Hydroponics PRE-ASSESSMENT

What is hydroponics?

• Growing plants in soil
• Growing plants in water only
• Growing plants in a liquid nutrient solution with or without artificial media
• Growing plants in sand

Which of the following is NOT a commonly used medium in hydroponics?

• Expanded clay
• Coir
• Perlite
• Topsoil

Who first used the term 'hydroponics' and when?

• Dr. Gericke in 1929
• U.S. Army in World War II
• Commercial farms in the 1950s
• Greek philosophers in ancient times

Which is NOT listed as an advantage of hydroponics?

• Faster plant growth
• Higher crop yields
• Lower initial costs
• No weeding required

What is a disadvantage of hydroponics?

• Slower plant growth
• Lower crop yields
• Higher initial and operational costs
• More weeding required

Which of these is NOT a type of liquid hydroponic system mentioned?

• Nutrient film technique (NFT)
• Deep water culture
• Aeroponics
• Soil-based hydroponics

What material is rockwool made from?

• Recycled plastic
• Ground-up basalt rock
• Coconut fiber
• Shredded wood

In a passive hydroponic system, how is water drawn to the plant roots?

• Through a pump
• By capillary action
• By gravity
• Through pressurized mist

Which hydroponic system is described as the simplest of all active systems?

• Wick System
• Water Culture System
• Ebb and Flow System
• Drip System

In the Ebb and Flow System, what controls the flooding and draining of the grow tray?

• A manual valve
• Gravity
• A timer
• Plant roots