The technique of culturing plants in nutrient solutions is known as .....

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of the technique used for culturing plants in nutrient solutions.

2. **Identifying the Technique**: The technique that fits this description is one where plants are grown without soil, and their roots are immersed in a nutrient-rich solution.

3. **Defining the Technique**: This method is known as hydroponics. In hydroponics, plants receive all the necessary nutrients directly from the water solution, allowing for growth without the need for soil.

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