A soil is highly deficienty in nitrigen . The crop requires nitrogen for immediate requirement as well as long term requirement . Which among the following is the most suitble fertilizer for the soil ?

Options

A. Urea
B. Ammonium sulphate
C. Ammonium nitrate
D. Calcium ammonium nitrate

Explanation

To determine the most suitable fertilizer for soil that is highly deficient in nitrogen and where the crop requires nitrogen for both immediate and long-term needs, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Nitrogen Requirement**:
- The soil is deficient in nitrogen, which is crucial for plant growth. Nitrogen is needed for the synthesis of proteins and nucleic acids, which are essential for plant development.

2. **Understand Immediate vs. Long-term Requirements**:
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