Geography

The following factors affect the distribution of temperature of ocean water: Latitudes The temperature of surface water decreases from equator towards the poles because the sun’s rays become more and more slanting and thus the amount of insolation decreases poleward accordingly. The temperature of surface water between 40°N and 40°S is lower than air temperature … Read more

Sex ratio is used to describe the number of females per 1000 of males. Sex ratio is a valuable source for finding the population of women in India and what is the ratio of women to that of men in India. In the Population Census of 2011 it was revealed that the population ratio in … Read more

The practice of cultivating two or more crops simultaneously on the same piece of land is called mixed cropping. During mixed cropping, if one crop faces adverse conditions or pathogen attack then the other crop can be saved.The basic objective in mixed cropping is to minimize the risk and insure against the crop failure due to … Read more

According to Albert Einstein’s theory of general relativity, black holes are uninhabitable chasms of spacetime that end in a ‘singularity,’ or a mass of infinite density. Black holes, with gravitational fields so powerful that not even light could escape them, were inferred by quantum physics about a century ago. It’s a place so bleak that even the laws of physics … Read more

Every location on Earth receives sunlight at least part of the year. The amount of solar radiation that reaches any one spot on the Earth’s surface varies according to: Geographic location Time of day Season Local landscape Local weather. Because the Earth is round, the sun strikes the surface at different angles, ranging from 0° … Read more

Apart from incessant rainfall during the monsoon, there are many contributory factors, natural and man-made. At the crux is the very nature of the river Brahmaputra —dynamic and unstable. Its 580,000 sq km basin spreads over four countries: China, India, Bangladesh and Bhutan, with diverse environments. The Brahmaputra features among the world’s top five rivers … Read more

Climate change is inevitable. The best strategy to deal with climate change is adoption of practices to make our farming more resilient. ICAR has launched a network of project called NICRA. It stands for National innovation on climate resilient agriculture. The salient features of NICRA are as follows:   It takes into account the critical … Read more

Rainwater harvesting is the process to capture and store rainfall for its efficient utilization and conservation to control its runoff, evaporation and seepage. Some of the benefits of rainwater harvesting are: It increases water availability It checks the declining water table It is environmentally friendly It improves the quality of groundwater through dilution, mainly of … Read more

Social Forestry means the management and protection of forests as well as afforestation of barren lands with purpose of helping in the environmental, Social and rural development. Social forestry is forestry for community development. Thus, it is people oriented, value based management of forests with a major objective of satisfying the needs, wants and aspirations of … Read more

The 2011 Census is the first one in many decades which counted less absolute number of children in the 0-6 age group. Compared to 2001 Census count of 164 million children, there were 159 million children in 2011, or there were 5 million fewer children in India. This is evident in the share of children … Read more