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GS Paper: GS3

  • Punjab, Haryana need to look beyond MSP crops

    In tackling agri-crises, these core Green Revolution States must shift to high-value crops and promote non-farm activities

    Early adopters of Green Revolution Technology

    • The region comprising Punjab, Haryana and western Uttar Pradesh, was an early adopter of Green Revolution technology.
    • It was also a major beneficiary of various policies adopted to spread modern agriculture technology in the country.
    • The package of technology and policies produced quick results which enabled India to move from a country facing a severe shortage of staple food to becoming a nation close to self-sufficiency in just 15 years.

    Practice Question:

    Q. The traditional Green Revolution States of Punjab and Haryana would need to shed “business as usual” approach and embrace an innovative development strategy in agriculture and non-agriculture to secure and improve the future of farming and rural youth. Discuss.

    The rice and wheat focus

    • Procurement of marketed surplus of paddy (rice) and wheat at Minimum Support Price (MSP) completely insulated farmers against any price or market risks. It also ensured a reasonably stable flow of income from these two crops.
    • Over time, the technological advantage of rice and wheat over other competing crops further increased as public sector agriculture research and development allocated their best resources and scientific manpower to these two crops.
    • Other public and private investments in water and land and input subsidies were the other favourable factors.
    • Thus, wheat in rabi and paddy in Kharif turned out to be the best in terms of productivity, income, price and yield risk and ease of cultivation among all the field crops (cereals, pulses, oilseeds).
    • It is no surprise then that the area share of rice and wheat in the total cropped area rose drastically in these states.
    • The progress and specialization towards these two crops served the great national goal of securing the food security of the country.

    Problems of the Green Revolutionsurfaced during the mid-1980s

    • During the mid-1980s, some inimical trends related to the rice-wheat crop system in general and paddy cultivation, in particular, surfaced followed by serious second-generation problems of the Green Revolution.
    • Some experts foresaw the serious consequences of the continuation of paddy cultivation in the region and suggested diversification away from the rice-wheat system in the mid-1980s.
    • Since then a large number of reports and policy documents have been prepared to develop alternative options to reduce the area under paddy — necessitated by its adverse effect on natural resources, the ecology, the environment, and fiscal resources.
    • Serious concerns have also been expressed about plateauing productivity and stagnant income from rice-wheat cultivation. However, the area under these two crops has only increased rather than fallen.
    • In order to develop viable options to infuse dynamism in the agriculture economy of this Green Revolution belt, there is a need to understand: what attracts farmers to rice-wheat crops, why it needs to be changed, and how it can be changed.

    Punjab, Haryana vs. States

    • High productivity, assured MSP which is often above open market price, free power, and fertilizer subsidy underlie the higher income per unit area from wheat and paddy cultivation.
    • Land-labour ratio is also very favourable in Punjab when compared to other States; on an average, a farmer owns and cultivates 2.14 hectares net sown area as against 1.42 hectares in Haryana and 1.17 hectares at the national level.
    • An estimate of income (derived from National Accounts Statistics) shows that all agriculture activities taken together to generate an annual net income of â‚č5.31 lakh per cultivator in Punjab; it is â‚č3.44 lakh in Haryana while the all-India average is â‚č1.7 lakh (reference year, 2017-18).
    • A question often asked is that if per farmer agriculture incomes in Haryana and Punjab are two to three times more than the national average, then why is there so much talk of farmers’ distress in these two States?

    Why farmers’ distress in these two States when everything looks good?

    • The reasons seem to be the loss of growth momentum in the income from the agriculture sector, which has fallen to 1% in Haryana and 0.6% in Punjab after 2011-12.
    • This is quite low by any standard and not keeping in pace with an increase in households’ expenditure. The prospects of further growth in agricultural income from the crop sector dominated by rice and wheat are very dim.
    • With the productivity of rice and wheat reaching a plateau, there is pressure to seek an increase in MSP to increase income. However, demand and supply do not favour an increase in MSP in real terms.
    • In India, the per capita intake of rice and wheat is declining and consumers’ preference is shifting towards other foods.
    • The average spending by urban consumers is more on beverage and spices than on all cereals. On the supply side, rice production is rising at the rate of 14% per year in Madhya Pradesh, 10% in Jharkhand and 7% in Bihar.

    Issues related to procurement

    • The growing rice production will further increase pressure on the procurement and buffer stock of rice. Rice and wheat procurement in the country has more than doubled after 2006-07 and buffer stocks have swelled to an all-time high.
    • The country does not find an easy way to dispose of such large stocks and they are creating stress on the fiscal resources of the government.
    • The implication of all these changes is that farmers in the region will find it difficult to increase their income from rice-wheat cultivation and they must be provided alternative choices to keep their income growing.
    • Procurement of almost the entire market arrivals of rice and wheat at MSP for more than 50 years has affected the entrepreneurial skills of farmers to sell their produce in a competitive market where prices are determined by demand and supply and competition.
    • Thus, to enable Punjab and Haryana farmers to move toward high-paying horticulture crops requires institutional arrangements on price assurance such as contract farming.

    Environmental issues, unemployment

    • The biggest casualty of paddy cultivation and the policy of free power for pumping out groundwater for irrigation is the depletion of groundwater resources.
    • In the last decade, the water table has shown a decline in 84% observation wells in Punjab and 75% in Haryana. It is feared that Punjab and Haryana will run out of groundwater after some years if the current rate of overexploitation of water is not reversed.
    • In the last couple of years, the burning of paddy stubble and straw has become another serious environmental and health hazard in the whole region.
    • Another rather more serious challenge for the two States is to provide attractive employment to rural youths. Most of the farm work in these two States is undertaken by migrant labour.
    • The younger generation is not willing to do manual work in agriculture and looks for better paying salaried jobs in non-farm occupations. Government jobs are few and far less than the number of job seekers.
    • Thus, the option left is to create jobs in the private industry and the services sector. This requires private investments in suitable areas.
    • Punjab has witnessed a flight of private capital from the State during the rise of militancy which hurt the State economy, employment and the revenues of the State.
    • This setback has pushed the rank of the State in per capita income from number one in the 1970s and the early 1980s to number 13 among the major states of the country.
    • For further progress and to meet the aspirations of rural youth to get satisfactory employment, the State needs large-scale private investments in modern industry, services, and commerce besides agriculture.

    The solution lies in


    • The solution to the ecological, environmental and economic challenges facing agriculture in the traditional Green Revolution States is not in legalizing MSP but to shift from MSP crops to high-value crops and in the promotion of non-farm activities.
    • Rather than focusing on a few enterprises, Punjab and Haryana should look at a large number of area-specific enterprises to avoid gluts.
    • This will require a mechanism to cover price and market risks. Farmers’ groups and farmer producer organizations can play a significant role in the direct marketing of their produce.

    Agricultural specificities and way forward

    • Both Punjab and Haryana need to promote economic activities with strong links with agriculture tailored to State specificities.
    • Some options for this are: promotion of food processing in formal and informal sectors; a big push to post-harvest value addition and modern value chains; a network of agro- and agri-input industries; high-tech agriculture; and a direct link of production and producers to consumers and consumers without involving intermediaries.
    • The traditional Green Revolution States of Punjab and Haryana would need to shed “business as usual” approach and embrace an innovative development strategy in agriculture and non-agriculture to secure and improve the future of farming and rural youth.
  • Species in news: Indian bison (Gaur)

    A gaur (Indian bison) strayed into a residential area in Pune city and allegedly died while being captured. This has depicted another ugly face of the man-animal conflicts.

    Try this PYQ:                      

    Q.Which one of the following groups of animals belongs to the category of endangered species?

    (a) Great Indian Bustard, Musk Deer, Red Panda, Asiatic Wild Ass

    (b) Kashmir Stag, Cheetah, Blue Bull, Great Indian Bustard.

    (c) Snow Leopard, Swamp Deer, Rhesus Monkey, Saras (Crane)

    (d) Lion Tailed Macaque, Blue Bull, Hanuman Langur, Cheetah

    Gaur/ Indian Bison

    • The Indian bison are also known as Gaur, is native to South and Southeast Asia and has been listed as Vulnerable on the IUCN Red List since 1986.
    • The global population has been estimated at maximum 21,000 mature individuals by 2016.
    • It declined by more than 70% during the last three generations, and is extinct in Sri Lanka and probably also in Bangladesh.
    • Populations in well-protected areas are stable and increasing.
    • The Western Ghats and their outflanking hills in southern India constitute one of the most extensive extant strongholds of gaur, in particular in the Wayanad – Nagarhole – Mudumalai – Bandipur complex.
  • Convergence of agrarian discontent in South

    With protests becoming catalysts for anti-authoritarian struggle, the air is ripe for new visions of rural emancipation

    Recent policy changes and its impacts on agriculture

    • There has been a systematic attack on agriculture in South Asia over the last decades. This can be seen in ongoing protests in India.
    • Similar incidences of protests can be seen in Pakistan, where farmers protesting for support prices were beaten up and arrested in Lahore only a month ago, or Sri Lanka, where shortages of imported fertilizers and declining subsidies have led to farmers’ outcry.
    • In the middle of a long-simmering rural economic crisis pushed over the cliff by the COVID-19 pandemic, efforts by South Asian governments to project corporatization and deregulation as the way forward for agriculture have angered long-suffering farmers.
    • Successive governments have imposed a corporate agenda, seeking profits from food production and distribution by relaxing norms for cheap food imports, and encouraging export-oriented production, price speculation, agribusiness and retail supermarkets.
    • South Asia’s rural landscape has been profoundly reshaped by such ‘reforms’, dispossessing farmers of their land, and pushing them into wage labour and migration as coping mechanisms.
    • This hollowing out of rural livelihoods does not come with any assurance of stable jobs or a decent quality of life in urban areas.

    Pandemic opportunism

    • The COVID-19 crisis has increased such efforts and policy changes.
    • India is not the only country to have attempted to seize this moment to deregulate agricultural markets. In Pakistan, the government inked an agreement with the World Bank to further deregulate the country’s wheat market.
    • In Sri Lanka, with the national budget just passed for 2021, there are only meagre allocations towards revitalizing agricultural livelihoods and policies focused on supporting technologies suitable for agribusinesses.
    • Instead of the current crisis sending governments back to the drawing board, South Asia’s authoritarian regimes, complicit with corporate interests, are railroading in anti-farmer agricultural policies.

    Practice Question: Do you think there is a common ground between farmers protests in various South Asian countries. Discuss with proper examples.

    Menace of the corporatization of Agriculture

    • Corporate agriculture further worsens the existential danger faced by South Asian farmers.
    • The corporate solutions do not address the role of middlemen and traders in denying farmers a fair price for their labour.
    • Instead, opening up markets to large corporations is likely to spark the same sort of race to the bottom that has been seen in the industrial and service sectors.
    • Deregulation makes farmers’ livelihoods even more precarious and threatens food sovereignty through increased dependence on global agricultural trade.
    • It was the collapse of global agricultural commodity prices in the 1970s that had a large role to play in the debt crisis that haunts countries such as Pakistan and Sri Lanka.

    Reviving resistance

    • There is a powerful legacy of rural movements in South Asia that have fought for the rights of farmers, peasants and agricultural workers.
    • Rural movements played a crucial role in the anti-colonial struggle and fought for progressive land and agrarian reform after independence.
    • Seventy years on, they continue to fight against the recent waves of anti-farmer policies, while advancing new progressive visions such as peasant agro-ecology and food sovereignty, which put small food producers and the environment at the centre.
    • The current convergence of authoritarianism and corporate capital brings this existential crisis for rural agricultural producers even more sharply in focus.
    • Farmers’ movements have been aware of state connivance with exploitative actors, but they must now also contend with a breakdown of the democratic process and increased repression.
    • These should be ominous signs for regimes across South Asia which continue to act with impunity in the face of demands for economic and social justice.

    Voices of movements

    • The COVID-19 pandemic has pushed food sovereignty back into the public imagination. The solution, of course, only begins with making farming a viable livelihood.
    • Dominant assumptions about inevitable rural-urban migration and techno-utopian transformation in agriculture must be challenged.
    • Questions of land redistribution and other rural inequalities must remain a crucial part of the political agenda.
    • The situation of mostly female agricultural workers, the rural landless and Dalits in South Asia remains precarious. Even as rural movements across South Asia fight the ongoing attack on their livelihoods, they must also tackle rural inequality head-on.

    Conclusion

    • The air is ripe for new visions of rural emancipation in South Asia.
    • Rural movements are working to transform not just their world but are becoming catalysts for a broader anti-authoritarian struggle in South Asia.
    • The current phase of struggles has revived old questions while raising others about the future of our long-ignored rural world.
    • We must listen to the voices and demands of the rural movements converging across South Asia.
  • What is Project 17A?

    Himgiri, the first of the three stealth frigates being built by Garden Reach Shipbuilders and Engineers (GRSE), Kolkata, under Project 17A for the Navy, was launched into the water.

    Try this question:

    Q“To be secure on Land, we must be Supreme at Sea”. In this context, discuss why India is primarily a Maritime Nation?

    Project 17A

    • The coveted ‘Project 17A’ was cleared by the govt back in 2015.
    • It involves the building of seven stealth frigates at an estimated cost of Rs 50,000 crore.
    • Of these seven, the contract for three frigates was awarded to GRSE while the contract for another four frigates was awarded to Government-owned Mazagon Docks Limited (MDL) which is based in Mumbai.
    • These frigates will come armed with advanced state-of-the-art sensors and boast of top-notch stealth features.
    • They will represent the most advanced class of major surface warships for the Indian Navy in a decade, also featuring BrahMos supersonic surface-to-surface missiles.
    • These will also have torpedoes and rockets to hit submarines and rapid-fire guns to destroy anti-ship missiles as well as a heavy main gun to engage ships and coastal target.
  • Galaxy NGC 6240

    NASA’s Chandra X-ray Observatory shared the images of Galaxy NGC 6240 that contains two supermassive Black Holes in the process of merging.

    From astronomers to general space enthusiasts, black holes are a topic of interest for many. If you’re someone who spends a lot of their time researching facts about this region of space-time or watching videos on the same, then you must check out this news.

    Galaxy NGC 6240

    • The black holes, located in Galaxy NGC 6240 are 3,000 light-years apart and they will drift together to form a larger black hole millions of years from now.
    • As per a blog post by the observatory, the merging process began some 30 million years ago
    • The pairs of massive black holes in the process of merging are expected to be the most powerful sources of gravitational waves in the Universe.
    • Seen as the bright ‘dots’ near the centre of this image, the black holes are just 3,000 light-years apart.

    About Chandra X-ray Observatory

    • It is a telescope specially designed to detect X-ray emissions from very hot regions of the universe such as exploded stars, clusters of galaxies, and matter around black holes.
    • Orbiting at 139,000 km in space, the telescope was launched aboard the Space Shuttle Columbia during STS-93 by NASA in 1999.
  • Species in news: Himalayan Serow

    A Himalayan Serow has been sighted for the first time in the Himalayan cold desert region.

    Try this MCQ:

    Q.In which one of the following State, the Rupi Bhaba Wildlife Sanctuary is located?

    (a) Himachal Pradesh

    (b) Manipur

    (c) Meghalaya

    (d) Uttarakhand

    Himalayan Serow

    • Himalayan Serow resembles a cross between a goat, a donkey, a cow, and a pig.
    • They are herbivores and are typically found at altitudes between 2,000 metres and 4,000 metres (6,500 to 13,000 feet).
    • They are known to be found in eastern, central, and western Himalayas, but not in the Trans Himalayan region.
    • They are a medium-sized mammal with a large head, thick neck, short limbs, long, mule-like ears, and a coat of dark hair.
    • There are several species of Serow s, and all of them are found in Asia.

    Its’ conservation status

    • According to the IUCN, Himalayan Serow s have experienced significant declines in population size, range size and habitat in the last decade, and this is expected to continue due to intensive human impact.
    • Previously assessed as ‘near threatened’, the Himalayan Serow is now been categorised as ‘vulnerable’ in the IUCN Red List of Threatened Species.
    • It is listed under Schedule I of The Wildlife Protection Act, 1972, which provides absolute protection.

    What is so unusual this time?

    • The animal was spotted by locals and wildlife officials at a riverside rocky wall near Hurling village in Spiti, Himachal Pradesh.
    • This is the first recorded human sighting of the Serow in Himachal Pradesh.
    • Serow s are generally not found at this altitude, and never before has a Serow been seen in the Himalayan cold desert.
    • Wildlife officials believe this particular animal may have strayed into the Spiti valley from the Rupi Bhaba Wildlife Sanctuary in adjoining Kinnaur.
  • The roots of the agricultural crisis run deep

    The standoff between farmers and the government continues even after a few rounds of discussion.

    Un-timely reforms

    • Currently, the country was struggling with novel coronavirus-caused lockdowns, supply disruptions, job losses and falling incomes in an economy.
    • The reforms embedded in the three Acts are unlikely to help resolve the structural issues facing Indian agriculture, even their withdrawal is unlikely to change the ground reality.

    Farmers protest continues

    • The immediate trigger for the current protests is the enactment of the three Acts, on agricultural marketing, contract farming and stocking of agricultural produce, which deregulates the existing Acts on these.
    • Farmer unions have rejected the proposal and continue to demand complete withdrawal of the three Acts along with making MSP a guarantee.

    Government for negotiations

    • The latest proposal by the government indicates its willingness to amend the three agriculture-related Acts passed in September.
    • The government has proposed amendments which will empower the States to frame rules the contentious issues of registration of private traders, levy of taxes on trade outside the Agricultural Produce Market Committee (APMC) mandis.
    • Similar assurances have been given on access to the judiciary for dispute resolution and continuation of the Minimum Support Price (MSP) mechanism.

    Many protests, one thread

    • The last four years have seen a series of large protests in most of the States.
    • For example, a group of farmers from Tamil Nadu camped in Delhi for over 100 days, Maharashtra was witness to the ‘Kisan Long March’ of farmers on more than one occasion, protests erupted in Rajasthan, UP, Haryana and MP.
    • The latest round of protests may have seen spirited protests from farmers from Punjab and Haryana but has found the support of farmers from the other States as well.
    • The common thread in all these protests — of declining agricultural incomes, stagnant wages and withdrawal of state support to agriculture.

    Changing faces of agriculture

    • The real issue is the lack of remunerative prices for a majority of agricultural commodities, a sharp increase in price variability in recent years, and an unpredictable and arbitrary government policy regime.
    • The other major problem is the changing nature of agriculture which has seen increased dependence on markets, increasing mechanization along with increasing monetization of the agrarian economy.
    • The increased dependence on markets has contributed to increasing variability in output prices.
    • Limited government intervention in protecting farmers’ income and stabilizing prices through MSP-led procurement operations made the increased variability in frequency as well as its spread.
    • Other than rice and wheat — and to some sporadic instances, of pulses — most crops suffer from inadequate intervention from MSP operations.
    • Even these procurement operations are unable to stabilize prices with falling demand and a slowing economy. For example, wheat has seen a steady decline in year-on-year inflation based on Wholesale Price Index (WPI).
    • Uneven nature of procurement in some states is also responsible to arrest the decline in prices. Crops like paddy, maize have seen in many States significantly lower market prices than the MSP.

    Factors behind vulnerability

    • Increasing mechanization and monetization have led to an increase in the cash requirement.
    • Most of these are met by non-institutional sources including middlemen which have contributed to the rising cost of cultivation and an increase in loan defaults.
    • The demand for loan waivers is unlikely to subside with the rising cost of inputs.
    • These trends have accentuated after 2010-11 when the Nutrient Based Subsidy (NBS) for fertilizers regime led to an increase in fertilizer prices.
    • The withdrawal of diesel subsidy and a rise in electricity prices also contributed to making agriculture unviable.
    • The government has declined the agricultural investment in the first four years which resulted in rising input costs and falling output prices.
    • The shocks of demonetization and the lockdown only increased the uncertainty and vulnerability in the agricultural sector both on input and output prices.

    What lies ahead?

    • The demand for making MSP a guarantee for private trade is meaningless if the government is unable to ensure procurement for a majority of the 23 crops for which it announces MSP.
    • Thus, the withdrawal of the three Acts by the government will only seem to offer a temporary truce.

    Policy overhaul needed

    • The existing policy framework with an excessive focus on inflation management and obsession with the fiscal deficit will likely lead to lower support from the government either in price stabilization or reduction in the cost of cultivation through fiscal spending.
    • The agricultural sector needs a comprehensive policy overhaul to recognize the new challenges of agriculture which are diversifying and getting integrated with the non-agricultural sector.
    • This not only entails a better understanding of the structural issues but also innovative thinking to protect farmers’ livelihood from the uncertainty of these changes.
    • Above all, it requires financial support and institutional structures to support the agricultural sector and protect it. Only this can lead to the government’s dream of doubling the farmers’ income.
  • Hydroponics: the art of soil-less farming

    This newscard is an excerpt from the original article published in TH.

    Many questions related to agricultural techniques are being asked in the Prelims. UPSC has done away with traditional crop-related questions for the past two years. 

    For example, see this question from CSP 2020:

    Q.What are the advantages of fertigation in agriculture?

    1. Controlling the alkalinity of irrigation water is possible.
      2. Efficient application of Rock Phosphate and all other phosphatic fertilizers is possible.
      3. Increased availability of nutrients to plants is possible.
      4. Reduction in the leaching of chemical nutrients is possible.

    Select the correct answer using the code given below:
    (a) 1, 2 and 3 only

    (b) 1,2 and 4 only

    (c) 1,3 and 4 only

    (d) 2, 3 and 4 only

    What is hydroponics?

    Hydroponics is the cultivation of plants without using soil.

    • Hydroponic flowers, herbs, and vegetables are planted in inert growing media and supplied with nutrient-rich solutions, oxygen, and water.
    • This system fosters rapid growth, stronger yields, and superior quality.
    • When a plant is grown in soil, its roots are perpetually searching for the necessary nutrition to support the plant.
    • If a plant’s root system is exposed directly to water and nutrition, the plant does not have to exert any energy in sustaining itself.
    • The energy the roots would have expended acquiring food and water can be redirected into the plant’s maturation. As a result, leaf growth flourishes as does the blooming of fruits and flowers.

    Why Hydroponics?

    • Plants sustain themselves by a process called photosynthesis. But they do not need soil to photosynthesize.
    • They need the soil to supply them with water and nutrients.
    • When nutrients are dissolved in water they can be applied directly to the plant’s root system by flooding, misting, or immersion.
    • Hydroponic innovations have proven direct exposure to nutrient-filled water can be a more effective and versatile method of growth than traditional irrigation.

    How does hydroponics work?

    • Hydroponic systems work by allowing minute control over environmental conditions like temperature and pH balance and maximized exposure to nutrients and water.
    • It administers nutrient solutions tailored to the needs of the particular plant being grown.
    • They allow you to control exactly how much light the plants receive and for how long.
    • pH levels can be monitored and adjusted. In a highly customized and controlled environment, plant growth accelerates.

    Components of Hydroponics

    To maintain a flourishing hydroponic system, we need to become acquainted with a few components that make it run efficiently.

    (1) Growing media

    • Hydroponic plants are often grown in inert media that support the plant’s weight and anchor its root structure.
    • Growing media is the substitute for soil, however, it does not provide any independent nutrition to the plant.
    • Instead, this porous media retains moisture and nutrients from the nutrient solution which it then delivers to the plant.

    (2) Air stones and air pumps

    • Plants that are submerged in water can quickly drown if the water is not sufficiently aerated. Air stones disperse tiny bubbles of dissolved oxygen throughout your nutrient solution reservoir.
    • These bubbles also help evenly distribute the dissolved nutrients in the solution. Air stones do not generate oxygen on their own.
    • They need to be attached to an external air pump via opaque food grade plastic tubing

    (3) Net pots

    • Net pots are mesh planters that hold hydroponic plants. The latticed material allows roots to grow out of the sides and bottom of the pot, giving greater exposure to oxygen and nutrients.
    • Net pots also provide superior drainage compared to traditional clay or plastic pots.

    Benefits

    By controlling the environment of the plant in hydroponics, many risk factors are reduced:

    • Plants grown in gardens and fields are introduced to a host of variables that negatively impact their health and growth. Fungus in the soil can spread diseases to plants.
    • Wildlife like rabbits can plunder ripening vegetables from your garden.
    • Pests like locusts can descend on crops and obliterate them in an afternoon. Hydroponic systems end the unpredictability of growing plants outdoors and in the earth.
    • Without the mechanical resistance of the soil, seedlings can mature much faster.
    • By eliminating pesticides, hydroponics produces much healthier and high-quality fruits and vegetables. Without obstacles, plants are free to grow vigorously and rapidly.

    Various limitations

    • A hydroponic system isn’t cheap
    • Constant monitoring is required
    • Micro-organisms that are water-based can creep in rather easily
    • Growing a hydroponic garden demands an expertise
    • Production is limited compared to field conditions
    • If a disease appears, all plants in the system will be affected
    • Without soil to serve as a buffer if the system fails plant death will occur rapidly
  • Shola Sky Islands of the Western Ghats

    Tropical montane grasslands (TMG) in the Shola Sky Islands of the Western Ghats have suffered big losses due to invasions by exotic trees.

    Try this PYQ:

    Q.In India, which type of forest among the following occupies the largest area?
    (a) Montane Wet Temperate Forest
    (b) Sub – tropical Dry Evergreen Forest
    (c) Tropical Moist Deciduous Forest
    (d) Tropical Wet Evergreen Forest

    Sky Islands

    • “Sky islands” are the tops of tall mountains that become environmentally isolated from each other even if they are close together, geographically speaking.
    • The Western Ghats are a mountain chain in southwest India home to spectacular and unique sky islands.
    • The peaks of the Western Ghats, ranging between 3,000 and 8,500 feet above sea level, host an almost unbelievable array of microclimates, looking like “patches of forests floating in a sea of grasslands.

    What are TMGs?

    • TMG are high elevation grasslands forming only 2% of all grasslands in the world.
    • Among their functions is regulating the global carbon cycle and serving as a source of water to downstream communities.
    • Researchers say grasslands do not benefit from conservation and restoration efforts afforded to tropical montane forests, possibly due to limited information.

    Treasures of Shola

    • One of the specific habitats unique to the sky islands of this area is a type of low-temperature, high-humidity tropical cloud forest full of stunted trees mixed with grasslands called the Shola.
    • The Shola forests of South derive their name from the Tamil word solai, which means a ‘tropical rain forest’.
    • Classified as ‘Southern Montane Wet Temperate Forest’ the Sholas are found in the upper reaches of the Nilgiris, Anamalais, Palni hills, Kalakadu, Mundanthurai and Kanyakumari in the states of Tamil Nadu and Kerala.
    • These forests are found sheltered in valleys with sufficient moisture and proper drainage, at an altitude of more than 1,500 metres.

    Various threats to them

    • Loss of grasslands due to invasive exotic trees is a “novel threat” through the establishment and expansion of exotic tree plantations.
    • These exotic trees include acacias, pines and eucalyptus, shrinking the range sizes of endemic species, including plants, birds, amphibians and mammals.
    • In the Western Ghats, 23% of montane grasslands were reportedly converted into invasive exotic tree cover over a period of 44 years.
    • Attempts to manage invasive exotic trees in montane grasslands incorporated approaches that include prevention and mechanical, chemical and biological control.
    • For invasive species such as Acacia mearnsii that grow rapidly and disperse seeds widely, removing mature trees is often ineffective.
  • How epigenetics alters inherited genetics’ message

    Researchers have found the cause of vision impairment due to ageing as the accumulation of “epigenetic noise” that disrupts gene expression patterns leading to changes in inherent DNA function

    Genetics is an all-time favourite of UPSC. Every year you can find a question in prelims. Try this one from CSP 2020:

     

    Q.Consider the following statements:

    1. Genetic changes can be introduced in the cells that produce eggs or sperms of a prospective parent
    2. A person’s genome can be edited before birth at the early embryonic stage.
    3. Human-induced pluripotent stem cells can be injected into the embryo of a pig.

    Which of the statements given above is/are correct?

    (a) 1 only

    (b) 2 and 3 only

    (c) 2 only

    (d) 1, 2 and 3

    What is Epigenetics?

    • Epigenetics is the study of how your behaviours and environment can cause changes that affect the way your genes work.
    • Unlike genetic changes, epigenetic changes are reversible and do not change your DNA sequence, but they can change how your body reads a DNA sequence.
    • Environmental stimuli can cause genes to be turned off or turned on.
    • This determines a cell’s specialization (e.g., skin cell, blood cell, hair cell, liver cells, etc.) as a fetus develops into a baby through gene expression (active) or silencing (dormant); and nurture.
    • This normal epigenetic control on our genes can get altered during normal ageing, stress and disease conditions.

    Cellular regulators

    • The functioning of cells and tissues in our body are controlled by thousands of proteins that regulate various cellular functions.
    • These proteins are in turn encoded by the respective genes which are a part of our genome or the cellular DNA.
    • Any minor or major changes to our inherited DNA (addition or mutation) can result in altered protein production, which in turn leads to defective cellular functions.
    • This forms the basis for many heritable genetic disorders affecting mankind.

    A trigger for various inactivities

    • Apart from DNA or protein sequence level alterations, there are other biochemical changes that influence and dictate if a gene should be active or inactive in a given cell type.
    • For example, the gene that encodes for the insulin protein is present in the exact form, in every cell of the body.
    • However, it is allowed to express only in the insulin-secreting beta cells of the pancreas and is kept inactive in the rest of the cells of the body.
    • This phenomenon is tightly regulated by a combination of regulatory proteins that changes the expressivity of the gene.
    • Also, the histone proteins that bind the DNA and help to compactly wrap it inside the chromosomes can undergo chemical modifications such as methylations and acetylations on different lysine amino acids within the protein.
    • These modifications both on the DNA and its associated proteins alter the chromosomal conformations and regulate gene expression.
    • These changes can either unwind the DNA and allow gene expression or can compact the DNA and render the genes in the region inactive or silent.

    Epigenetics and the human eye

    • The human (and mammalian) eye is a remarkable organ in the course of evolution which has allowed us to “see” the external world clearly and in colour.
    • Earlier forms, such as microbes and plants, reacted to light in other ways (for absorption and use, such as photosynthesis).
    • The front part of the human eye (cornea, lens and the vitreous humour gel) is transparent, colourless and helps focus the incoming light into the retina, helping us see colour.
    • It is the retina that sends the message to the brain.
    • Its main component, called the retinal ganglion cells (RGC) are the ones that help in this process of sending the message in the form of electrical signals, called neurons or nerve cells.
    • Thus, RGCs are the ones that convert optics into electronics.