Basic Soil Horizons

SOIL LAYERS ARE CALLED.......

• MATERIALS
• ORGANIC
• HUMUS
• HORIZONS

THIS HORIZON IS MADE OF mostly fats and waxes from decayed twigs, grass, leaves and other ogranic material......

• A
• B
• C
• O

Partially weathered rock material

• C

• D

• O

• A

Loose soil that is a good mixture of humus and mineral soil particles like sand, silt and clay. This horizon forms on top of the C horizon

• O

• A

• B

• C

This is a mineral layer that is very small particles like clay and oxides that have been leached down out of the A horizon and is a zone of accumulation

• O

• A

• B

• D

MORE MATURE (older soil) SOIL HAS MORE HORIZONS

• FALSE

• TRUE

WHAT LAYER IS TOPSOIL FOUND IN?

• A

• B

• C

• D

Soil horizons form because of additions,________, transformations, and translocations

• relocations

• losses

• gains

When it rains, CaCO3 is leached down and out of soil making it more acidic. This is _______

• addition

• loss

• translocation

If a farmer plants a crop like corn year after year, nutrients like nitrogen, phosphorus, and potassium are being removed. This is _____

• loss

• transformation

• translocation