Maryland mammoth variety of tobacco is a

Options

A. SDP
B. LDP
C. DNP
D. Short-long day plant

Answer

**Step-by-Step Solution:**

1. **Identify the Variety of Tobacco**: The question asks about the Maryland Mammoth variety of tobacco.

2. **Understand Plant Categories**: There are different categories of plants based on their light requirements:
- Short day plants: Require longer periods of darkness (more than 12 hours) to flower.
- Long day plants: Require shorter periods of darkness (less than 12 hours) to flower.
- Day neutral plants: Flower regardless of the length of day or night.
- Short-long day plants: Can flower under both short and long day conditions.

3. **Determine the Light Requirement for Maryland Mammoth**: According to the information provided, the Maryland Mammoth variety of tobacco is classified as a short day plant. This means it requires a longer uninterrupted dark period to initiate flowering.

4. **Specify the Minimum Dark Period**: For the Maryland Mammoth tobacco to flower, it requires a minimum dark period of 10 hours. This aligns with the characteristics of short day plants.

5. **Select the Correct Option**: Based on the understanding that Maryland Mammoth is a short day plant, the correct answer to the question is the first option: short day plant.

**Final Answer**: The Maryland mammoth variety of tobacco is a **short day plant**.

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