Soil Grade 7 CBSE

Which one of the following is a step in the formation of soil?

• Earthquakes and volcanic eruptions

• Weathering of rocks

• Addition of hummus

• All of these

Which of the following does not cause soil erosion?

• Deforestation

• Terrace farming

• Floods

• Overgrazing

Soil conservation measures are mainly aimed at protecting

• Plants

• top soil

• Sub soil

• soil organisms

In which horizon of soil minerals are found?

• A

• B

• C

• None of these

The best top soil for growing plants is

• sandy soil

• loamy soil

• clayey soil

• all of these

The mixture of rock particles and humus is called

• soil

• Weathering

• Silt

• Gravel

Cotton grows well in

• Black soil

• Red soil

• Clayey soil

• Loamy soil

In which of the following humus is present in reasonable amount

• A

• B

• C

• bedrock

Which horizon consists of small lumps of rocks with cracks and crevices?

• A

• B

• C

• None of these

Soil that can retain water in it

• Sandy

• Loamy

• Clayey

• Black