Soils

Question 1

A soil with 60% sand and 30% silt has what texture?

Answer 1

Sandy Loam

Question 2

Could a soil with a Munsell Colour of 10YR 6/3 could change to a Munsell Colour of 10YR 3/3 by adding organic matter?

Answer 2

Yes.

Question 3

What does soil pH affect?

Answer 3

Microbial and faunal communities

Cycling of nutrients

Yield of crops

Question 4

Iron gives soil its red colour. What would a change from Iron (III) [Fe3+] to Iron (II) [Fe2+] indicate?

Answer 4

The soil is anaerobic and greyer in colour.

Question 5

What is the simplest definition of soil?

Answer 5

Must contain living matter.

Question 6

When a soil has a pH of lower than 5, what two elects increase to toxic levels?

Answer 6

Aluminium and Manganese.

Question 7

Organic matter breaks down in soil to form what?

Answer 7

Humus.

Question 8

Why are soil maps used?

Answer 8

To identify soils and their properties, determine the land drainage capabilities of an area and determine the suitability of soils for particular crop.

Question 9

What kind of consistency will clayey soil have?

Answer 9

Smooth, can be rolled out into a ribbon.