ASSESSMENT 2_HORTI 2, Part 3

What is the ideal pH range for most of the crops in hydroponics?

• 3.5-4.5

• 5.5-6.0

• 6.5-7.0

• 7.5-8.0

What does EC stands for in hydroponics?

• Essential Components

• Electric Current

• Electrical Conductivity

• Evaporative Cooling

Which of the following is the main disadvantage for hydroponics?

• High Initial costs

• Water pollution

• Labor intensive

• Time consuming

What is the nutrient film technique?

• A movie about hydroponics

• A method where roots are suspended in a nutrient solution

• A method where a thin film of nutrient solution flows over the roots

• A method of filming the plants

What is the main source of nutrients for plants in hydroponics?

• Air

• Nutrient Solution

• Water

• Growing medium

What is deep water culture?

• A method where plants are grown in deep soil

• A method where plants are grown in deep water

• A method where plants are culture underwater

• A method where plants are grown in shallow water

Why light is significant in crop production?

• It needed for flowering of the plants

• It is essential for photosynthesis

• It warms the plants

• It keeps the plants dry and clean

How do you control pH level in hydroponics?

• By changing the light intensity

• By adjusting the nutrient solution

• By watering the plants

• By adding lime stone

How do you neutralize soil pH in crop production?

• By changing the light intensity

• By adjusting the nutrient solution

• By watering the plants

• By adding lime stone

What is the purpose of aeration in hydroponics?

• To provide oxygen in water

• To mix nutrients in water

• To decrease water temperature

• To increase pH level