2nd Period Starter

The soil horizons

• O,A,B,C,D,R

• O,A,B,C,D

• O,A,B,C,R

• O,A,B,C

The soil structure of sandy soils

• loose soil structure

• granular soil structure

• blocky structure

• platy structure

Soil Structure of silty soil

• loose soil structure

• granular soil structure

• blocky soil structure

• platy soil structure

Soil structure of clayey soils

• granular soil structure

• sandy soil structure

• blocky or platy structure

• loose soil structure

A soil survey is

• is an official overview by the FDA of the soil in an area

• is an official overview by the EPA of the soil in an area

• is an official overview by the USDA of the soil in an area

• is an official overview by the NCDEQ of the soil in an area

Rate texture of particles from smallest to largest

• Sand, Silt, Clay

• Clay, Silt, Sand

• Sand, Silt, Soil

• Silt, Sand, Clay

pH levels of acidic soil

• 0-6.9

• 8-14

• 7

• 0-14

the rate at which water moves through the soil.

• Porosity

• Permeability

• Water holding capacity

• movement of water

Three primary nutrients of soil

• Nitrogen, Sulfur, and Potassium

• Nitrogen, Phosphorus, and Calcium

• Oxygen, Phosphorus, and Potassium

• Nitrogen, Phosphorus, and Potassium

What is a Rhizosphere?

• around the leaves of the plant

• around the roots of the plant

• around the grass of the plants

• around the soil of the plants