Last Quiz

Question 1

Earthworms aid soil structure by physically surrounding particles and gluing them together through the secretion of organic compounds, mainly sugars.

Answer 1

FALSE (Microbes)

Question 2

The benefits of organic matter in the soil include decreased water-holding capacity.

Answer 2

FALSE (Increasing)

Question 3

Fungi, like plants, photosynthesize and are found near the soil surface

Answer 3

FALSE (Algae)

Question 4

The rhizosphere, the narrow zone of soil directly surrounding plant roots, is the most biologically active region in the soil

Answer 4

TRUE

Question 5

Microorganisms represent the largest and most diverse abiotic group in the soil

Answer 5

FALSE (biotic)

Question 6

Root channels will close right after the root decomposes

Answer 6

FALSE (remain open)

Question 7

In healthy soil, the domestic animal weight above the ground surface is substantially exceeded by the weight of the organisms living in the soil

Answer 7

TRUE

Question 8

Soil flora work as a soil engineers, initiating the breakdown of dead plant and animal material, ingesting, and processing large amounts of soil, burrowing biopores for water and air movement

Answer 8

FALSE (Soil fauna)

Question 9

Beats contain 15% to 20% organic matter

Answer 9

FALSE (Mineral soils)

Question 10

The presence of high organic matter in the soil discourages the presence of living organisms in the soil

Answer 10

FALSE (encourages)

Question 10

Soil flora initiate the breakdown of dead plant and animal material

Answer 10

FALSE (Soil fauna)

Question 11

A fertile soil will contain only the major nutrients for basic plant nutrition

Answer 11

FALSE (contain all)

Question 12

A fertilizer can be organic or inorganic material of natural or synthetic origin

Answer 12

TRUE

Question 13

In agriculture, soil erosion refers to the wearing away of a field’s subsoil by the natural physical forces of water and wind or through forces associated with farming activities such as tillage

Answer 13

FALSE (field’s topsoil)

Question 14

When the foundations of any structure are constructed on compressible soil, it leads to plasticity

Answer 14

FALSE (it leads to settlement)

Question 15

The calculated bearing pressures should be equal to the allowable bearing pressures

Answer 15

FALSE (need to be less than)

Question 16

Footings are always subjected to lateral loads

Answer 16

FALSE (often)

Question 17

The magnitude of the elastic settlement will depend on the flexibility of the foundation and on the type of soil that the foundation will rest on it

Answer 17

TRUE

Question 18

The reduction of soil volume may occur due to the removal of water

Answer 18

TRUE

Question 19

Macro organisms represent the soils largest and most diverse biotic group

Answer 19

FALSE (Microoganism)

Question 20

Fungi are the smallest and most diverse soil mircrobes

Answer 20

FALSE (not the smallest)

Question 21

Most of the nitrogen and potassium in fertilizers are water-soluble

Answer 21

TRUE

Question 22

Nuetralization of HNO3 with NH3 produces ammonium nitrate (NH4NO2)

Answer 22

FALSE (NH4NO3)

Question 23

Phosphate rock is a calcium fluorophosphate of sedimentary or igneous origin

Answer 23

TRUE

Question 24

Fluid fertilizers can be applied directly to plant foliage

Answer 24

TRUE

Question 25

Plant analyses can be used as a basis to recommend fertilizer for crops that are harvestable within a short period of time

Answer 25

FALSE (not within a short period of time)

Question 26

The higher the fertility level, the less important the time of application and placement

Answer 26

TRUE

Question 27

Soil degradation conditions could accelerate the soil erosion process

Answer 27

TRUE

Question 28

Surface runoff occurs when the soil is saturated

Answer 28

TRUE

Question 29

Soil movement by rainfall (raindrop splash) is usually greatest and most noticeable during long-duration, low-intensity storms

Answer 29

FALSE (short-duration, high-intensity thunderstorms)

Question 30

Tilling the soil up and down field slopes is more effective in reducing soil erosion than cultivating it across the slope

Answer 30

FALSE (Tilling accelerates soil erosion)

Question 31

Terracing entails performing all tillage and planting of crops on or near the same elevation

Answer 31

FALSE (Contouring)

Question 32

The maximum value of the cover management factor in the universal soil loss equation is 1

Answer 32

TRUE

Question 33

The lesser the control practice done in place, the higher the value of the erosion control practice factor in the universal soil loss equation

Answer 33

TRUE

Question 34

Higher value of specific gravity gives more strength to roads and foundations

Answer 34

TRUE

Question 35

Determination of soil conditions is the most important first phase of work for every type of engineering facility

Answer 35

TRUE

Question 36

The purpose of detailed explorations is to determine the physical properties of the soils for different strata

Answer 36

FALSE (engineering properties)

Question 37

The loading capability of soil depends upon the type of soil

Answer 37

TRUE

Question 38

The soil plasticity is highly affected by the amount of soil moisture

Answer 38

TRUE

Question 39

Soil density is the ratio of the mass of soil solids to the mass of an equal volume of water

Answer 39

FALSE (Specific gravity)

Question 40

Footings are designed based on the nature of the loading, the properties of the footing, and the properties of the soil

Answer 40

TRUE

Question 41

Non-uniform soil bearing can be caused by a foundation pedestal located at the footing center of gravity

Answer 41

FALSE (not being located)

Question 42

Vertical loads are typically seismic or wind loads

Answer 42

FALSE

Question 43

Nitrogen deficiency is difficult to visualize until severe

Answer 43

FALSE (Phosphorus)

Question 44

The fertilizer grade is the relative proportions of primary nutrients in a fertilizer grade divided by the highest denominator for that grade

Answer 44

FALSE (fertilizer ratio)

Question 45

Soil fertility is the status of soil concerning its ability to supply elements essential for plant growth without a toxic concentration of any element

Answer 45

TRUE

Question 46

The best time to apply fertilizer is when plant nutrient deficiency symptoms become obvious

Answer 46

FALSE (too late to apply fertilizer)

Question 47

Shallower soil sampling is advisable in tilled soil

Answer 47

FALSE (advised in no-till systems)

Question 48

The higher the soil fertility level, the more important the time application and placement is

Answer 48

FALSE (the less important)

Question 49

The soil food chain shows what healthy soil needs in the way of soil life

Answer 49

FALSE (soil food web)