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WorksheetsSoil Texture and Structure
Total questions: 39
Worksheet time: 10hrs 45mins
What is mineral matter
inorganic material in the soil
a chart used to differentiate several classes
when a ribbon of soil forms easily and remains long
the finenss or coarseness of a soil
What is the largest mineral particle size
silt
clay
sand
soil texture
What is the smallest soil particle size?
clay
silt
sand
texture
What soil particle creates large pore spaces that improve aeration?
sand
silt
clay
Which soil particle lacks the ability to hold nutrients and are not fertile?
sand
silt
clay
Which soil particle creates small pore spaces resulting in poor aeration and water drainage?
Sand
Silt
Clay
Which soil particle forms hard clumps when dry an sticky when wet?
sand
silt
clay
Which soil particle feels like flour when dry and smooth like velvet when moist?
sand
silt
clay
Which soil particle feels gritty to the touch?
sand
silt
clay
What is soil texture?
the chart used to differentiate several classes of soil
the fineness or coarseness of a soil
the in field method to classify soil texture by feel
the inorganic material in soil
What is the texture triangle?
soil clusters
a chart used to differentiate several classes of soil
the in field method to classify soil texture by feel
the ability of a soil to retain water
What is the soil type for a soil sample with 50% clay, 30% sand, and 20% silt?
clay
clay loam
sandy clay loam
silty clay
What is the soil type for a soil with 32% clay, 27% sand,and 41% silt?
clay
clay loam
sandy clay loam
silt
What type of soil is 28% clay, 63% sand, 9% silt?
silty clay
clay
loamy sand
sandy clay loam
How many basic textural classes are there when dealing with the texture triangle?
5
7
10
12
What is the in field method used to classify soil texture?
texture triangle
ribbon method
mineral matter
soil structure
How many textural classes are there for the ribbon method?
5
7
10
12
What is water holding capacity?
the ability in which soil is tilled
the inorganic material in the soil
the arrangement of soil particles into aggregates
the ability of soil to retain water
What is soil structure?
soil clusters
inorganic material in soil
the fineness and coarseness of soil
the arrangement of soil particles into aggregates
What are soil clusters called?
aggregates
peds
clods
sand
What are naturally occurring soil clusters called?
peds
clods
aggregates
crumbs
What are clumps of soil cased by tillage called?
peds
aggregates
clods
single grain
Which type of soil structure consists of block like structures. These structures look like dice.
blocky
crumb
massive
single grain
Which soil structure type is very large with no apparent structure. The soil particles cling together in very large structures.
single grain
massive
granular
blocky
What soil structure forms very small clumps. These clumps are very porous and weakly held together.
platy
prismatic
crumb
single grain
What soil structure consists of individual vertical units. This structure is different from columnar structure in the fact that these are much longer.
columnar
granular
prismatic
granular
What soil structure forms units that are plate-like. these structures are usually horizontal and over lap each other.
granular
massive
blocky
platy
What soil structure has no apparent structure. This structure is sand-like particles that does not form aggregates.
single grain
massive
granular
platy
What soil structure consists of spherical units that are strongly held together?
crumb
granular
platy
single grain
What soil structure type is similar to the prismatic structure except is have very distinct and rounded tops?
prismatic
crumb
massive
columnar
Using the texture triangle, what soil type consists of 32% clay, 37% sand, and 31% silt?
sandy clay
sandy clay loam
silty clay loam
clay loam
Using the soil texture triangle, what soil type consists of 15% clay, 47% silt, and 38% sand?
sand
loam
clay loam
sandy loam
Using the texture triangle, what type of soil consists of 6% clay, 17% sand, and 77% silt?
sand
silt
clay
silt loam
Using the texture triangle, what type of soil consists of 39% clay, 52% silt, and 9% sand?
sandy loam
silty clay loam
silty clay
sandy clay
Using the ribbon method, what kind of texture would be present if the soil created a ribbon of 1 inch?
moderately course texture
medium texture
moderately fine textured
fine texture
Using the ribbon method, what soil texture would it be considered if you had a soil that did not create a ribbon and feels gritty, but is not completely sand?
course texture
moderately course texture
medium texture
fine texture
Using the ribbon method, what soil texture is considered when no ribbon is formed due to the sample breaking less that 3/4 inches long?
moderately fine texture
medium texture
moderately course texture
course texture
Why is soil texture important?
because it is difficult for plants to survive in bad soil structure.
because texture is how the soil feels
because texture adds nutrients to the soil
texture determines the soil characteristics that affect plant growth
Why is soil structure important?
because different separates have different masses and have corresponding pore spaces
because structure can be damaged by driving heavy machinery over soils
because structure affects air and water movement in the soil and nutrient availability for plants
because aggregates form
