Indian Ocean is Rising

Changing sea levels have happened before and will happen again in a dynamic world. Newly detected rising sea levels in parts of the Indian Ocean, including the coastlines of the Bay of Bengal, the Arabian Sea, Sri Lanka, Sumatra and Java, appear to be at least partly a result of human induced increases of atmospheric greenhouse gases, says a study led by the University of Colorado at Boulder. The study, which combined sea surface measurements going back to the 1960s and satellite observations, will threaten inhabitants of some coastal areas and islands.

The key player in the rising Indian Ocean process is the Indo-Pacific warm pool, an enormous, bathtub shaped area of the tropical oceans stretching from the east coast of Africa west to the International Date Line in the Pacific. The warm pool has heated by about 1 degree Fahrenheit, or 0.5 degrees Celsius, in the past 50 years.

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India launches 17th remote sensing satellite:Remote Sensing Satellites of India

Indian Space Research Organisation (ISRO) successfully launched its Polar Satellite Launch Vehicle (PSLV) rocket that slung into orbit five satellites, including Cartosat-2B, the 17th remote sensing satellite of India.Here is a list of indian remote sensing satellites.

Apart from its main cargo – the Cartosat-2B weighing 694 kg – the other satellites that the rocket put into orbit are the Algerian remote sensing satellite Alsat-2A (116 kg), two nano satellites (NLS 6.1 AISSAT-1 weighing 6.5 kg built by the University of Toronto, Canada and one kg NLS 6.2 TISAT built by University of Applied Sciences, Switzerland) and STUDSAT, a pico satellite weighing less than one kg, built jointly by students of seven engineering colleges in Andhra Pradesh and Karnataka.Cartosat-2B is mainly intended to augment remote sensing data services to the users of multiple spot scene imagery with 0.8 metre spatial resolution and 9.6 km swath in the panchromatic band. The multiple spot scene imagery sent by Cartosat-2B’s panchromatic camera would be useful for village level/ cadastral level resource assessment and mapping, detailed urban and infrastructure planning and development and transportation system planning.It will also prove useful in preparation of large-scale cartographic maps, preparation of micro watershed development plans and monitoring of developmental works at village/ cadastral level, according to ISRO. Cartosat-2B’s imagery can also be used to prepare detailed forest type maps, tree volume estimation, village/cadastral level crop inventory, town/village settlement mapping and planning for comprehensive development. The imagery could also be used for canal alignment, rural connectivity assessment, planning new rural roads and monitoring their construction, coastal landform/land use and coral/mangrove mapping and monitoring of mining activities, ISRO said.The launch was earlier scheduled for May 9 but it had been rescheduled after a marginal drop in pressure in the second stage of the vehicle was noticed during mandatory checks on the rocket.

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India’s Green Revolution:Successes, Failures and Second Green Revolution

Rice up close

In the 1960s, there was concern from the Indian government that the country would not be able to grow enough food to support the ever increasing population, so they put into place what was called the ‘Green Revolution’. The idea of the ‘Green Revolution’ was to use technology to increase food output and as a result, over the last 50 years a series of changes have taken place in farming in India with the introduction of more ‘Western-type’ farming techniques.What changes in farming in India did the Green Revolution bring about?

LAND REFORM –

Efficient farming was difficult in India due to the many small farms (75% less than 3ha), which had become a product of the ‘Laws of Divided Inheritance’ (with farms being split between the sons of the farmer on his death), many of the poor didn’t even own land, whereas large amounts of land were owned by a few rich land ownersThe solution was  Land Reform – aimed to increase farm size, setting a limit on the amount of land the more wealthy could own and redistributing surplus land to those without.

HIGH YIELDING VARIETIES

The problem: existing rice varieties, grew rapidly but very tall so fell over easily and had to be grown quite far apart.The solution was the  development of new high yielding varieties of rice  – resulting in the development of a new rice plant known as IR8. This was shorter and stronger; could be planted much closer together, enabling more crop per area; had a shorter growing season and produced almost 3-4 times as much yield per hectare.

MECHANISATION

The problem: rice growing is labour intensive, with many jobs to be done requiring great human input.The solution was the  technology such as tractors and mechanised ploughs were introduced from MEDCs, replacing water buffalo and increasing efficiency, reducing the required human input.Other changes brought about by the Green Revolution:(i) – Irrigation schemes, including the introduction of electric / diesel pumps to help ensure a more steady and reliable source of water for the new IR8 HYVs and large-scale projects such as the Narmada River Project (a series of dams built to help provide water for irrigation of the land)
(ii) As the introduction of tractors and other ‘Western’ style technology was not as successful as first hoped, Alternative, ‘Appropriate Technology’ has been introduced which is suited to the local people’s wealth, skills and knowledge, for example low cost irrigation schemes etc.What were the successes of the Green Revolution?(i) Those that could afford the new Hybrid seeds, technology etc. saw an increase of 300% in crop yields;(ii) The overall increase in food production helped to feed the ever increasing poulation with India becoming largely self-sufficient(iii) Increased output overall meant that some subsistence farmers had a surplus which they were also able to sell, helping to raise living standards further. Money raised in this was was also reinvested into the farm, helping with the costs of machinery etc. or to buy more land(iv) Areas in which the Green Revolution was successful became richer and more money was available for investment in schools, clinics, industry etc.

Failures of the Green Revolution

  • Unfortunately for many farmers the cost of machinery was too much and they simply couldn’t afford it, as well as the high initial outlay, money was also required for fuel and repair.
  • Many very poor farmers, were tenant farmers, with little money to buy even the new seeds or fertiliser that was required.
  • New irrigation schemes were required to provide the reliable source of water required by the HYVs (High Yielding Varieties of rice). As well as being expensive, in some cases where inappropriate schemes were used salinisation became a problem. Dam construction in some areas also resulted in the flooding of some good farming land.
  • The large amounts of fertilisers and pesticides required by the HYVs also led to serious environmental problems as they entered water supplies
  • In areas where there was an increase in mechanisation, there was an increase in unemployment with fewer people needed to do the jobs that were now done using tractors etc.(vi) The consequent increase in unemployment in rural areas led to an increase in rural-urban migration with more people moving to the cities, causing urban problems(vii) Many farmers who had tried to take on the new technologies became heavily in debt, leading to increase stress and in some instances suicide.
  • The Green Revolution created wide regional and interstate disparities. The plan was implemented only in areas with assured supplies of water and the means to control it, large inputs of fertilizers, and adequate farm credit. These inputs were easily available in at least parts of the states of Punjab, Haryana, and western Uttar Pradesh; thus, yields increased most in these states. In other states, such as Andhra Pradesh and Tamil Nadu, in areas where these inputs were not assured, the results were limited or negligible, leading to considerable variation in crop yields within these states. The Green Revolution also increased income disparities: higher income growth and reduced incidence of poverty were found in the states where yields increased the most and lower income growth and little change in the incidence of poverty in other states.

Second Green Revolution

The first Green Revolution was launched to ensure food security as there was severe scarcity of food in the country. Today, our food supply is well secure. Meeting the growing needs is within reach. Therefore, the second Green Revolution should aim at promoting sustainable livelihood, enabling the poor to come out of poverty by generating gainful self-employment. While the first Green Revolution aimed at undertaking mass agricultural production, the second Green Revolution should be to promote agricultural production by the masses. This is the Gandhian approach to equitable sharing of prosperity by involving the poor in development. For achieving this goal, we need to search for technologies which can be adopted by the farmers in arid and semi-arid regions, and those who are dependent on rainfall for crop production.

Agroforestry on Degraded Lands:

Sustainable livelihood being the major concern, the second Green Revolution should focus on generation of employment for small and marginal farmers, while enhancing agricultural production in unirrigated areas. As most of these families own degraded and low fertile lands, deprived of irrigation, the focus should be on sustainable use of such lands. Presently, these lands are not being used intensively for high value crops. In fact, farmers often incur losses by farming on such lands, due to natural calamities. Such lands can be profitably used for establishment of drought tolerant fruit crops and agri-horti-pastures. Tree crops have the ability to withstand the vagaries of nature without sustaining heavy losses. Tree-based farming can also provide year-round employment while protecting the soil from erosion and runoff of rain water. Promotion of tree based farming will also enrich soil fertility and increase the water table while absorbing atmospheric carbon dioxide all round the year.

Source(s):

Geobytes

Wikipedia

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History of forests in India

There is enough evidence to show that dense forests once covered India. The changing forest composition and cover can be closely linked to the growth and change of civilizations. Over the years, as man progressed the forest began gradually depleting. The growing population and man’s dependence on the forest have been mainly responsible for this.

All ancient texts have some mention of the forest and the activities that were performed in these areas. Forests were revered by the people and a large number of religious ceremonies centred on trees and plants. The Agni Purana, written about 4000 years ago, stated that man should protect trees to have material gains and religious blessings. Around 2500 years ago, Gautama Buddha preached that man should plant a tree every five years. Sacred groves were marked around the temples where certain rules and regulations applied.

When Chandra Gupta Maurya came to power around 300 BC, he realized the importance of the forests and appointed a high officer to look after the forests. Ashoka stated that wild animals and forests should be preserved and protected. He launched programmes to plant trees on a large scale. These rules continued even during the Gupta period.

During the Muslim rule a large number of people  migrated to forests. This was the beginning of a phase of migration to the forest. They cleared vast areas of forests to make way for settlements.

The Muslims were all keen hunters and therefore had to have patches of forests where they could go hunting. This ensured that the trees in these areas were not felled, and the forest ecology was not tampered with. The Mughals showed more interest in gardens and their development. Akbar ordered the planting of trees in various parts of his kingdom. Jahangir was well known for laying out beautiful gardens and planting trees.

During the early part of the British rule, trees were felled without any thought. Large numbers of trees such as the sal, teak, and sandalwood were cut for export. The history of modern Indian forestry was a process by which the British gradually appropriated forest resources for revenue generation. Trees could not be felled without prior permission and knowledge of the authority. This step was taken to ensure that they were the sole users of the forest trees.

But after some time, the British began to regulate and conserve. In 1800, a commissioner was appointed to look into the availability of teak in the Malabar forests. In 1806, the Madras government appointed Capt. Watson as the commissioner of forests for organizing the production of teak and other timber suitable for the building of ships.

In 1855, Lord Dalhousie framed regulations for conservation of forest in the entire country. Teak plantations were raised in the Malabar hills and acacia and eucalyptus in the Niligiri Hills.

In Bombay, the conservator of forest, Gibson, tried to introduce rules prohibiting shifting cultivation and plantation of teak forests. From 1865 to 1894, forest reserves were established to secure material for imperial needs. From the 18th century, scientific forest management systems were employed to regenerate and harvest the forest to make it sustainable. Between 1926 and 1947 afforestation was carried out on a large scale in the Punjab and Uttar Pradesh. In the early 1930s, people began showing interest in the conservation of wild life.

During World War I forest resources were severely depleted as large quantities of timber were removed to build ships and railway sleepers and to pay for Britain’s war efforts. Between the two wars, great advancements in scientific management of the forests were made, with many areas undergoing regeneration and sustained harvest plans being drawn up. Sadly, emphasis was still not on protection and regeneration but on gaining maximum revenue from the forests. World War II made even greater demand on the forest than World War I had done.

With the independence of India in 1947, a great upheaval in forestry organization occurred. The princely states were managed variably, giving more concessions to the local populations. The transfer of these states to the government led to deforestation in these areas. But some forest officials claim that the maharajas cut down a lot of their forests and sold them. This may have been the case in some instances, but a lot of forest had existed and has been lost since the government took over these states.

The new Forest Policy of 1952 recognized the protective functions of the forest and aimed at maintaining one-third of India’s land area under forest. Certain activities were banned and grazing restricted. Much of the original British policy was kept in place, such as the classification of forest land into two types.

The next 50 years saw development and change in people’s thinking regarding the forest. A constructive attitude was brought about through a number of five-year plans. Until 1976, the forest resource was seen as a source of earning money for the state and therefore little was spent in protecting it or looking after it.

In 1976, the governance of the forest came under the concurrent list. ‘Development without destruction’ and ‘forests for survival’ were the themes of the next two five-year plans, aiming at increasing wildlife reserves and at linking forest development with the tribal economy. But a large gap between aim and achievement exists still.

Source(s):

Teri

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