Soil Characteristics
What is how easily a substance can pass through soil?
Permeability
A river can empty into a larger body of water. This forms a delta, a place where soil is carried down a river and left at the end of the river. What is the process that forms a delta?
Deposition
What do we call the different layers of soil?
Horizons
What do we call all the layers or horizons of a soil?
Soil Profile
What substance makes up most of the A horizon?
Humus
What process causes soil to form?
Weathering
Farmers often grow crops in places with hills. This helps prevent erosion. What is this method of farming called?
Contour Plowing
What do we call Horizon A
What is the decayed plant and animal matter in a soil?
Humus
What is Horizon B called?
Subsoil
What refers to how much space is between soil particles?
Porosity
What is the soil conservation method that involves converting steep, sloped land into a series of leveled, stepped platforms?
Terracing
What is in Horizon B or subsoil?
Clay, Minerals, a little humus
What do we call how well a soil can produce plants?
Fertility
What is a use for soil?
Farming, Planting, Construction, Mining
What particle type is the smallest with the least space between particles (sand, silt, or clay)?
Clay
What is one of the things that poor soil protection can lead to?
Starvation, Erosion, Unusable Land, Desertification
What is the bottom layer or Horizon D called?
Bedrock
What factor of soil depends on the size and particles of the soil?
Texture
What force causes the most erosion of soil?
Moving water
What factor of soil formation refers to how acidic or basic a soil is?
pH
What type of conservation farming refers to planting trees at the edges of a field to block wind?
Windbreaks
What is in Horizon C?
Weathered Rock
What geological processes moves sand in a dust storm?
Erosion
What type of soil is made up of 30% sand, 30% clay, 30% silt, and 10% humus? This is the best type of soil for growing plants.
Loam