Which of the following methods is used to maintain the soil fertility?
Soil fertility maintained by crop rotation, organic manure, legumes, sustainable practices.
Ref: NCERT Environmental Studies — Soil Pollution and Conservation
Environmental Pollution - Air, Water and Soil
This category covers the fundamentals of environmental pollution across three major media: air, water, and soil. It examines the sources of contaminants, their impact on ecosystems and human health, and common methods used to assess and control pollution. Learners will gain a clear understanding of how these pollutants interact and what measures can reduce their effects.
Filter questions
Which of the following is not a major pollutant which causes soil pollution?
Major soil pollutants heavy metals pesticides; check not major pollutant.
Ref: NCERT Environmental Studies — Soil Pollution and Conservation
Which type of soil has the highest water holding capacity ?
Clay soil highest water holding capacity, small particles high surface area retains water.
Ref: CPCB — Water Pollution Guidelines, NCERT Biology Water Quality
Which among the following options is correct with respect to the factors affecting the formation of soil? 1. Flora, faun
Soil formation factors flora fauna microorganisms humus formation parent rocks climate time topography.
Ref: NCERT Environmental Studies — Soil Pollution and Conservation
The process of decomposition of biodegradable organic matter by the soil bacteria as in ordinary composting techniques b
Decomposition with earthworms assistance called vermicomposting, vermiculture, organic waste management.
Ref: NCERT Environmental Studies — Soil Pollution and Conservation
Which one of the following is not the main cause for soil salinity and sodicity?
Main causes soil salinity sodicity irrigation poor drainage; check not main cause.
Ref: NCERT Environmental Studies — Soil Pollution and Conservation
Which of the following is the factor that determines the ability of soil to change the shape or moulding when wet?
Ability soil to change shape when wet determined by plasticity, clay content, Atterberg limits.
Ref: NCERT Environmental Studies — Soil Pollution and Conservation
Soil pH of acidic soil can be improved by
Acidic soil pH improved by adding lime calcium carbonate, liming raises pH.
Ref: NCERT Environmental Studies — Soil Pollution and Conservation
Find the causes of soil pollution - A. Accidental Spill B. Acid rain C. Deforestation D. Nuclear waste E. Vermicompostin
Soil pollution causes accidental spill acid rain deforestation nuclear waste GM plants, not vermicomposting.
Ref: NCERT Environmental Studies — Soil Pollution and Conservation
Which of the following is not a source of pollution in soil?
Soil pollution sources include industrial waste, pesticides; check not source option.
Ref: NCERT Environmental Studies — Soil Pollution and Conservation
When was the Water (Prevention and Control of Pollution) Act enacted?
Water Act enacted 1974, prevention control of water pollution, CPCB SPCB establishment.
Ref: CPCB — Water Pollution Guidelines, NCERT Biology Water Quality
Impure water can be made pure
Impure water can be made pure by distillation, filtration, purification methods.
Ref: CPCB — Water Pollution Guidelines, NCERT Biology Water Quality
