28. Give reasons for the following
a) legumes does not require nitrogenous fertilizers.
b) Carbon dioxide is necessary for plants, still it is considered as a pol
cl Forests are considered as renewable natural resourc
Answers
a.The nitrogen fixing bacteria reside in the root nodules of the leguminous plants. They convert atmospheric nitrogen into soluble nitrogenous compounds. These nitrogenous compounds make the soil fertile. Hence a legume crop does not require nitrogenous fertilisers.
b.
carbon dioxide gas is necessary for plants to performs photosynthesis. ... It is also a greenhouse gas. Upto certain concentration (approx imatuly 350 ppm) in atmosphere, it is both good raw material as well as essential for keeping the earthworm.
c.Forest are renewable natural resource because renewable resources are those that get regenerated or replenished rapidly. Some resource replenish themselves(like wildlife and forests) and some can be replenished with the help of physical, chemicaland mechanical process(like soil and water)
Answer:
b) It is harmful and poisonous to humans and animals but not for plants.
Explanation:
during photosynthesis carbon dioxide is the main component for plants