Name the equipment used to measure rate of growth of short length plant.

Answer

### Step-by-Step Solution:

1. **Identify the Equipment**: The equipment used to measure the rate of growth of short-length plants is called an **Oxanometer**.

2. **Understanding the Name**: The term "Oxanometer" can be broken down into two parts: "Oxano" refers to growth, and "meter" refers to measurement. Thus, it is a device for measuring growth.

3. **Description of the Oxanometer**: The Oxanometer consists of several components:
- A **thread** that is tied to the tip of the plant.
- A **pulley** over which the thread passes.
- A **weight** attached to the other end of the thread.
- A **needle** positioned in the center of the pulley that indicates growth.

4. **How it Works**:
- As the plant grows, the tip of the plant moves upward, causing the thread to pull on the weight.
- This movement results in a deflection of the needle.
- The deflection can be read on a graduated arc, which indicates the increase in the length of the plant.

5. **Conclusion**: The Oxanometer is an effective instrument for measuring the growth of plants in terms of their length, providing a direct reading of growth through the deflection of the needle.