Question 10 of 17intermediate🔍 AnalyzeShort Answer4 marks

Make a comparative chart for DWC vs NFT systems—you can compare aspects such as ease of construction, plant growth, etc.

Correct Answer

The DWC system uses a bucket or tub as a water reservoir with plant roots suspended in standing water. It requires an aerator for dissolved oxygen and uses horizontal space. This system is easier to construct with simple materials like buckets and styrofoam sheets.

The NFT system uses PVC pipes with holes for net pots, where water flows as a thin film near roots. It does not require an aerator due to continuous water flow and allows vertical stacking to utilise vertical space. This system can accommodate more plants with less water.

DWC is simpler to build but limited in capacity, while NFT is more complex but more efficient for larger-scale production.

Exercise: Activity 5: Building a hydroponic system using Nutrient Film Technique (NFT) | Q: 2 | (Page Page 24)
For More Understanding

Explanation

The chapter describes DWC on Pages 19-21 as using standing water with roots suspended, requiring aerators, and using horizontal space. NFT on Pages 22-24 uses flowing water in pipes, allows vertical stacking, and does not need aerators due to continuous water flow providing dissolved oxygen naturally.

Solution Steps

  1. DWC system uses a bucket or tub as a water reservoir with roots suspended in standing water.

  2. DWC requires an aerator for dissolved oxygen and uses horizontal space.

  3. DWC is easier to construct with simple materials like buckets and styrofoam sheets.

  4. NFT system uses PVC pipes with water flowing as a thin film near roots.

  5. NFT does not require an aerator and allows vertical stacking to utilise vertical space.

  6. NFT accommodates more plants with less water and is efficient for larger-scale production.

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