3 Soil Properties Online Quiz Questions

True

False

True

False

Pure sand, because it stores the most plant-available water

Loam, because its mixture of particle sizes often balances water movement and storage

Pure clay, because it drains and aerates most rapidly

Compacted clay, because compaction creates more large pores

Water is likely to drain readily, and the soil may store less plant-available water.

Water is likely to remain held tightly in small pores, so drainage will be slow.

Water movement and storage will be identical to those in every clay-rich soil.

The soil will necessarily have no air movement because sand lacks pores.

Macropores commonly allow air and water to move through soil and drain under gravity.

Micropores hold water more strongly than larger pores.

Compaction can reduce pore space, especially the larger pores.

Pore size does not affect whether soil water is stored or moves.

It supplies energy for soil organisms.

It releases nutrients as it decomposes.

It helps bind particles into stable aggregates.

It makes every soil's pH permanently equal to 7.

The soil with stable aggregates may infiltrate water better because its structure can support more connected pores.

The soil with stable aggregates must have a different texture, because aggregation changes particle-size proportions.

The compacted soil must infiltrate better because compaction creates more large pores.

The two soils must function identically because texture alone determines infiltration.

They can protect soil from raindrop impact and help reduce erosion.

They guarantee that soil pH will become neutral.

They change all mineral particles into clay.

They prevent all water from entering the soil.

Their texture differs because their particles are arranged differently.

Their structure differs because their particles are arranged differently.

Their porosity must be identical because their particle proportions are identical.

Their pH differs because their aggregates have different shapes.

Water drains readily and air moves through the soil easily.

Water is held so tightly that plants cannot extract any of it.

Water and air move slowly because the soil has many micropores.

Water storage is high because sandy soils have abundant organic matter.

True

False

Micropores mainly drain under gravity, while macropores hold water most strongly.

Both pore sizes serve only to store water, not to move it.

Macropores commonly aid air and water movement; micropores hold water more strongly.

Macropores prevent root growth, while micropores provide most soil aeration.

Its total water content must be low because clay drains quickly.

Some water may be held too tightly for plants to extract, despite high total water retention.

All water in clay soil is plant-available because clay retains nutrients.

Its plant-available water depends only on pH, not water retention.