Which is the least efficient irrigation method - A Comparative Analysis

Irrigation is a critical process to ensure the survival and growth of crops in agriculture. A suitable irrigation system is necessary to deliver water to plants when there is a shortage of rainfall. However, some irrigation systems are more effective than others - which irrigation system is least efficient?

1. Flood Irrigation:

2. Furrow Irrigation:

3. Sprinkler Irrigation:

4. Drip Irrigation: