Home
Class 12
BIOLOGY
Water logging and soil salinity are of t...

Water logging and soil salinity are of the problems that have come in the wake of the Green Revolution. Discuss their causes and adverse effects to the environment.

Text Solution

Verified by Experts

Water logging and soil salinity is caused by extensive irrigation without proper drainage of water.
Continuous presence of water draws salt to the surface of the soil, which gets deposited as a thin crust on the land surface or collecting at the roots of the plants.
Adverse effects
(i) Increased salt content stunts the growth of crop plants.
Root cells saturated with saline water gets damaged.
(iii) Plants die.
(iv) Crop yield gets affected.
(v) Financial loss to the farmers.
Promotional Banner

Topper's Solved these Questions

  • ENVIRONMENTAL ISSUES

    NCERT EXEMPLAR ENGLISH|Exercise Short Answer Type Questions|11 Videos

  • ECOSYSTEM

    NCERT EXEMPLAR ENGLISH|Exercise Long Answer Type Question|12 Videos

  • EVOLUTION

    NCERT EXEMPLAR ENGLISH|Exercise Long answer type Questions|7 Videos

Similar Questions

Explore conceptually related problems

Water logging and soil salinity are the problems that have come in the wake of

_________ and soil salinity are some of the problem that have come in the wake of the green revolution.

After wathicng a programme on TV about te presence of carcinogens (cancer causing agents) Potassium bromate and Potassium iodate in bread and other bakery products, Rupali a class XII student decided to make other awarre about the adverse effects of these carcinogens in food. she consulted the school principle and requested him to instruct the canteen contractor to stop selling sandwiches, pizzas, burgers and other bakery products to the students. The principal took an immediate action ad instructed the canteen contractor to replace the bakery products with some protein and vitamin rich food like fruits, salads, sprouts, etc. The decision was welcomed by the parents and the students. After reading the above passage, answer the following questions: (a) What are the values (at least two) displayed by Rupali? (b) which polysaccharide component of carbohydrates is commonly present in bread? (c) Write the two types of secondary structures of proteins (d) Give two examples of water soluble vitamin.

After watching a programme on TV about the presence of carcinogens (cancer causing agents) Potassium bromate and Potassium iodate in bread and other bakery products, Rupali a class XII student decided to make other aware about the adverse effects of these carcinogens in food. she consulted the school principle and requested him to instruct the canteen contractor to stop selling sandwiches, pizzas, burgers and other bakery products to the students. The principal took an immediate action ad instructed the canteen contractor to replace the bakery products with some protein and vitamin rich food like fruits, salads, sprouts, etc. The decision was welcomed by the parents and the students. After reading the above passage, answer the following questions: (a) What are the values (at least two) displayed by Rupali? (b) Which polysaccharide component of carbohydrates is commonly present in bread? (c) Write the two types of secondary structures of proteins? (d) Give two examples of water soluble vitamin.

Mr. Verma (50kg) and Mr. Mathur (60kg) are sitting at the two extremes of a 4 m long boat (40 kg) standing still in water. To discuss a mechanics problem, they come to the middle of the boat. Neglecting frictioin with water how far does the boat move on the water during the process?

Answer question numbers 4(a)-4 (d) on the basis of your understanding of the following paragraph and the related studied concepts: India today is facing the problem of overuse of resources, contamination of water and soil and lack of methods of processing the waste.The time has come for the world to say goodbye to "single-use plastics".steps must be undertaken to develop environment-friendly substitutes, effective plastic waste collection and methods of its disposal. Indore treated 15 lakh metric tonnes of waste in just 3 years,through biomining and bioremediation techniques.Bioremediation involves introducing microbes into landfill to naturally 'break' it down and biomining involves using trommel machines to shift through the waste to separate the 'soil' and the waste component.The city managed to chip away 15 lakh metric tonnes of waste at a cost of around Rs.10 crore.A similar experiment was successfully carried out in Ahmedabad also. (a) State two methods of effective plastic waste collection in your school. (b) Name any two uses of "single-use plastic" in daily life. (c) If we discontinue the use of plastic,how can an environment-friendly substitute be provided? (d) Do you think microbes will work similarly in landfill sites as they work in the laboratory?Justify your answer.