---
title: "Black Cotton Soil (Regur): Origin & UPSC Notes"
description: "Black cotton soil, or regur, is a moisture-retentive clay ideal for cotton cultivation, formed from weathered Deccan basaltic lava."
url: "https://modeldiplomat.com/learn/glossary/black-cotton-soil-regur"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- Black cotton soil, known as regur, is a clayey, lime- and iron-rich black soil formed from weathered Deccan basaltic lava that swells when wet and cracks when dry.
- Why is black cotton soil called regur and why is it black?
- What makes regur ideal for cotton but difficult for construction?
- How does black cotton soil differ from laterite soil?
- Which Indian states have the largest extent of black cotton soil?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

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In the 2020s the Cotton Corporation of India conducted minimum-support-price procurement across the regur-rich Vidarbha belt of Maharashtra, where rain-fed cotton on black cotton soil dominates the agrarian economy around Nagpur and Amravati.

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