE Easy level questions
1/12
Which one of the following is a biodegradable waste? (a) Metal cans (b) E-waste (c) Plastic (d) Flowers
Choose the odd one out from the following terms and name the category to which the others belong: (a) Used bandages, Pesticides, Face masks, Syringes. (b) Dust, Smoke, Carbon monoxide, Effluents (c) Uterus, Urethra, Urinary bladder, Ureter (d) Menstrual phase, Telophase, Follicular phase, Luteal phase (e) Malleus, Incus, Cochlea, Stapes
Give two examples of water pollutants.
State any two disadvantages of living close to an airport.
Complete the food chain by mentioning the names of the organisms in (c) and (d):
What are biomedical wastes? Give an example.
Expand the following abbreviations: (a) CFC (b) CNG
Mention any two objectives of Swachh Bharat Abhiyan.
Write any two objectives of Swachh Bharat Abhiyan.
State any two harmful effects of acid rain.
State two harmful effects of acid rain on the environment.
Select and write the two biodegradable wastes from the given list: Styrofoam, Metallic cans, Decaying fruits, Plastic bottles, Newspapers