Hydroponics cultivation - online exam- CIA 2 II BBC Agro - Sem 3

1. Identify the given cultivation method of hydroponics

• NFT

• DFT

• Aeroponics

• Aggregate cultivation

2. What is the ideal water temperature for hydroponics cultivation

• 0-15⁰C

• 18-25⁰C

• 25-30⁰C

• 30-40⁰C

3. Inorganic artificial media used for hydroponics  

• Smoked rice husk , saw dust , peat moss

• Gravel culture

• Rock wool , perlite , vermiculite

• Both a and b

4.The nutrient solution replaced in non-circulating techniques when 

• Quantity of roots exposed to air

• Rapid growth of the root occurs

• Rapid growth of leaves occurs

• when pH changes occurs

5. What happens when pH varies in hydroponics system

• It produces insoluble precipitations

• It does not break into ionic form

• Loses the ability to absorb nutrients

• None

6.  The electrical conductivity of hydroponic indicates 

• The strength of nutrient solution

• The concentration of fertilizers

• The salt concentration

• The concentration of individual nutrient components

7. In which method an inert porous medium that moves water and fertilizer to the roots by capillary action

• NFT

• Aeroponics

• DFT

• Passive sub-irrigation

8. The EBB and flow hydroponic system is also known as

• Deep water culture

•         Static solution culture

         

         

• Flood and drain system

• None

9._________is very important in capillary action technique

• water quality

• media culture

• Both (a)and (b)

• aeriation

10. NFT system is used to cultivate

• Xerophytes

• Plants with small roots

• Plants with larger roots

• Hydrophytes