Barrages have helped convert which type of land into fertile and productive areas?

Barrages have helped convert which type of land into fertile and productive areas?

بیریز نے کس قسم کی زمین کو زرخیز اور پیداواری علاقوں میں تبدیل کرنے میں مدد کی ہے؟
Explanation

Barrages control river water and divert it for irrigation.

This helps convert barren land into fertile and productive agricultural areas.