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From Keys to Soil Taxonomy, 10th Ed., USDA, NRCS The placic horizon (Gr. base of plax, flat stone; meaning a thin cemented pan) is a thin, black to dark reddish pan that is cemented by iron (or iron and manganese) and organic matter. Required Characteristics A placic horizon must meet the following requirements: 1. The horizon is cemented or indurated with iron or iron and manganese and organic matter, with or without other cementing agents; and 2. Because of lateral continuity, roots can penetrate only along vertical fractures with a horizontal spacing of 10 cm or more; and 3. The horizon has a minimum thickness of 1 mm and, where associated with spodic materials, is less than 25 mm thick.
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Which horizon is materials that are leached from horizon A are deposited into this horizon?
Horizon B
List soil horizons in the correct order from top to bottom?
O horizon A horizon E horizon B horizon and c horizon
What Horizon has the highest amount of organic material?
A horizon B horizon C horizon O horizon
What soil horizon contains topsoil?
the horizon that contains topsoil is the A HORIZON
What is the horizon layer?
the horizon layer is a layer that separates the soil layers. For and example O horizon which is litter ,A horizon which is topsoil ,B horizon which is subsoil , C horizon which is weathered bedrock and R horizon which is unweathered bedrockI Love All My Ask Friends Peace Myah Is Out!!!!
Which is correct an horizon or a horizon?
a horizon
Which horizon is materials that are leached from horizon A are deposited into this horizon?
Horizon B
List soil horizons in the correct order from top to bottom?
O horizon A horizon E horizon B horizon and c horizon
What horizon contains topsoil?
the horizon that contains topsoil is the A HORIZON
What Horizon has the highest amount of organic material?
A horizon B horizon C horizon O horizon
What is horizon B?
A. The A horizon.
Do you write on the horizon or in the horizon?
on
What are the 3 horizons of soil?
horizon A , horizon B and horizon C
What is it called where the sky and sea appears to meet?
the answer is horizon
What soil horizon contains topsoil?
the horizon that contains topsoil is the A HORIZON
How does the b horizon differ from a horizon and the c horizon?
The C horizon contains mainly parent material, while the B horizon contains mainly clay particles and the A horizon; mainly silt sized particles and humus
What is the horizon layer?
the horizon layer is a layer that separates the soil layers. For and example O horizon which is litter ,A horizon which is topsoil ,B horizon which is subsoil , C horizon which is weathered bedrock and R horizon which is unweathered bedrockI Love All My Ask Friends Peace Myah Is Out!!!!
