Exam 5: Soil Water: Characteristics and Behavior

The water content in a soil is known to be .2 m³/m³ and the potential of pure water outside the system is assumed to be 0.If the soil is a clay loam you would calculate the soil water potential (in kPa) to be

(Multiple Choice)

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Question 21

Unsaturated water flow _____________.

(Multiple Choice)

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Question 22

The matric potential of soil water is _____.

(Multiple Choice)

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Question 23

At which of the following soil moisture potentials (expressed as kPa) is the soil water held most tightly?

(Multiple Choice)

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Question 24

Soils high in organic matter commonly hold more available water than comparable soils with lower organic matter levels.This is most likely due to what characteristics of the high O.M.soils

(Multiple Choice)

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Question 25

The tenacity with which water is held in soils is directly related to the soil moisture content, the higher the moisture level the greater the attraction of the water to the soil.

(True/False)

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Question 26

Gypsum or nylon blocks are most useful in estimating the soil water content if the soil is quite dry.

(True/False)

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Question 27

Plant roots obtain access to soil water in which of the following ways?

(Multiple Choice)

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Question 28

The hydrogen end of a water molecule is attracted to positively charged cations such as Na⁺ and Ca²⁺.

(True/False)

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Question 29

Which of the following expressions in kPa is most apt to characterize the gravitational potential of a clay loam surface soil?

(Multiple Choice)

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Question 30

Which of the following statements concerning applications or capabilities of soil moisture measuring devices is (are) true for the use of a drying oven and balance?

(Multiple Choice)

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Question 31

Capillary movement is made possible by the processes of cohesion and adhesion.

(True/False)

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Question 32

The water potential at the field capacity for most soils is in the range of -10 to -30 kPa.

(True/False)

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Question 33

Osmotic and matric potentials are commonly negative because the soil water has a lower energy level than that of pure water.

(True/False)

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Question 34

The osmotic potential is dependent upon the presence of salts and other solutes in the soil.

(True/False)

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Question 35

Which of the following means of estimating soil water levels gives a direct measurement of the water content?

(Multiple Choice)

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Question 36

Capillarity in soils _____.

(Multiple Choice)

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Question 37

The effect of soil organic matter on the amount of water available to plants is due to organic matter influence on total soil porosity as well as to the water-supplying power of the soil organic matter.

(True/False)

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Question 38

Filling the bottom half of a flower pot with gravel will greatly improve the aeration of the soil-mix in the top half.

(True/False)

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Question 39

Showing 21 - 39 of 39

The water content in a soil is known to be .2 m³/m³ and the potential of pure water outside the system is assumed to be 0.If the soil is a clay loam you would calculate the soil water potential (in kPa) to be

Unsaturated water flow _____________.

The matric potential of soil water is _____.

At which of the following soil moisture potentials (expressed as kPa) is the soil water held most tightly?

Soils high in organic matter commonly hold more available water than comparable soils with lower organic matter levels.This is most likely due to what characteristics of the high O.M.soils

The tenacity with which water is held in soils is directly related to the soil moisture content, the higher the moisture level the greater the attraction of the water to the soil.

Gypsum or nylon blocks are most useful in estimating the soil water content if the soil is quite dry.

Plant roots obtain access to soil water in which of the following ways?

The hydrogen end of a water molecule is attracted to positively charged cations such as Na⁺ and Ca²⁺.

Which of the following expressions in kPa is most apt to characterize the gravitational potential of a clay loam surface soil?

Which of the following statements concerning applications or capabilities of soil moisture measuring devices is (are) true for the use of a drying oven and balance?

Capillary movement is made possible by the processes of cohesion and adhesion.

The water potential at the field capacity for most soils is in the range of -10 to -30 kPa.

Osmotic and matric potentials are commonly negative because the soil water has a lower energy level than that of pure water.

The osmotic potential is dependent upon the presence of salts and other solutes in the soil.

Which of the following means of estimating soil water levels gives a direct measurement of the water content?

Capillarity in soils _____.

The effect of soil organic matter on the amount of water available to plants is due to organic matter influence on total soil porosity as well as to the water-supplying power of the soil organic matter.

Filling the bottom half of a flower pot with gravel will greatly improve the aeration of the soil-mix in the top half.

The Soils Around US

Formation of Soils From Parent Materials

Soil Classification

Soil Architecture and Physical Properties

Soil and the Hydrologic Cycle

Soil Aeration and Temperature

Soil Colloids: Seat of Soil Chemical and Physical Activity

Soil Acidity

Soils of Dry Regions: Alkalinity, Salinity, and Sodicity

Organisms and Ecology of the Soil

Soil Organic Matter

Nitrogen and Sulfur Economy of Soils

Soil Phosphorus and Potassium

Micronutrients and Other Trace Elements

Practical Nutrient Management

Soil Erosion and Its Control

Soils and Chemical Pollution

Geographic Soils Information

Prospects for Global Soil Quality

Filters

Exam 5: Soil Water: Characteristics and Behavior

The water content in a soil is known to be .2 m3/m3 and the potential of pure water outside the system is assumed to be 0.If the soil is a clay loam you would calculate the soil water potential (in kPa) to be

Unsaturated water flow _____________.

The matric potential of soil water is _____.

At which of the following soil moisture potentials (expressed as kPa) is the soil water held most tightly?

Soils high in organic matter commonly hold more available water than comparable soils with lower organic matter levels.This is most likely due to what characteristics of the high O.M.soils

The tenacity with which water is held in soils is directly related to the soil moisture content, the higher the moisture level the greater the attraction of the water to the soil.

Gypsum or nylon blocks are most useful in estimating the soil water content if the soil is quite dry.

Plant roots obtain access to soil water in which of the following ways?

The hydrogen end of a water molecule is attracted to positively charged cations such as Na+ and Ca2+.

Which of the following expressions in kPa is most apt to characterize the gravitational potential of a clay loam surface soil?

Which of the following statements concerning applications or capabilities of soil moisture measuring devices is (are) true for the use of a drying oven and balance?

Capillary movement is made possible by the processes of cohesion and adhesion.

The water potential at the field capacity for most soils is in the range of -10 to -30 kPa.

Osmotic and matric potentials are commonly negative because the soil water has a lower energy level than that of pure water.

The osmotic potential is dependent upon the presence of salts and other solutes in the soil.

Which of the following means of estimating soil water levels gives a direct measurement of the water content?

Capillarity in soils _____.

The effect of soil organic matter on the amount of water available to plants is due to organic matter influence on total soil porosity as well as to the water-supplying power of the soil organic matter.

Filling the bottom half of a flower pot with gravel will greatly improve the aeration of the soil-mix in the top half.

The Soils Around US

Formation of Soils From Parent Materials

Soil Classification

Soil Architecture and Physical Properties

Soil and the Hydrologic Cycle

Soil Aeration and Temperature

Soil Colloids: Seat of Soil Chemical and Physical Activity

Soil Acidity

Soils of Dry Regions: Alkalinity, Salinity, and Sodicity

Organisms and Ecology of the Soil

Soil Organic Matter

Nitrogen and Sulfur Economy of Soils

Soil Phosphorus and Potassium

Micronutrients and Other Trace Elements

Practical Nutrient Management

Soil Erosion and Its Control

Soils and Chemical Pollution

Geographic Soils Information

Prospects for Global Soil Quality

Filters

The water content in a soil is known to be .2 m³/m³ and the potential of pure water outside the system is assumed to be 0.If the soil is a clay loam you would calculate the soil water potential (in kPa) to be

The hydrogen end of a water molecule is attracted to positively charged cations such as Na⁺ and Ca²⁺.