The concentration of a macroelement per gm of dry matter in plants is at least

Options

A. 1000 `mu g`/gm of dry matter
B. 100 `mu g`/gm of dry matter
C. 1500 `mu g`/gm of dry matter
D. 995 `mu g`/gm of dry matter.

Answer

To solve the question regarding the concentration of a macroelement per gram of dry matter in plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Elements in Plants**:
- Plants require various elements for growth, which can be categorized into two types: macroelements and microelements.
- Macroelements are needed in larger quantities, while microelements are required in smaller amounts.

2. **Define Macroelements**:
- Macroelements include essential nutrients such as nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur.
- These elements are crucial for various physiological and biochemical processes in plants.

3. **Determine the Concentration of Macroelements**:
- The question specifically asks for the concentration of macroelements per gram of dry matter.
- It is established that the minimum concentration of macroelements required in plants is 1,000 micrograms per gram of dry matter.

4. **Conclusion**:
- Therefore, the concentration of a macroelement per gram of dry matter in plants is at least **1,000 micrograms**.

### Final Answer:
The concentration of a macroelement per gram of dry matter in plants is at least **1,000 micrograms**.

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