AFNR Lesson 3.3 Glossary

Question 1

A layer of soil parallel to the surface, distinct characteristics produced by soil forming proc

Accepted Answer

Horizon

Question 2

Processes whereby earthy or rock material is worn away from any part of the earths surface

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Erosion

Question 3

a size term denoting particles, regardless of mineral composition, diameter less than 2 microns

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Clay

Question 4

Elongated depression between uplands, hills, or mountains

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Valley

Question 5

Accumulation of water-worn pebbles larger than 2 miilimeters in diameter

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Gravel

Question 6

Any vegetation that grows close to the ground, producing protection for the soil

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Ground cover

Question 7

artificial application of water to soil for purpose of increasing production

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Irragation

Question 8

The relative proportion in a soil of the various size groups of individual soil grains

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Soil Texture

Question 9

Matter found and produced by living animals and plants

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Organic matter

Question 10

Unweathered hard rock that lies directly beneath the soil layers

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Bedrock

Question 11

To move or transfer from one place to another, cause to change location; displace

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Translocation

Question 12

Microscopic, wormlike organisms that can attack roots cause stunted plants

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Nematodes

Question 13

Small, mineral, soil particle, range in diameter from .5-.002 mm

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Silt

Question 14

The mineral and organic surface of the earth capable of supprting upland plants

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Soil

Question 15

Voids or openings in the soil that exist between soil particals. hold water and air

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Porosity

Question 16

Mineral matter of variable compostion consolidated or unconsoliated, assembled in masses

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Rock

Question 17

Atmospheric action on rock surfaces producing decomposition of rocks close to the earths surfac

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Weathering

Question 18

Single-celled microoganism, can cause human animal and plant disease

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Bacteria

Question 19

A group of textural classes in which the particles- finer than gravel diameter ranging 2-.5 MM

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Sand

Question 20

Desgnating the inorganic nature of a substance

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Mineral

Question 21

any living individual whether plant or animal

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Organism

Question 22

The addition of sediment, as by flowing water

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Deposition

Question 23

change in form, appearance, nature or character

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Transformation

Question 24

A division of the animal kingdom

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Arthopod

Question 25

Removal of soluble constituents from the soils or other materials by percolating water

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Leaching

Question 26

Vertical section of a soil. Face of an exposure made by a cutShow a succession of layers

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Profile

Question 27

Slope of the land and the positon on the landscape, top of a hill, hillside,

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Topography

Question 28

The long term average weather conditions

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Climate

Question 29

To gather or collect

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Accumulation

Question 30

soil whose properties are dominated by soil minerials, containing less that 20% organic matter

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Mineral Soil

Question 31

Color difference on a mass of poorly drained soil

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Mottle

Question 32

Plantlike organisms that have chlorophyll they get their nourishment from living or decaying om

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Fungi

Question 33

Organism so small that it cannot be seen clearly w/o the use of a microscope

Accepted Answer

Microorganism

Question 34

The horizon of weathered rock or partially weathered soil material

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Parent material

AFNR Lesson 3.3 Glossary

Questions 34

AFNR Lesson 3.3 Glossary

Questions 34