Abbreviation NPK means .....

Explanation

**Step-by-Step Solution:**

1. **Understanding the Abbreviation NPK**: The abbreviation NPK refers to three essential nutrients that are crucial for plant growth.

2. **Identifying Each Component**:
- **N** stands for **Nitrogen**: This nutrient is vital for the growth of plants as it is a key component of amino acids, proteins, and chlorophyll.
- **P** stands for **Phosphorus**: This nutrient plays a significant role in energy transfer, photosynthesis, and nutrient transport within the plant.
- **K** stands for **Potassium**: This nutrient is important for various physiological processes, including water regulation, enzyme activation, and overall plant health.
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