The largest part of the northern plain is formed of older alluvium. It lies above the floodplains of the rivers and presents a terracelike feature. This part is known as bhangar. The soil in this region contains calcareous deposits, locally known as kankar. The newer, younger deposits of the floodplains are called khadar. They are renewed almost every year and so are fertile, thus, ideal for intensive agriculture.

North Indian Plains _{Image Courtesy: Wikipedia}

This video tells us about the divisions of the North Indian plains.

Some of the learners also asked:
What is the significance of Khadar soils?