Natural Science

 Physical Geography of INDIA      India is the seventh largest country in the world and second largest country in Asia. It is separated by the Himalayas from the rest of the continent.       India accounts for about 2.4 % of the total area of the world with an area of 32,87,263 sq.km. many of the India states are larger than several countries of the world.  India’s Land and Water Frontiers:        India shares its 15,200 km long land frontier with Pakistan and Afghanistan in the north-west, China, Nepal and Bhutan in the north and Bangladesh and Myanmar in the east.        India’s longest border is with Bangladesh (4156 km)while the shortest border is with Afghanistan.(106 km) About 6,100 km long coastline of India is washed on three sides of the country by the Indian Ocean and its two arms namely the Arabian sea in the west and the Bay of Bengal in the east.       The total length o...

 Physical Geography of TAMILNADU Plateaus:      Plateaus of Tamil Nadu are located between the Western Ghats and the Eastern Ghats. It is roughly triangular in shape and covers an area of about 60,000 sq.km.       Bharamahal plateau is a part of the Mysore plateau situated in the northwestern part of Tamil Nadu. Its height ranges from 350 to 710 metres. Dharmapuri and Krishnagiri districts are located in this region.      Coimbatore plateau lies between the Nilgiris and Dharmapuri districts. Its height varies from 150 to 450 metres. This region includes Salem, Coimbatore and Erode districts. Moyar river separates this plateau from the Mysore plateau.  Rivers like Bhavani, Noyyal and Amaravathi, which originate from Western Ghats, form valleys in this region.            Many intermontane plateaus are found in the region of the Nilgiris. Sigur plateau is one such plateau.      ...

 Physical Geography of TAMILNADU Location and Size:      Tamil Nadu is one of the 28 states of India, located in the southern most part of the country.  It extends from 8°4'N to 13°35'N latitudes and from 76°18'E to 80°20'E longitudes. Its extremities are   in eastern - Point Calimere   in western - hills of Anaimalai   in northern - Pulicat lake   in southern - Cape Comorin       It covers an area of 1,30,058 sq.km and is the 11th largest state in India . It covers 4% of the area of our country. Boundaries and Neighbours:      Tamil Nadu is bounded by the Bay of Bengal in the east, Kerala in the west, Andhra Pradesh in the north, Karnataka in the northwest and Indian Ocean in the south. Gulf of Mannar and Palk Strait separate Tamil Nadu from the Island of Sri Lanka, which lies to the southeast of India. The state has 906.9 km long coastline, the third-longest in India after Gujarat and ...

 SBO Feedback SBO is a platform where we can earn money by doing a work in part time basis.    It is very good and user-friendly organisation for all the people.   It is more trustable and government approved organisation which gives more power to run successfully.   #SBO #SBOTVM #SBOGROUP #BUYMOTE #EDUQUEST #SBOFAKE #SBOSCAM #SBOFRAUD #SBOCHEATING #SBODIGITALMARKETING Buymote: https://play.google.com/store/apps/details?id=com.Buymote.buymas&pcampaignid=web_share Eduquest : https://eduquest.courses/

 WATER RESOURCES IN TAMILNADU      Water is the precious gift of nature to humankind and millions of other species living on the earth. Tamil Nadu constitutes 4% of India’s land area and is inhabited by 6% of India’s population, but has only 2.5% percent of India’s water resources. More than 95% of the surface water and 80% of the ground water have already been put into use.                                     Multipurpose River Valley Projects:      Multipurpose river valley projects are basically designed for the development of irrigation for agriculture and hydro power generation. However, they are used for many other purposes as well. Mettur Dam:      The Mettur Dam was constructed in a gorge, where river Cauvery enters the plains. It is one of the oldest dam in India. It provides irrigation to Salem, Erode, Karur, Tiruchirappalli, Thanj...

  IRRIGATION AND ITS TYPES:      Watering of agricultural plants through artificial means is called irrigation. Being a hot country with seasonal and irregular rainfall, it always needs irrigation to carry out agricultural activities during dry period.  Sources of Irrigation        In India, different sources of irrigation are used depending upon the topography, soils, rainfall, availability of surface or groundwater, nature of river (whether perennial or nonperennial), requirements of crops etc. The main sources of irrigation used in different parts of the country are Canal irrigation, Well irrigation and Tank irrigation a) Canal Irrigation:      It is the second most important source of irrigation in our country. Canals are the effective source of irrigation in areas of low level relief, deep, fertile soils, perennial source of water and extensive command area.  The canals are of two types:  1. Inundation Canals: I...