Consider the following statements in reference to green manure and select the incorrect statement using the codes given below :
(A) Green manure is rich in organic matter and nutrients.
(B) Green manure is primarily used to enrich the soil in phosphorus.
(C) Green manure is the undecomposed plant material.
Codes :

Question

Consider the following statements in reference to green manure and select the incorrect statement using the codes given below : 
(A) Green manure is rich in organic matter and nutrients. 
(B) Green manure is primarily used to enrich the soil in phosphorus. 
(C) Green manure is the undecomposed plant material. 
Codes :

Accepted Answer

Option 4 is the correct answer because statement (B) is incorrect. Let's analyze each statement to understand why this is the case:

1. **Statement (A): "Green manure is rich in organic matter and nutrients."**
   - This statement is correct. Green manure consists of plants that are grown specifically to be plowed back into the soil. These plants are rich in organic matter and nutrients, which help improve soil fertility and structure. They add essential nutrients like nitrogen, which are crucial for plant growth.

2. **Statement (B): "Green manure is primarily used to enrich the soil in phosphorus."**
   - This statement is incorrect. While green manure can contribute to the overall nutrient content of the soil, it is primarily used to enrich the soil with nitrogen rather than phosphorus. Leguminous plants, commonly used as green manure, have the ability to fix atmospheric nitrogen into the soil, significantly enhancing its nitrogen content. Phosphorus enrichment is not the primary function of green manure.

3. **Statement (C): "Green manure is the undecomposed plant material."**
   - This statement is correct. Green manure refers to plant material that is grown and then incorporated into the soil before it decomposes. The process of decomposition occurs in the soil, where the plant material breaks down and releases nutrients.

Now, let's examine why the other options are incorrect:

- **Option 1 (A and B):** This option is incorrect because statement (A) is correct, but statement (B) is incorrect.
- **Option 2 (B and C):** This option is incorrect because statement (C) is correct, but statement (B) is incorrect.
- **Option 3 (C and A):** This option is incorrect because both statements (C) and (A) are correct.

In conclusion, Option 4 is the correct choice because it correctly identifies statement (B) as the incorrect statement regarding green manure.