Who proved for the first time that the plants contains a large number of minerals and microelements?

Options

A. De saussure (1904)
B. Leibeg (1840)
C. Glauber and Mayhn (1650)
D. Arnon and stout (1939)

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks who was the first to prove that plants contain a large number of minerals and microelements.

2. **Evaluating the Options**: The question provides several names as options. We need to analyze each one to find the correct answer.

3. **Analyzing the First Option (Saucer)**: The first option is Saucer. This individual is associated with linguistic theory, which does not relate to mineral nutrition in plants. Therefore, this option is incorrect.

4. **Analyzing the Second Option (Liebig)**: The second option is Liebig. He is known for his contributions to agricultural chemistry, particularly in analyzing organic compounds in fertilizers. However, he is not specifically credited with proving the presence of minerals and microelements in plants. Thus, this option is also incorrect.

5. **Analyzing the Third Option (Glover and Nehan)**: The third option is Glover and Nehan. These individuals are associated with quantum physics, which does not pertain to plant mineral nutrition. Hence, this option is incorrect as well.

6. **Analyzing the Fourth Option (Aran and Stout)**: The final option is Aran and Stout. They are recognized for establishing criteria for the essentiality of minerals and micronutrients in plants. They outlined several criteria that must be met for an element to be considered essential for plant growth, making this option the correct answer.

7. **Conclusion**: The correct answer to the question is Aran and Stout, as they were the first to prove the presence of a large number of minerals and microelements in plants.

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