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Flashcards in Soils Deck (9)
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1

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

Sandy Loam

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?

Yes.

3

What does soil pH affect?

Microbial and faunal communities

Cycling of nutrients

Yield of crops

4

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

The soil is anaerobic and greyer in colour.

5

What is the simplest definition of soil?

Must contain living matter.

6

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

Aluminium and Manganese.

7

Organic matter breaks down in soil to form what?

Humus.

8

Why are soil maps used?

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

9

What kind of consistency will clayey soil have?

Smooth, can be rolled out into a ribbon.