Bhangar Soil

What exactly is Bhangar soil, and why does it never get refreshed?

Bhangar is the older alluvial soil of India’s Gangetic plains. It sits on terraces roughly 30 metres above the level of annual river floods, safely out of reach of the silt those floods carry. Here’s why that matters so much: once a terrace rises above flood level, it stays that way for good. No natural process ever brings it back down, so Bhangar just keeps ageing in place.

• Not one uniform layer: Bhangar isn’t a single, simple layer. It varies in colour, texture, and depth across the plain, genuinely predating the newest riverbank silt by a considerable stretch of geological time.
• A doab feature too: Bhangar terraces are common in doabs, the land between two rivers. These interfluve areas rarely see direct flooding, which is exactly why they stayed high and dry long enough to become Bhangar.
• Where it spreads: Bhangar tracts run across Haryana, Uttar Pradesh, and Bihar, covering most of the older, higher terraces of the Ganga plain. This spread makes it one of North India’s most widespread soil types overall.

What is kankar, and why does it mark a soil as Bhangar?

Bhangar contains kankar in its subsoil, irregular nodules of impure calcium carbonate. Here’s why it’s so useful for identification: kankar is the single clearest sign a soil sample is Bhangar, not Khadar. If a question ever mentions kankar nodules, it is almost certainly describing Bhangar.

• A local building material: farmers historically dug up kankar for use as a cheap building material, and also used it for rough local road surfacing.
• Kankar lime: burning kankar produces a rough form of lime, which builders once used widely as a basic mortar ingredient.

Why is Bhangar generally less fertile than Khadar?

Bhangar is less fertile than Khadar, the newer alluvial soil found closer to riverbanks. Here’s the real cause: its lower fertility comes from a lack of fresh silt, since floods, which deposit new nutrients, never reach it. Without that yearly top-up, Bhangar soil often runs low on nitrogen, and its organic matter also tends to decline over centuries. Farmers must add both back through fertiliser.

What does Bhangar’s surface actually feel and look like?

Bhangar’s texture is generally coarser than Khadar’s, mixing clayey and sandy loam with calcareous deposits, and it often looks darker than Khadar too, a colour shift caused by long exposure and mineral build-up over time. That firmer, calcareous texture can make it harder to plough than the looser, silty Khadar soil.

• Salt crusts form too: in drier regions, Bhangar soil can show saline and alkaline efflorescence, a crusty surface deposit of salts locally called reh or kallar. It makes affected patches unfit for most crops.
• Fixed with gypsum: farmers can treat this salty crust with gypsum, a chemical treatment that helps restore the land over time. State governments in North India run dedicated programmes to reclaim this salt-affected land, treating it as a real farming priority.

How do kankar nodules actually form, given enough time?

Kankar nodules form through leaching: lime dissolves in the topsoil, then re-precipitates lower down, over long stretches of time. Here’s why that slowness matters: this leaching process needs many centuries to produce visible nodules, which is exactly why kankar marks genuinely old soil. Seasonal rainfall drives the cycle, carrying dissolved lime downward each monsoon before it settles deeper.

• Left behind by shifting rivers: Bhangar formed when older river deposits were stranded above flood level, as river courses shifted or land slowly rose over centuries. Slow tectonic uplift can also raise land above flood reach, adding another possible route to becoming Bhangar terrain.
• A natural clock: geologists can use kankar depth and density to estimate roughly how old a terrace actually is, since its presence signals soil left undisturbed for a very long stretch.

Can Bhangar land still be farmed well today?

Farmers still cultivate Bhangar land, despite its lower fertility. This depends more on irrigation and fertiliser use than on natural flood renewal. Here’s why tube wells changed everything: the spread of tube-well irrigation transformed many Bhangar tracts, letting farmers grow crops without waiting on floods at all. Wheat, gram, and mustard grow well on well-managed Bhangar land, since these crops tolerate its firmer, less silty texture.

• A genuine trade-off: Bhangar and Khadar show how the same river system can produce two very different soils. Khadar farmers got better soil but faced real flood risk; Bhangar farmers got safety but had to work harder for fertility.
• Shaping settlement patterns: older villages often sit on Bhangar ground, safely above flood level, with farmland extending down into the richer Khadar tracts nearby.

How is Uttar Pradesh reclaiming its driest Bhangar-type land in 2025?

Uttar Pradesh approved ₹125.52 crore for the Pandit Deendayal Upadhyay Kisan Samriddhi Yojana in 2025-26, a scheme that reclaims barren, ravine, and waterlogged land. The state targets 43,850 hectares for the year, out of 24.11 lakh hectares of problematic land it currently holds. Work includes contour bunding, land levelling, and drainage construction, mainly helping small and marginal farmers. Here’s why it belongs here: much of this “problematic” upland is exactly the drier, less fertile Bhangar terrain this article describes, showing the fertility gap is a live policy problem today, not just a textbook fact. (Source: Hindustan Times, June 28, 2025)