WorksheetsSoil Physical Properties Quiz
Total questions: 30
Worksheet time: 16mins
The relative proportion of sand, silt, and clay in a soil sample is called:
Soil color
Soil texture
Soil structure
Soil porosity
Which soil separate has the largest particle size?
Clay
Silt
Sand
Gravel
The Munsell Soil Color Chart is used to measure:
Soil temperature
Soil porosity
Soil color
Soil consistency
A dark soil color is usually an indication of:
High iron oxides
High organic matter
Poor drainage
Low fertility
Reddish soil color is caused mainly by:
Iron oxides
Organic matter
Sulfur compounds
Manganese oxides
Mottled soils with spots or blotches indicate:
Good aeration
Drainage problems
High fertility
Presence of humus
Which soil structure type is typical of paddy soils?
Granular
Platy
Columnar
Blocky
Which soil separate has the smallest particle size?
Sand
Gravel
Clay
Silt
A soil textural class with ≥70% sand is classified as:
Loam
Clay loam
Sandy soils
Silty clay
The bulk density of soil is defined as:
Mass of dry soil / volume of solids
Mass of dry soil / total volume
Mass of moist soil / pore volume
Mass of solids / pore space
The ideal/optimal particle density of mineral soil is about:
1.33 g/cm³
2.65 g/cm³
3.00 g/cm³
0.98 g/cm³
The ideal/optimal bulk density of agricultural soils is about:
0.98 g/cm³
2.65 g/cm³
1.33 g/cm³
1.50 g/cm³
The void ratio (e) is defined as:
Vt / Vs
Vp / Vs
Vs / Vt
Ms / Mw
Soil porosity is important because it affects:
Aeration and water movement
Soil temperature
Soil color development
Plasticity index
A soil with PI (plasticity index) greater than 17 is classified as:
Non-plastic
Low plasticity
Medium plasticity
Highly plastic
Which law governs the principle of hydrometer method of soil texture analysis?
Darcy's law
Stokes' law
Newton's law
Pascal's law
Which soil structure type is associated with granular peds?
Platy
Blocky
Spheroidal
Columnar
The grade of soil structure with durable distinct peds, breaking almost completely into entire peds is:
Weak
Moderate
Strong
Structureless
The type of soil water that is available to plants is:
Gravitational water
Capillary water
Hygroscopic water
Superfluous water
Permanent wilting point occurs at about:
0 atm
1/3 bar
15 bar
31 bar
Soil air differs from atmospheric air mainly because:
It contains more oxygen
It contains more carbon dioxide
It is identical in composition
It is more abundant in nitrogen
Aeration porosity values below ______ are considered limiting for root growth.
5%
10%
20%
30%
Which soil temperature range is most favorable for seed germination?
0-5 °C
10-20 °C
13-38 °C
40-50 °C
Which soil separate contributes most to nutrient storage and CEC?
Sand
Gravel
Clay
Silt
Which soil property describes the resistance of soil to change in pH?
Cohesion
Buffering capacity
Porosity
Plasticity
Rock fragments larger than 24 inches are called __________.
The arrangement of primary particles into secondary aggregates or peds is called __________.
The ability of a soil to resist breaking apart at different moisture contents is called __________.
The exchange of gases between soil and the atmosphere is called __________.
The property that refers to the ratio of mass of dry soil solids to the volume of those solids alone is __________.
