Indian Subcontinent Flashcards
What affects the monsoon season in India?
The seasonal changing pressure patterns and their effect on the prevailing winds
When and what is the cool dry season in India?
October-March.
Low temperatures over the continental land mass (Tibetan plateau) result in the formation of high pressure. Dry winds blow from the land to sea in North East direction
What is a retreating monsoon?
During the cool dry season, the north east winds travelling over the Bay of Bengal evaporate moisture from the Indian Ocean and bring precipitation to the southern peninsula and Sri Lanka
Temperatures from March to May in India?
Conditions are generally dry, temperatures begin to rise, by May the average temperatures can reach 32 degrees however the maximum temperatures are 40 degrees. These high temperatures cause the land mass to heat up and low pressure forms over the land. These signal the arrival of the monsoon.
When is the hot wet season?
From June to September, the high temperatures have created low pressure over the Tibetan Plateau. This is the wet season. In north east India, the Himalayas act as a barrier and cause relief rain.
Describe the physical features in India?
The Himalayas, the Ganges Plain, the Deccan Plateau and coastal plains
Describe the Himalayas
2500km in length, 40 to 50 million years old, formed in the alpine folding period, earthquakes and landslides are frequent, active glaciers
Describe the Ganges Plain?
Spreads from the Thar desert to the Ganges Delta, drained by the Ganges, deposition of alluvium due to flooding (sand, silt and clay).
Deccan Plateau
Triangular shaped, south of Ganges Plain, bordered by western and eastern Ghat mountains, lava flow formed by basalts creation the Plateau, drained by eastward flowing rivers
Four types of soils in India?
Alluvial soils, black soils, red soils, desert soils and laterite soils
What are alluvial soils
They are deposited by the river Ganges, they are found on the Ganges plain and eastern coastal plain. It is very fertile and good for agriculture. Rice, wheat, barely, cotton, sesame and maize are grown on this soil
What are black soils
They are formed by weathering of basalt in the Deccan Plateau, they have a high clay content which holds moisture very well, cotton and soybean are grown in this soil, fertile soil good for agriculture
What are laterite soils
They form in the monsoon climate, red in colour due to leaching which removes all minerals besides iron and alluvium, occurs in eastern and western ghat mountains, lacks fertility, once irrigated can grow tea and coffee
What are desert soils
Infertile, lacks moisture and humus, found in Thar desert, no plants grow
Explain the agriculture in India
Agriculture depends on the monsoon climate. Summer crops, called Kharif, such as cotton, rice and millet are planted in June and harvested in November. Winter crops, called Rabi, such as wheat and barley are planted in December and harvested in March
Rice in India
Requires an average temperature of 25 degrees Celsius. It Requires a lot of water, it is grown in Paddy fields, and basmati rice produced from the Ganges plain
Tea in India
Tea requires an average temperature of 20-30 degrees. It needs 1500-3000mm of rain per annum to grow. It is produced in well drained parts of north east India. Assam and Darjeeling are two types of teas produced
What are red soils?
They are formed by the weathering of igneous and metamorphic rocks such as gneiss from the Deccan plateau.
Why is water buffalo farmed instead of cows?
The cow is a sacred animal in India, therefore they farm water buffalo
Relief in India (7 points)
Where are upland pastures formed?
Areas of gently sloping land in the Himalayas form upland pastures where mixed crop and livestock farming take place, e.g water buffalo farming
Why were terraces constructed? And where?
Terraces constructed in the Himalayas allows for subsistence production of crops such as wheat and rice
What are south facing slopes good for?
They provide good growing conditions for fruit and vegetables
What does low-lying land on the Ganges plain facilitate?
It facilitates for the flooding of Paddy fields for rice cultivations