SOIL PHYSICAL PROPERTIES

What are the three main pigments of soil colour

• black

• red

• white

• green

What does black soil colour contains

• iron and aluminium oxides

• silicates and salts

• organic matter

What is the manual used for determining colour charts

What are the three elements used for description in the colour chart

• colour

• hue

• value

• chrome

lightness or darkness i.e. whiteness or blackness

The textural class of a soil is determined by the percentage of

• sand

• soil

• silt

• clay

Choose the characteristics of a loamy soil

• Fine texture

• high organic matter content

• Well aerated & rapid drainage

• high water holding capacity

The 12 names of the different soil texture is classified in a

_______ relates to the grouping or arrangement of particles

• soil chemical

• soil structure

• soil texture

• soil pH

How to measure the mass of soil per unit volume

• Soil density

• bulk density

• feel method

• Hydrometer method