- The text mentions that the main concentration of canal irrigation is in the northern plain of India (Uttar Pradesh, Haryana, Punjab).
- Well irrigation is more popular where groundwater is ample (eastern UP, Bihar).
- Tank irrigation is more suitable in the peninsular plateau area (Andhra Pradesh, Tamil Nadu).
- This indicates significant regional disparities in irrigation coverage and methods.
- The text also states that enhancing access to irrigation is a potent instrument to raise agricultural productivity.