How is the soil texture analysis done? Describe in brief.

Explain the importance of groundwater as a water resource in India. What are the
problems in overusing ground water?

How is nitrogen important to the plants? Write the sources of this macronutrient
to plants.

What is meant by the cation exchange capacity (CEC) of soils? What is the property
of soil that determines the CEC of soils? How does CEC vary with pH?

State the five “designated best uses” of water as per the Central Pollution Control
Board (CPCB) classification and give one corresponding primary water quality
criterion for each

How do the following factors affect the discharge of pollutants in the atmosphere? (5)
i) Atmospheric stability ii) Temperature iii) Precipitation
 iv) Turbulence v) Solar radiation
 b) Distinguish between the following pairs giving examples: (5)
 i) Stationary and Mobile sources of pollutants
 ii) Indoor and Ambient air poll

Describe the distribution of the world’s water resources among oceans, icecaps/
glaciers, groundwater, and surface water, providing approximate percentages.