Who at first demonstrated that plants can be grown to maturity in a defined soil less culture :

Options

A. J.V. Sachs
B. Knoop
C. Skoog
D. Hoagland

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks who first demonstrated that plants can be grown to maturity in a defined soilless culture.

2. **Identifying the Technique**: The technique referred to in the question is known as hydroponics. Hydroponics is a method of growing plants without soil, where the roots are suspended in a nutrient-rich water solution.

3. **Historical Context**: The hydroponics technique began as a way to study plant nutrition scientifically. It allows plants to grow in a controlled environment with nutrients directly available to them.

4. **Identifying the Scientist**: The scientist who first demonstrated this technique was Julius von Sachs. He was a German botanist who conducted his experiments in the year 1860.

5. **Conclusion**: Based on the information gathered, the correct answer to the question is **Julius von Sachs (J.V. Sachs)**.

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