Which of the following statements is incorrect regarding the phosphorus cycle?

Options

A. phosphates are the major form of phosphorus reservoir
B. phosphorus solubilising bacteria facilitate the release of phosphorus from organic remains
C. there is appreciable respiartory release of phosphorus into atmosphere
D. It is sedimentary cycle

Answer

To determine which statement is incorrect regarding the phosphorus cycle, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding the Phosphorus Cycle**:
- The phosphorus cycle is a biogeochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere. Phosphorus is primarily found in sedimentary rocks and is released into the soil and water through weathering processes.

2. **Analyzing the Options**:
- **Option 1**: "Phosphorus are major form of phosphorus reservoirs."
- This statement is true. Phosphorus is found in significant amounts in the earth's crust, primarily in the form of phosphate rocks.

- **Option 2**: "Phosphorus solubilize bacterium lysing bacteria facilitate the release of phosphorus from organic remains."
- This statement is also true. Decomposing bacteria break down organic matter, releasing phosphorus back into the soil and making it available for plant uptake.

- **Option 3**: "There is appreciable respiratory release of phosphorus in atmosphere."
- This statement is incorrect. Phosphorus does not enter the atmosphere through respiration. It primarily cycles through soil and water, and is not gaseous like carbon or nitrogen. Phosphorus is found in sedimentary forms and is not released into the atmosphere through respiratory processes.

- **Option 4**: "It is a sedimentary cycle."
- This statement is true. The phosphorus cycle is indeed classified as a sedimentary cycle since phosphorus is mainly found in sedimentary rocks and is not gaseous.

3. **Conclusion**:
- The incorrect statement regarding the phosphorus cycle is **Option 3**: "There is appreciable respiratory release of phosphorus in atmosphere."

### Final Answer:
The incorrect statement regarding the phosphorus cycle is: **"There is appreciable respiratory release of phosphorus in atmosphere."**

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