By the process of leaching ,……..... nutrients go down into the soil horizon and get precipitated .

Options

A. water soluble , inorganic
B. water insoluble, inorganic
C. water soluble, organic
D. water insoluble, organic

Answer

To solve the question regarding the process of leaching and the types of nutrients that go down into the soil horizon and get precipitated, we can break it down step by step:

### Step-by-Step Solution:

1. **Understanding Leaching**:
- Leaching is the process where water-soluble substances are washed out from the upper layers of the soil and move down into the soil horizon. This process can involve nutrients, fertilizers, and other soluble materials.

**Hint**: Remember that leaching involves the movement of substances due to water flow.

2. **Identifying Solubility**:
- For a substance to be leached, it must be soluble in water. This means that only those nutrients that can dissolve in water will be able to move down through the soil layers.

**Hint**: Think about which nutrients can dissolve in water and which cannot.

3. **Types of Nutrients**:
- Nutrients can be categorized into two main types based on their solubility:
- **Water-soluble nutrients**: These include many inorganic nutrients (like nitrates and phosphates) that can easily dissolve in water.
- **Water-insoluble nutrients**: These are typically organic compounds or certain minerals that do not dissolve in water and therefore cannot be leached.

**Hint**: Consider the difference between inorganic and organic nutrients in terms of their solubility.

4. **Analyzing the Options**:
- The question provides options regarding the types of nutrients that leach:
- Water soluble inorganic
- Water insoluble inorganic
- Water soluble organic
- Water insoluble organic
- From the analysis, we can conclude:
- **Water soluble inorganic**: Correct, as these can leach.
- **Water insoluble inorganic**: Incorrect, as these cannot leach.
- **Water soluble organic**: Incorrect, as while some organic substances are soluble, many are not.
- **Water insoluble organic**: Incorrect, as these cannot leach.

**Hint**: Evaluate each option based on the criteria of solubility in water.

5. **Conclusion**:
- The correct answer is **water soluble inorganic nutrients**, as they are the ones that can be leached down into the soil horizon and eventually precipitate.

### Final Answer:
- The correct option is **water soluble inorganic** nutrients.