Geography

The sector suffers from low-scale, stagnating yields of inland and freshwater aquaculture, and poor infrastructure such as cold storage facilities, leading to an estimated 15-20 per cent post-harvest loss. The access to quality seed and feed for fish farming coupled with inadequate availability of credit makes the poor fisher communities not to invest in fish … Read more

When two large air masses meet, the boundary that separates them is called a front. Fronts represent fairly abrupt transitions between two large air masses.  This means that when two different bodies of air come together, they do not readily mix. Rather, each body of air will retain its individual properties, and a boundary forms … Read more

Climate is the average weather conditions of large area. According to the koeppen system of classification , the world is divided into five climatic groups and 13 climatic types based on the temperature, precipitation and vegetation. The notable characteristics of Monsoon type of climate are as follows: The climate is divided into distinct 4 seasons. … Read more

China China ranks first in the world in coal production. Nearly 38 per cent of world’s coal output is from China. All types of coal are found, including anthracite, bituminous coal and lignite. Although coal occurs in every province of China, but its greatest concentration is in Shanxi and Shaanxi (Shansi and Shensi).   USA … Read more

Tsunami is a Japanese word for “Harbour wave”. They are also known as seismic sea waves. They are very long-wavelength water waves in oceans or seas. They are commonly referred to as tidal waves because of long wavelengths, although the attractions of the Moon and Sun play no role in their formation. They sometimes come … Read more

It is a deflecting force experienced due to rotation of earth. Because of Coriolis the air appears to turn towards its right in the northern hemisphere and towards its left in the southern hemisphere. The coriolis always acts in the perpendicular direction of the motion ofair. It is zero at the equator and increases towards … Read more

Droughts and floods are the two accompanying features of Indian climate. According to some estimates, nearly 19 per cent of the total geographical area of the country and 12 percent of its total population suffer due to drought every year. About 30 percent of the country’s total area is identified as drought prone. Extreme Drought … Read more

Gondwana coal makes up to 98 per cent of the total reserves and 99 per cent of the production of coal in India. Satpuras, denudation [weathering + erosion] has exposed coal bearing Gondwana strata.The carbon content in Gondwana coal [250 million years old] is less compared to the  Carboniferous coal [350 million years old][Almost Absent in India] because of its much … Read more

Normally, temperature decreases with increase in elevation. It is called normal lapse rate. At times, the situations is reversed and the normal lapse rate is inverted. It is called Inversion of temperature. Inversion is usually of short duration but quite common nonetheless. A long winter night with clear skies and still air is ideal situation … Read more

Geographical distribution: The cool temperate eastern margin climate is an intermediate type of climate between the British and the Siberian type of climate. It has features of both the maritime and continental type of climate. The laurentian type of climate is found only in two regions. One is north eastern North America and the other … Read more