Deficiency symptoms of nitrogen and potassium are visible first in (A) Buds (B) Senescent leaves (C) Young leaves (D) Roots

Options

A. Buds
B. Senescent leaves
C. Young leaves
D. Roots

Answer

To determine where the deficiency symptoms of nitrogen and potassium are first visible, we can analyze the options provided:

1. **Understanding Nutrient Deficiencies**:
- Nitrogen and potassium are essential macronutrients for plant growth.
- Deficiencies in these nutrients lead to specific symptoms in plants.

2. **Analyzing Each Option**:
- **(A) Buds**: Buds are typically not the first to show deficiency symptoms since they are still developing and rely on the nutrients stored in other parts of the plant.
- **(B) Senescent leaves**: These are older leaves that are naturally aging. Deficiency symptoms often appear here first as the plant reallocates nutrients from older leaves to newer growth.
- **(C) Young leaves**: Young leaves are usually the last to show deficiency symptoms because they are actively growing and may receive nutrients preferentially.
- **(D) Roots**: Roots may also show signs of nutrient deficiency, but visible symptoms are generally not as apparent as in leaves.

3. **Conclusion**:
- Based on the analysis, deficiency symptoms of nitrogen and potassium are first visible in **(B) Senescent leaves**. This is because older leaves are the first to exhibit signs of nutrient deficiency as the plant prioritizes the growth of new leaves.

**Final Answer**: (B) Senescent leaves

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