Arid and Desert Soil and the Prevalent Regions

Desert soil is present in semi-arid and arid climates with limited rainfall. The sand present in the desert regions is partially blown from the Indus Valley and partly naturally occurring. The soil comprises 5-10% clay and 90-95 percent sand. The arid soil has a high phosphate level but a low nitrogen concentration. Consequently, it loses moisture and humus, and its water content is met solely by irrigation. This soil type is prevalent mainly in Rajasthan, spreading all the way to the Rann of Kutch and parts of Punjab and Haryana.

How does the Arid Soil form?

Arid or desert soil is also known as Aridisols. It is derived from the Latin term aridus, which means “dry,” and solum. This soil type develops in dry or semi-arid climates. Xeric shrublands and deserts, which cover around one-third of the Earth’s land area, are dominated by aridisols. It has a minimal organic matter concentration, indicating the scarcity of vegetative output on these arid soils. 

Furthermore, arid soils are derived from the disintegration of neighboring rocks and are primarily driven from the coastal regions and Indus Valley.The main distinguishing feature of arid soil is a lack of water. A significant maturity is also necessary to show subsurface development and erosion. 

Generally, in deserts, soil erosion occurs through water or wind. Water is the primary cause of erosion; however, the wind is the second cause. Nevertheless, in aridisols, restricted leaching frequently leads to forming one or more subsurface soil layers containing dissolved or suspended minerals. 

Features of Arid Soil

• These are naturally saline. The salt level in certain regions is so significant that ordinary salt is created by condensing the saline water.
• This soil lacks humus and nitrogen as a result of the dry environment, high temperatures, and increased evaporation.
• The iron and phosphate levels are normal.
• Chemical weathering is constrained.
• These soils are mineral-rich, but the primary restriction is a lack of water.
• The horizons in the soils are poorly formed.
• Plants are spread widely apart.

Chemical Composition 

• It is infertile because of its poor organic matter and low nitrogen content combined with extremely high phosphate levels and calcium carbonate.
• The presence of nitrogen in nitrates form and the presence of phosphates make it valuable in crop cultivation.
• Specific desert soil in India is alkaline, including various amounts of soluble salts such as calcium carbonate.
• The dry zone’s soils are sandy and sandy loamy in nature.
• The consistency and depth of the water vary depending on the topography.
• Many arid soils have a higher proportion of soluble salts within lower layers, making healthy water toxic.
• Calcium content rises downhill, with the subsoil having 10 times the calcium amount.
• These soils have the same phosphate concentration as conventional alluvial soils.

Regions Where Desert or Arid Soils are Present

Arid soil covers around 4% of India’s total land area.The desert soil in India is connected with sandy plains, sand dunes, playas, and gravelly pediments. These soils were formed in environments with little and unpredictable rainfall, high temperatures, and strong winds. As a result, the soils are primarily sandy, with minimal silt, clay, organic matter concentration, and an increased salt level. 

Arid soils are generally formed in western Rajasthan, which has arid terrain. It may be found in semi-arid and arid areas of Rajasthan, Haryana, and Punjab. The predominant south-west monsoon winds sweep the sand from the shore and Indus basin. Sandy soils with little clay content are also widespread along the coasts of Tamil Nadu, Odisha, and Kerala.

Agriculture on Arid Soil in India

Desert soil is generally deficient in nitrogen. However, it is an essential component for agricultural purposes. When these soils are adequately watered, they provide abundant harvests. In addition, these soils produce good agricultural returns when irrigated. 

The water that flows from the Indira Gandhi canal has altered the agricultural landscape of western Rajasthan’s dry soils. These soils are primarily used for growing bajra, guar, pulses, and other crops that require less water. As a result, shrubs and Cacti are the stable vegetation found in deserts because they are well suited to survive without water for extended periods.

Conclusion

These soils are often dark, light brown, or reddish. Because of the dry circumstances, soil leaching is essentially non-existent in arid soils, and evaporation is extremely quick. As a result, these soils are generally saline. To summarise, it was all about exploring desert soil or arid soil. A few of the most commonly asked questions are included here.