---
title: "Black Cotton Soil (Regur): Formation & Features"
description: "Black cotton soil, or regur, is a clay-rich soil in India known for its moisture retention, making it vital for cotton cultivation and UPSC studies."
url: "https://modeldiplomat.com/learn/glossary/black-cotton-soil"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- Black cotton soil, or regur, is a clay-rich, lime- and iron-bearing soil formed from weathered basaltic lava, noted for its high moisture retention and cracking when dry.
- Why is black cotton soil called regur, and what makes it black?
- What clay mineral gives black cotton soil its shrink–swell behaviour?
- How does black cotton soil differ from red soil?

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

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In its 2019–20 cotton assessment, the Cotton Corporation of India noted that the regur tracts of Maharashtra's Vidarbha region—Yavatmal and Amravati districts—remained the country's principal rainfed cotton belt despite recurrent monsoon stress.

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