Step 1: Understanding the Concept:
Surface irrigation (such as flooding, furrow, and border irrigation) involves applying water across the soil surface by gravity.
It is the dominant irrigation method in developing countries like India.
Detailed Explanation:
Let us analyze the statements:
- Assertion (A) analysis: Surface irrigation remains the most common and oldest method in India, covering over $85\%$ of the total irrigated area. Due to socioeconomic factors, it is expected to continue dominating Indian agriculture. Thus, Assertion (A) is correct.
- Reason (R) analysis: Most Indian farmers have small landholdings and limited capital. Surface irrigation does not require expensive pressurized pipe networks or electricity. It is easy to operate, traditional, and cost-effective to set up. Thus, Reason (R) is correct.
- Evaluating the connection: Since the ease of operation, low cost, and traditional familiarity (R) are the primary reasons why farmers continue to use and rely on surface irrigation (A), (R) is the correct explanation of (A).
Step 2: Final Answer:
Both (A) and (R) are correct, and (R) is the correct explanation of (A). This corresponds to Option (A).