Which of the following medium is NOT used in the growth of hydrophonic plants ?

Options

A. Minerals
B. Water
C. Light
D. Soil

Answer

To determine which medium is NOT used in the growth of hydroponic plants, we need to first understand what hydroponics is and the types of mediums typically used in this method of cultivation.

### Step 1: Understand Hydroponics
Hydroponics is a method of growing plants without soil, using nutrient-rich water instead. This system allows for better control over nutrient availability and can lead to faster plant growth.

**Hint:** Remember that hydroponics relies on water and nutrients, not soil.

### Step 2: Identify Common Hydroponic Mediums
Common mediums used in hydroponics include:
- **Rockwool:** A popular choice due to its excellent water retention and aeration properties.
- **Coconut Coir:** Made from coconut husks, it is biodegradable and retains moisture well.
- **Perlite:** A volcanic glass that improves aeration and drainage.
- **Clay Pellets:** Lightweight and provide good drainage and aeration.

**Hint:** Think about materials that retain moisture and provide aeration for roots.

### Step 3: Identify Non-Hydroponic Mediums
Now, we need to identify mediums that are typically NOT used in hydroponics. One such medium is:
- **Soil:** Traditional soil is not used in hydroponics as it does not allow for the same level of control over nutrients and can introduce pests and diseases.

**Hint:** Soil is the primary growing medium in traditional agriculture, not hydroponics.

### Step 4: Conclusion
Based on the information gathered, the medium that is NOT used in the growth of hydroponic plants is **soil**.

**Final Answer:** Soil is NOT used in the growth of hydroponic plants.