Which of the following is not true for fertilizers ? *
options
(a) They increase the yield.
(b) Their excessive use disturbs the balance of nutrients in soil.
(c) They are generally used in small quantity.
(d) They are environment friendly.
Answers
Answer:
D Option
Hope it helps...
The by-products of fertilizer industries are pesticides and some chemical fertilizers. They are non-biodegradable, so they get accumulated at each trophic level. These mix up with soil and water. From there, these pesticides are absorbed by the growing plants along with water and minerals.
When herbivores eat these, these poisonous chemicals pass into their bodies through the food chain. When carnivores eat herbivores, these pesticides transfer to their bodies. Man being omnivore, eats both plants and herbivores and these gets accumulators into their body.
Thus, pesticides enter the food chain at the producer level and in the process of transfer of food through food chains, these harmful chemicals get concentrated at each trophic level. This is called bio magnification.
Therefore, the correct answer is option D.