BharatNotes Salinisation
nounUsage in a UPSC answer
Across the irrigated belts of Punjab and Haryana, decades of canal-fed over-watering without adequate drainage have driven the salinisation of once-fertile farmland, hollowing out agricultural productivity and underscoring why any sustainable-development strategy must treat soil health as a non-negotiable pillar of food security.
Synonyms
Antonyms
Word Family
saline (adj/n), salinity (n), salinise (v), salinised (adj), salinometer (n)
Root
Latin sal = salt; salinus = of or pertaining to salt; -isation = process/action suffix (French via Latin -isatio)
Etymology
From Latin salinus ("of salt", from sal, "salt") + -isation; soil salinisation has been a challenge since the earliest irrigated civilisations -- the decline of ancient Mesopotamian agriculture is partly attributed to salinisation caused by poor irrigation practices over millennia.
Memory Hook
Hear "saline" (the salt drip at a hospital) inside salin-isation — it is land getting put on a salt "drip" until the soil turns briny and barren.
How This Word Works in UPSC Writing
The accumulation of soluble salts in the soil profile to levels that impair plant growth. The mechanism repays stating because it is counter-intuitive: irrigation water always carries dissolved salts, and when that water evaporates or is transpired the salts remain behind, so salinisation is a consequence of irrigation itself unless drainage removes the excess, which is why it appears most severely in the best-irrigated tracts rather than the driest ones. Waterlogging accelerates it by raising the water table until capillary action draws saline groundwater to the surface, and coastal areas face a separate pathway in seawater intrusion where over-extraction lowers the freshwater head. The distinction between saline and sodic soils determines the remedy and is directly examinable: saline soils carry excess neutral salts and are reclaimed by drainage and leaching, whereas sodic or alkaline soils have excess exchangeable sodium which disperses clay and destroys structure, and they require a calcium amendment such as gypsum before leaching will work at all.
Don’t Confuse It With
Saline soils carry excess neutral soluble salts and are reclaimed by drainage and leaching, whereas sodic or alkaline soils hold excess exchangeable sodium that disperses clay and ruins structure, and need gypsum before leaching can help. Waterlogging raises the water table and drives the capillary rise of salts, so the two problems usually appear together. Leaching washes salts downward and is the remedy here, the reverse of its role as a degradation process in humid soils. Seawater intrusion is the coastal pathway, driven by over-extraction of groundwater.
Hindi Meaning
लवणीकरण (lavanīkaran); क्षारीयता (kshārīyatā) for sodicity or alkalinity.
Common Questions
- Why does irrigation cause salinisation?
- Irrigation water carries dissolved salts, and when the water evaporates or is transpired the salts remain in the soil, so they accumulate unless drainage carries the excess away.
- What is the difference between saline and sodic soils?
- Saline soils have excess neutral salts and can be reclaimed by drainage and leaching, while sodic soils have excess exchangeable sodium that destroys structure and require gypsum before leaching will work.
Tip: press Alt+S to hear pronunciation
