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A middle path for Sri Lankan agriculture: Sustainable intensification – II

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By Professor W.A.J.M. De Costa
Senior Professor and Chair of Crop Science, Faculty of Agriculture, University of Peradeniya

Strategies to address the challenges posed by climate change on Sustainable Intensification

Cropping systems in all climatic zones of Sri Lanka at the lower (< 600 m above sea level) elevations are highly vulnerable to increasing temperatures and rainfall variability, which are two of the key features of climate change. Even those at higher elevations are not immune to these persistent trends in the climate because the crops and cropping systems at these elevations have evolved to be adapted to a lower temperature regime, which has been shown to be increasing at a faster rate than the temperatures at the lower elevations. Accordingly, incorporation of heat tolerance to all crops grown in Sri Lanka via a focused and sustained plant breeding effort is an essential medium-to long-term need.

It is important to note that unlike many new technologies that can be readily imported from overseas, new crop varieties have to be developed within Sri Lanka for them to be productive under the specific agro-environmental conditions (e.g. temperature, day length, rainfall regime, potential pests and diseases, soil conditions such as pH etc.). Accordingly, development of new crop varieties has to be based on the crop germplasm available in Sri Lanka. Even though foreign varieties with the required genes for heat tolerance may be incorporated via reproductive crossing or genetic engineering, such hybrid plants need to be genetically ‘purified’ and extensively tested under Sri Lankan agro-environmental conditions before being released to farmers. Therefore, given the challenging nature of the genetic and plant physiological modifications that need to be engineered in crops, new heat tolerant varieties of major food crops are unlikely to be released to Sri Lankan farmers in the near future.

Agronomic interventions to reduce the energy load on crops and soils should be introduced concurrently with the plant breeding efforts. In this regard, incorporation of shade into agricultural fields via suitable tree and shrub species, preferably leguminous trees, will be a win-win situation where several requirements for SI can also be fulfilled. The reduced radiation energy on the crop surface will reduce canopy temperature and thereby reduce the incidence of heat stress. Concurrent reduction of evapotranspiration rates will contribute to conservation of water and thereby increase the crops’ capacity to avoid possible drought periods. In addition to the amelioration of the crop’s microclimate, when properly managed through lopping and pruning, the shade trees can provide a supply of organic material to the soil and thereby ensure nutrient recycling.

A mulch of organic material will not only provide protection to the soil against building up excessive soil temperatures, but also help in conserving soil moisture while preventing erosion. Furthermore, the input of organic materials and their decomposition will bring about significant changes in the soil microbial population and thereby set in motion many of the soil biological, physico-chemical and ecological processes which are required for sustained regeneration of soil fertility. Incorporation of leguminous tree/shrub species will enable the harnessing of their ability to fix atmospheric nitrogen and thereby potentially reduce the requirement of inorganic nitrogen fertilizer.

Climate change is likely to accelerate crop developmental processes via increasing temperatures. While increasing temperatures have the possibility to increase crop growth rates in the currently cooler climates via increased photosynthetic rates, they are most likely to decrease growth rates in crops in the currently warmer climates via decreased photosynthetic rates and increased respiration rates. Similarly, all soil biological processes including decomposition of added organic material and release of nutrients through mineralization will be accelerated by the increased temperatures. Increased frequency of intermittent and terminal droughts will exert further limitations on crop growth and yields. These impacts of climate change will require careful fine tuning of the cropping systems and their management to increase resilience.

Many of the SI strategies have synergy with increasing crop resilience to climate change. For example, increasing water use efficiency of crops increase their drought tolerance. Strategies for increasing nutrient use efficiency can be synergised with strategies to reduce the emission greenhouse gases such as nitrous oxides and methane. Alternative water management strategies such as Alternate Wetting and Drying (AWD) and aerobic rice, which are primarily designed to reduce the total water use in rice cultivation, concurrently reduce methane emissions from rice fields. On the other hand, increased additions of organic material to crop lands could increase emissions of carbon dioxide, which is the major greenhouse gas that contributes to global warming and climate change. Therefore, careful management of different SI strategies is needed to maximize their benefits while minimising their adverse impacts.

Water management will have to play a key role in increasing climate resilience of Sri Lankan Agriculture. Climate models predict that the currently ‘wet’ areas (e.g. wet zone of Sri Lanka) could experience increased rainfall in a future climate, whereas the currently ‘dry’ areas (e.g. dry and intermediate zones of Sri Lanka) could experience decreased rainfall (termed as ‘wet getting wetter and dry getting drier’). Furthermore, climate models predict increased rainfall variability leading to a greater frequency of high rainfall events which are spaced apart over time. This means that there will be more extreme rainfall events leading to floods as well as more droughts in a future climate. In this regard, it is important to have a broad strategy to manage the river basins and the network of tank cascade systems in Sri Lanka to maximise the capture of excess water during high rainfall events and seasons, and ensure a controlled release to crop production and other purposes (e.g. hydropower generation) during dry periods. Rehabilitation of the networks of minor tanks in the cascade systems of major river basins such as the Mahaweli and Walawe, which had been abandoned or neglected with the implementation of the major irrigation schemes in these basins, could be a key initiative to ensure maximum use of rainwater that Sri Lanka receives in a future climate and thereby increase climate resilience in the cropping systems.

Concluding remarks

Sri Lankan Agriculture is at a critical juncture at present with a huge cloud hanging over its sustainability and capacity to ensure national food security in the face of biophysical challenges such as climate change, decreasing soil fertility and stagnating yields and socio-economic challenges such as increasing costs of production and decreasing farmer profits. Meeting these challenges require paradigm shifts in the way all stakeholders (i.e. farmers, researchers, extensionists, policy makers and all others in the entire value chain) approach the task of producing sufficient and safe food to the Sri Lankan people in an economically and environmentally sustainable manner. This situation presents an opportunity to have a new perspective and seek innovative and ‘out-of-the box’ solutions, especially while the Sri Lankan Agriculture is struggling to recover from the upheavals of recent policy decisions. In this regard, Sustainable Intensification offers a strategy and a set of practices among many others to all stakeholders, especially the farmers, researchers, extensionists and policy makers, to serious consider implementing. It is significant to note that Sustainable Intensification is increasingly adopted by a wide range of countries in all continents. Hence, it is appropriate that Sri Lanka is not left behind, but explores the potential of Sustainable Intensification for resolving the critical issues that its food production system and its associated value chain faces.

This article is adapted from a keynote address delivered by the author at the 3rd International Symposium on Agriculture organized by the Faculty of Agriculture of the Eastern University of Sri Lanka on the theme ‘Self-Sustaining Agriculture: Way forward for food security and safety’ on the 9th of March 2023. It has incorporated valuable comments on a first draft from Raj Gonsalkorale, Suchira Peiris, Vijith Gunawardena and Parakrama Jayasinghe.



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Putting people back into ‘development’ – a challenge for South

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In need of swift empowerment; working people of Sri Lanka.

Should Sri Lanka consider an 18th IMF programme? Some academicians exploring Sri Lanka’s development prospects in depth are raising this issue. It is yet to emerge as a hot topic among policy and decision-making circles in this country but common sense would sooner rather than later dictate that it be taken up for discussion by the wider public and a decision arrived at.

The issue of an 18th IMF programme was raised with some urgency locally by none other than Dr. Ganeshan Wignaraja,Visiting Senior Fellow, ODI Global London, one of whose presentations, made at the Regional Centre for Strategic Studies (RCSS), Colombo, was highlighted in this column last week, May 7th. An IMF programme is far from the ideal way out for a bankrupt country such as Sri Lanka but a policy of economic pragmatism would indicate that there is no other way out for Sri Lanka. Such a programme is the proverbial ‘Bird in the hand’ for Sri Lanka and it may be compelled to avail of it to get itself out of the morass of economic failures it is bogged down in currently.

While local economic growth possibilities are far from encouraging at present, such prospects globally are far from bright as well. Some of the more thought-provoking data in the latter regard were disclosed by Dr. Wignaraja. For example, ‘The IMF’s April 2026 World Economic Outlook projects global growth slowing to 3.1 percent in 2026; with downside risks dominating: prolonged conflict, geopolitical fragmentation, renewed trade tensions, bearing down hardest on emergent and developing economies.’

However, as is known, an ‘IMF bailout’ is fraught with huge risks for the people of a developing country. ‘The Silver Bullet’ brings hardships for the people usually and they would be required by their governments to increasingly ‘tighten their belts’ and brace for perhaps indefinite material hardships and discontent. For Sri Lanka, the cost of living is unsettlingly high and 20 percent of the population is languishing below the poverty line of $ 3.65 per day.

These statistics should help put the spotlight on the people of a country, who are theoretically the subjects and beneficiaries of development, and one of the main reasons, in so far as democracies are concerned, for the existence of governments. Placing people at the centre of the development process is urgently needed in the global South and shifting the focus to other considerations would be tantamount to governments dabbling in misplaced priorities.

Technocrats are needed for the propelling of economic growth but a Southern country’s main approach to development cannot be entirely technocratic in nature. The well being of the people and how it is affected by such growth strategies need to be prime focuses in discussions on development. Accordingly, discourses on how poverty alleviation could be facilitated need urgent initiation and perpetuation. There is no getting away from people’s empowerment.

In the South over the decades, the above themes have been, more or less, allowed to lapse in discussions on development. With economic liberalization and ‘market economics’ being allowed to eclipse development, correctly understood, people’s well being could be said to have been downplayed by Southern governments.

The development issues of Southern publics could be also said to have been compounded over the years as a result of the hemisphere lacking a single and effective ‘voice’ that could consistently and forcefully take up its questions with the global powers and institutions that matter. That is, the South lacks an all-embracing, umbrella organization that could bring together and muster the collective will of the South and work towards the realization of its best interests.

This columnist has time and again brought up the need for concerned Southern sections to explore the potential within the now virtually moribund Non-Aligned Movement to reactivate itself and fill the above lacuna in the South’s organizational and mobilization capability. In its heyday NAM not only possessed this institutional capability but had ample ‘voice power’ in the form of its founding fathers, with Jawaharlal Nehru of India, for example, proving a power to reckon with in this regard. The lack of such leaders at present needs to be factored in as well as accounting for the South’s lack of power and presence in the deliberative forums of the world that have a bearing on the hemisphere’s well being.

The Executive Director of the RCSS, Ambassador (Retd) Ravinatha Aryasinha, articulated some interesting thoughts on the above and related questions at a forum a couple of months back. Speaking at the launching of the book authored by Prof. Gamini Keerewella titled, ‘Reimagining International Relations from a Global South Perspective’, at the Bandaranaike Centre for International Studies, Colombo, Amb. Aryasinha said, among other things: ‘Historically, there is a precedent that has been realized by the Non-Aligned group of countries – unfortunately, rather than being reformed and modified at the end of the Cold War, it has been tossed away.’

The inability of the nominally existent NAM to come out of its state of veritable paralysis and voice and act in the name of the South in the current international crises lends credence to the view that the organization has allowed itself to be ‘tossed away.’ The challenge before NAM is to prove that it is by no means a spent force.

As indicted, NAM needs vibrant voices that could advocate value-based advancement for the global South. Moral principles need to triumph over Realpolitik. Such transformative changes could come to pass if there is a fresh meeting of enlightened minds within the South. Pakistan by offering to mediate in the ongoing conflict between the US and Iran, for instance, proved that there are still states within the South that could look beyond narrow self-interest and work towards some collective goals. Hopefully, Pakistan’s example will be emulated.

Along with Pakistan some Gulf states have shown willingness to work towards a de-escalation of the present hostilities in West Asia. This could be a beginning for the undertaking of more ambitious, collective projects by the South that have as their goals political solutions to current international crises. These developments prove that the South is not bereft of visionary thinking that could lay the basis for a measure of world peace. That is, there are grounds to be hopeful.

NAM needs to see it as its responsibility to make good use of these hopeful signs to bring the South together once again and work towards the realization of its founding principles, such as initiating value-based international politics and laying the basis for the collective economic betterment of Southern people.

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Artificial Intelligence in Academia: Menace or Tool?

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(The author is on X as @sasmester)

I have often been told by university colleagues how soulless and dangerous ‘artificial intelligence’ (AI) is to academia and humanity. They lament that students no longer read anything as they can now get various AI programmes to summarise what is recommended which is mostly in the English language to Sinhala or Tamil or get easier versions in English itself. They get their assignments and even dissertations fully or partially written by AI. And I am led to believe that universities do not have reliable detection software to assess plagiarism and academic fraud that have been committed using AI beyond the software freely available on the internet with their own limitations. This is due to financial restrictions in these institutions. Even these common malpractices have been done mostly with the aid of free AI programmes which are readily available, which means cheating in this sense is free and mostly safe. For teachers, this is a ‘menace’ in the same way ‘copying’ once was. But its implications are far worse.

But given the global investments made over AI, it cannot be wished away despite the enormous negative impact its use has on the environment, particularly due to its massive demand for energy. So, AI is with us to stay, and it has a considerable role to play in human civilisation even though like most innovations and inventions, this too carries its own burden of negativity. In this context, instead of demonising AI and lamenting its replacement of human agency and ingenuity, one needs to think seriously about how to deal with and engage with it reflectively and pragmatically as there is much it can offer if people are intelligent enough to make rational and sensible choices.

When I am making these observations, I am restricting myself to a handful of practices involving only writing both in university-based examination processes and in the fields of creative writing.

My initial introduction to AI was through the Research Methods class I used to teach in New Delhi. In 2022, this class was supposed to go to Dharmshala in Uttar Pradesh for fieldwork training, and we needed to write a funding proposal quickly. One of the students in the class, already familiar with ChatGPT introduced by OpenAI as a free programme in 2022, did the proposal with its help before the two-hour class was over. I edited it soon after and sent it off to the university administration for funding which we received. That stint of field work was completed in five days and was the most detailed work undertaken as a training programme up to that time in the university which had considerable output ranging from a documentary film to a detailed ethnography based on the findings.

While the technical details, the format of the proposal and its basic writing were done by AI due to the time constraints the class faced, its fine-tuning was done by me and a few students. AI could not then and even now cannot undertake that level of specificity without close human intervention. But the film, the ethnography and the actual process of research had nothing to do with AI. It was the result of human labour, thinking, planning and at times creativity and ingenuity. This was an early example of how AI could coexist in an academic environment if its technical usefulness was clearly understood and potential for excesses was also understood. But this was a time, easily accessible AI was just emerging, and we did not know much about it. But I was fortunate enough to have intelligent students in my class who gave me a crash course into this kind of AI use, which I followed up with my own reading and experimentation later on. As a result, I am keener now to see how it can be used for the betterment of academic practice rather than taking an uncritically demonising position, which I know will not lead anywhere.

But how is this possible? The lamentations of my colleagues about the abuse of AI in academic practice is not unfounded. It is a serious threat that remains mostly unaddressed not only in our country but almost everywhere else in the world too. This is mostly because the advancements of AI even in day-to-day free usage have far exceeded any thoughts for actionable codes of ethics to ensure its practice is sensible and ethical. At the same time, I cannot see why a student should not use AI to correct his spelling and grammar in assignments. I also cannot see why a student cannot seek AI’s help to secure research material from secondary sources available online which I have been doing for years. For instance, the originals of specific books and rare manuscripts might not be available in any repositories in our part of the world. In such situations, what AI might find us is all we have access to in a world where we are restricted in our mobility due to semi-racist visa regimes of failed empires and former superpowers as well as our own lack of ability to travel due to our own unenviable economic conditions. But unfortunately, the materials we need are often only available in research centers and libraries in those nations.

Similarly, when it comes to academic prose, it makes no sense now to take years to translate works from multiple languages to Sinhala and Tamil. This has always been a time-consuming, cumbersome and expensive process. Non-availability of Sinhala and English translations of core originals in languages such as English, French, German and so on has been a long-term problem for our country. But this can now be done well – at least from English to our languages – quite quickly and with a very low margin for error by using specific AI programmes which are meant to do precisely this. What this means is a quick expansion of knowledge in local languages which would have ordinarily taken years to achieve or might not have been possible at all. But still, this needs significant human intervention and time towards perfection. However, I do not think AI-based translations work as well for fiction and poetry or creative works more generally. But the ability for AI to emulate nuance and feeling in language is fast emerging. These are two clear examples of improving technical abilities in research and writing in which AI can be of help.

But looking for sources of information with help the help of AI or using it as a tool to undertake essential translations from one language to another is quite different from simply using it without ascertaining the accuracy of collected information, getting AI to do all your work without any reflection or without any hard work at all, including engaging AI to do the final product in a writing assignment — be that a term paper or a work of fiction. If one proceeds in this direction, as many unfortunately do nowadays, then, our ability to think and be creative as a species will become diminished over time and our sense of humanity itself will take a toll. This is what my colleagues worry about when they say AI is making younger generations soulless.

It is here that ethical practices on how to use AI responsibly without compromising our sense of humanity must play a central role. But these ethical practices must be formally written and taught, followed by viable programmes for detection and publication if unethical practices are followed. This needs to be the case particularly in teaching institutions as well as the broader domain of creative writing. After all, what is the fun in reading a novel or a collection of poetry written by AI?

It is time people began to think about what AI can do in their own fields without falling prey to its power and their own laziness. This brings to my mind Geoffrey Hinton’s words: “There is no chance of stopping AI’s development. But we need to ensure alignment; to ensure it is beneficial to us …” Similarly, as Yann LeCun observed, “AI is not just about replicating human intelligence; it’s about creating intelligent systems that can surpass human limitations.” In this sense, it is up to us to find our edge in creativity and common sense to find the most sensible way forward in using AI.

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Engelbert’s 90th birthday bash

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The legendary Engelbert Humperdinck, who is known for his hit songs such as ‘A Man Without Love’, ‘Release Me’, ‘Spanish Eyes’, ‘The Last Waltz’, ‘Am I That Easy To Forget’, ‘Ten Guitars’ and ‘I Can’t Stop Loving You’, turned 90 on 02 May, 2026, and there were some lovely Hollywood-related celebrations.

Before his birthday, Engelbert’s new single ‘I’ve Got You’ was released – on 23 April – and Engelbert had this to say: “‘I’ve Got You’ is especially close to my heart. It speaks to love, loyalty, and the quiet strength we find in one another”.

The main birthday event was held at The Starlight Cabaret, in Los Angeles, California, and Sri Lankan Raju Rasiah, now based in the States, and his wife Renuka, who are personal friends of Engelbert, were invited to participate in the celebrations, along with Ingrid Melicon – also a Sri Lankan, now domiciled in America.

The invitation said “An evening of music, memories and celebration. Let’s make it a night to remember!” And it certainly turned out to be a night never ever to be forgotten!

Invitees experienced a “magical entrance” with Engelbert’s name lighting up the screen and showing him performing his hit songs.

The invitees were also presented with a unique gift – a necklace with Engelbert’s face, engraved with the words “Remember, I Love You.”

Engelbert’s son, Bradley Dorsey, sang a tribute song ‘Only You’ for his dad, while Eddy Fisher’s daughters, Tricia and Joely, also got on stage to entertaining the distinguish gathering.

Engelbert didn’t perform but got on stage for the cutting of the birthday cake.

There was also a video compilation of birthday wishes from fellow celebrities, and the lineup included Gloria Gaynor, Micky Dolenz, Wayne Newton, Pat Boone, Lulu, Judy Collins, Deana Martin, Angélica María, Rupert Everett, Matt Goss, and more.

Birthday boy Engelbert Humperdinck

At 90, Engelbert is still performing. He’s on THE CELEBRATION TOUR for his 90th year, with over 50 international dates in 2026, including Australia, Germany, the US, and Canada. He’ll be at Massey Hall in, Toronto, on 06 October, 2026. He said: “The stage is my home… Canada has always been a highlight”.

He performed 60+ concerts, worldwide, in 2025, and says karaoke keeps his songs fresh: “Most of my songs are on karaoke because people love to sing them”.

 

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