ASP Lesson 2.2 Soil Chemistry

A chemical term referring to a basic reaction where the pH reading is above 7, as distinguished from acidic reaction where the pH reading is below 7.

• Acid

• Alkaline

• Base

• Buffer

A substance containing hydrogen that dissociates to form hydrogen ions when dissolved in water. Term applied to any substance with a pH less than 7.0.

• Acid

• Alkaline

• Base

• Buffer

A substance used to resist change in pH.

• Acid

• Alkaline

• Base

• Buffer

A substance which gives off hydroxyl ions when dissolved in water, as contrasted with an acid, which gives off hydrogen ions.

• Acid

• Alkaline

• Base

• Buffer

An electronic device used to measure electrical conductivity

• Conductivity

• Conductivity tester

• Electrical conductivity

• Fertilize

The property or power of conducting heat, electricity, or sound.

• Conductivity

• Conductivity tester

• Electrical conductivity

• Fertilize

To supply the necessary mineral and organic nutrients to soil or water to aid the growth and development of plants.

• Conductivity

• Conductivity tester

• Electrical conductivity

• Fertilize

A measurement in hydroponics used to determine the amount of nutrients in a solution that is available to a plant.

• Conductivity

• Conductivity tester

• Electrical conductivity

• Fertilize

A colorless, odorless, flammable gas, the lightest of the elements that combine chemically with oxygen to form water.

• Gypsum

• Hydrogen

• Hydroxyl

• Ion

A mineral calcium sulfate, combined with water of hydration. In arid regions, large tonnages are used to treat sodic soils.

• Gypsum

• Hydrogen

• Hydroxyl

• Ion