Environmental Studies ยท Biology

Soil Science and Fertilizers

1,537 Questions

Soil science focuses on soil formation, classification, and fertility management using fertilizers and organic amendments. Agricultural and environmental science exams heavily feature questions on biofertilizers, mycorrhiza, and phytoremediation. Practice these questions to build a strong understanding of soil nutrient cycles.

Phytoremediation techniquesOrganic soil amendmentsBiofertilizers and mycorrhizaNitrous oxide emissionsIn-situ soil remediationGreen manuring effects

Soil Science and Fertilizers Questions

Multiple choice

Droppings of animals make the soil fertile

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Animal waste, or droppings, contains nutrients like nitrogen and phosphorus that break down and enrich the soil, acting as a natural fertilizer.

Multiple choice

Compost helps preserve the health of soil because it ____

  1. is a natural fertilizer

  2. contains pesticides that kills insects

  3. adds artificial fertilizers that help plants grow

  4. breaks rock down into additional soil
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Compost is decomposed organic matter that adds essential nutrients back into the soil, acting as a natural fertilizer that improves soil structure and health.

Multiple choice

Nitrates present soil is taken up by

  1. Plant body

  2. Animals

  3. Scavengers

  4. Used by rhizobium bacteria
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Plants absorb nitrates from the soil through their roots to synthesize proteins and other essential compounds.

Multiple choice

pathaogens can be present in and transmited through.......

  1. soil

  2. soil,water and air

  3. soil and water

  4. water and air
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pathogens exist and spread through all three mediums: soil (fungal/bacterial), water (many bacterial/viral), and air (fungal spores, viral particles). The comprehensive answer is B.

Multiple choice

What does not happen to topsoil when it erodes?

  1. the nutrients of the topsoil are depleted

  2. CO2 levels can increase because stored carbon is released

  3. eroded topsoil ends up as sediment in water & can kill fish

  4. the eroded layers quickly restore themselves
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Topsoil formation is an extremely slow geological process. Once topsoil is eroded, it does not restore itself quickly; it can take hundreds or thousands of years to replace.

Multiple choice

What is organic fertilizer derived from?

  1. Plant and animal materials

  2. Pesticides

  3. No such thing as organic fertilizer

  4. Inorganic chemicals
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Organic fertilizers are derived from natural sources, specifically the decomposition of plant matter (like compost) and animal waste (like manure).

Multiple choice some important compounds of magnesium and calcium the s-block elements chemistry

Single superphosphate is preferred for phosphorus application in groundnut because it also provides:

  1. sulphur

  2. calcium

  3. sulphur and calcium both

  4. none of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Phosphorus and calcium are the major nutrients limiting groundnut production,which can be obtained from SSP along with phosphorus. So, that is why is used in groundnut cultivation.