Are we happy?
Published: Sep 30, 2013
Photo: Prasad
Bhutan is the best known example where the government has adopted the objective of maximising its Gross National Happiness Index.
Abstract: Strengthening the case that well-being should be a critical component of how the world measures its economic and social development, the 2013 World Happiness Report has identified the countries with the highest levels of happiness. India ranks at 111 out of the 156 countries studied.
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The accumulation of salts in soil to the extent that plant growth is inhibited. This is a common problem when crops are irrigated in arid regions; much of the water evaporates and salts get accumulated in the soil.
Soil pH is an indication of the acidity or alkalinity of soil. Soil pH is defined as the negative logarithm of the hydrogen ion concentration. As the amount of hydrogen ions in the soil increases the soil pH decreases. From pH 7 to 0 the soil is increasingly more acidic and from pH 7 to 14 the soil is increasingly more alkaline or basic.
The reduction in pH of the soil brought about by removal of cations (mainly Ca2+ and Mg2+) by leaching or removal by the crop.
An environmental concern when it contributes to groundwater contamination. It refers to the loss of plant nutrients from soils caused by water percolating downwards.
Nitrification is an important step in the nitrogen cycle in soil. It is the process by which ammonia is converted to nitrites (NO2-) and then nitrates (NO3-). This process naturally occurs in the soil, where it is carried out by a specialised bacteria.
Organic manure obtained by biological breakdown of vegetable, animal and industrial wastes including straw.
Occurs in warm, semi-arid environments, usually under grassland vegetation. The horizon of the soil is enriched with calcium carbonate precipitated from water moving downward through the soil, or upward through capillary action.
Refers to nutrients required by plants in very small quantities. The 7 essential plant micronutrients are—boron, chlorine, copper, iron, manganese, molybdenum and zinc.
The process of creating new plants vegetatively by root cutting or via seeds. Plant propagation can also refer to the artificial or natural dispersal of plants.
An increase in the rate of addition of nutrients, usually through fertiliser laden runoff, to water bodies, leading to an excessive multiplication of algae and other undesirable aquatic plant species.