Hydroponics

Which of the following is not utilized by hydroponics?

• Soil

• water

• Sunlight

• Nutrients

Which of the following is not a macro-nutrient?

• Nitrogen

• Boron

• Potassium

• Sulfur

Which of the following is provided to hydroponic plants by artificial growth mediums?

• Nutrients and water

• Nutrients and stability

• Support and water

• Support and stability

Which of the following is a specialty plant suitable for hydroponic productions.

• Tree

• Shrubs

• Fruits

• Cacti

Which of the following figures represents the value of the hydroponics industry?

• Four billion

• Eight billion

• Nine billion

• Six billion

Which of the following is the simplest form of hydroponic systems?

• Aeroponic systems

• Passive system

• Aggregate system

• Continuous flow system

Which of the following is a continuous flow systems which use flexible plastic tubing supported by wooden trays to hold plants and provide a continuous flow of nutrient solutions as they grow?

• Nutrient film technique systems

• Gravity feed system

• Manual gravity feed system

• Sub irrigation system

Where is the sub-irrigation system reservoir most often located?

• Beside the aggregate bed

• Above the aggregate bed

• Below the aggregate bed

• Inside the aggregate bed

Aeroponic systems must provide which of the following percentages of humidity to plants?

• 75 percent

• 77 percent

• 25 percent

• 100 percent

Which of the following is NOT a active system?

• PVC pipe system

• Gravity flow system

• Pipe dream system

• Nutrient film technique systems