Soil material which moves down a slope under the influence of gravity is described as:

Which one of the following substances found in soils is the MOST resistant to acid leaching?

Which one of the following elements is less common in mafic rocks (compared with felsic rocks)?

An example of a rock, classified as an igneous rock of mafic mineral composition and extrusive (volcanic) origin is:

Which one of the following plant nutrients is likely to be limiting to plant growth as a soil first starts to develop?

Granite and basalt are both:

Other than parent material and time, the major "soil forming factors" are:

Limestone and greywacke both belong to which of the rocks listed:

A soil sequence in which the age of the soil is the only soil-forming factor that is effectively varying is called a:

Which one of the following is a mineral rather than a rock?

Red and/or yellow colours in a weathering soil profile are usually caused by the presence of:

Select the substance that is the most resistant under New Zealand's soil weathering conditions?

Which one of the following best describes the material comprising coastal sand dunes?

Which one of the following is a sedimentary rock?

Which of the following terms best describes a layer of silt deposited on top of a soil surface following a flood?