Opinion
Harvesting Aquatic weed for biofertiliser – another dead rope for the farmer?
By Chandre Dharmawardana, Canada
Mr. I. C. P. Mendis, writing to The Island (“The organic deal – killing two birds with one stone”, 15-05-21) proposes to harvest aquatic weeds like Water Hyacinth (“Japan Jabara”) to make organic biofertiliser and clearing the water ways, too. This suggestion is preceded by a conspiratorial theory mentioning Dr. Senaka Bibile, an old colleague of mine, who pushed for generic pharmaceuticals. Then Mr. Mendis meanders into claiming that those who support the use of agrochemicals are treacherous agents of multinational companies who are only interested in profits.
Mr. Mendis says, “The defeated forces have now received some oxygen, and we see even the high and mighty, who were sent reeling home at the polls, attempting to make their presence felt. There is everything which points to financing by the fertiliser lobby, against the organic fertiliser issue”.
Mr. Mendis forgets that those who were defeated at the polls also championed organic fertiliser, under the slogan of a “Toxin-free Nation” and even banned glyphosate. This government has exempted many such pesticides and key agrochemicals from the “ban” which seems to be mostly in name.
After hatching the conspiracy claim, Mr. Mendis suggests making organic fertiliser, and possibly bio-energy out of the aquatic weeds dragged off the water and processed. Farmers, or commercial outfits are called upon to do this. He has himself NOT tested it, as is typical of most suggestions for “going organic”.
In my view, adopting a full organic programme worldwide is environmentally bad for the world (and impossible for Lanka) because it needs twice as much land, and twice as much water to put into practice. Then there is the danger of plants accumulating metal toxins (phyto-accumulation) and those getting into manure when plant matter is recycled by composting. Adrian Meuller, a leading world authority advocating organic farming wrote a lead article on organic farming in the journal NATURE and showed that if the world were to “go.organic”, the world population must be halved, and they should become vegetarians to free up cattle ranching land for growing food. A link to Mueller’s work may be found in my comment on Mueller’s research given in the link:.
https://dh-web.org/place.names/posts/CD-Mueller-OrganicL.pdf
The right solution is a hybrid approach. BUT SRI LANKA’S PROBLEM IS NOT ORGANIC VERSUS MINERAL FERTILISER. IRRESPECTIVE OF WHAT FERTILISERS WERE USED, THE FARMER CANNOT GET HIS PRODUCT TO THE MARKET. An indebted farmer cannot implement cutting edge ecologically sound farming practice. All the price guarantees, and purchase schemes of successive governments have been a farce. So what is the use of talking about fertilisers, pesticides, good agricultural practices, etc., if in the end the farmer cannot market his prodcut, and he/she is forced to even commit suicide? In contrast, the plantation sector has a good marketing system since colonial times. There is no excuse as to why good agricultural practices, soil remediation, etc., have not been adopted by, say, tea estates.
Unfortunately, instead of tacking the real issues of the small farmer, all kinds of irrelevant solutions are proposed. Let us look closely at Mr. Mendis’s proposal because such suggestions were tossed out even in the 1970s when I worked as a Professor of Chemistry at what is today the SJP university. The basic numbers to evaluate the feasibility of such projects have been avialble for a long time.
Eichhornia crassipes (Water Hiacynth) and various types of aquatic Ipomea, Hydrilla, Ceratophyllum are found on water bodies that receive the nutrient-rich run off from agricultural land and grabage dumps. Typically 20% or more of the water surface may get covered, and Ceratopphyllum and Hyrdilla may develop submerged thick mats that asphyxiate the aquatic system. However, harvesting the voluminous material from the water poses grave problems:
(a) collecting them into drying beds or composting areas equires heavy dredging equipment that burn expensive fossil fuel.
(b) The harvest, when dried, is negligible. Thus, 1000 square meters of aquatic area usually provides about 800-900 kg of dry material, although the harvested wet weight is 9-10 tonnes. The ten tonnes of wet smelly material cannot be easily dried in the sun and need special kilns,. It cannot be directly composed without mixing with suitable dry material. In effect, it is very inconvenient and expensive to work with.
(c) The composted material, even under the best conditions contains only 2-2.5 % nitrogen. That is, ten tonnes of initial material produces merely 15-20 kg of nitrogen fertiliser after much investment in energy, and machinery!
What Mr. Mendis in his goodness of heart has done is to give a “dead rope” to the farmer. At the end of the day the farmer is left bankrupt while the elites who clamour for organic food on their plate will look after themselves somehow.
The impact on the aquatic system of the lake is also not unfavourable. The sudden removal of the top layers of the aquatic weeds lets sunlight into the submerged weeds which now grow profusely. It is well known that aquatic weeds cannot be controlled in this naive manner of simple harvesting of the surface growth. It is mechanically quite demanding and expensive to remove all the submerged growth as well.
In fact, when a lake is clogged, many complex methods of reclaiming are needed. This includes the introduction of fish species (“grass carps”) that eat up the submerged growth, and then harvesting the surface growth gradually. In addition, control of soil erosion and run off from the neighbouring urban and agricultural lands need to be undertaken.
The best solution to prevent aquatic weed growth it to put floating solar panels on the water. Then no aquatic growth occurs submerged or on the water surface. Water is conserved by the reduction of evaporation day and night, and electric power is produced during the day time.
Mr. Mendis has been carried away by a seemingly simple but mostly impractical idea. Similar proposals to convert plastic into petrol, purify water with “kumbuk” roots, provide potassium to soils with left over banana skins, tackling Covid with coriander, ginger and herbal smokes (“dhum hattiya”), or asking the farmer to make his own fertiliser with a few buckets of cow-dung and a few bales of straw in his own “kumbura” are very fashionable these days. An individual introduced as a Professor of Agricultural, speaking on a TV programme claimed that imported oranges, i.e., “rata dodan” do not contain Vitamin C. Only the local “paeni dodan” was claimed to have Vitamin C.
I have written many articles pointing out that the claim that “Sri Lanka’s rivers and soils are contaminated with poisons” is an utter falsehood. Chemical analysis of the river waters and soil have shown no significant amounts of heavy metals or pesticdes.
If “people eat posisoned food”, as claimed by the ochestrations for organic food, the life expectance should drop drastically due to chronic toxicity. Countries like Singapore and New Zealand, etc., use some 100 times more argochemicals per hectare compared to Sri Lanka, and the life expectancy in those countries have INCREASED since the days prior to modern agriculture. The incidence of cancer, kidney disease, etc., has NOT increased in Si Lanka with time. Instead, the disease has decreased and the life expectancy has increased. The kidney disease endemic in the Rajarata is a result of hurriedly settling farmers in the accelerated Mahaweli C programme in areas where the water in their dug wells is found to be contaminated with fluoride and magnesium ions of geological origin.
In a very recent U-tube emission Dr. Padeniya of the GMOA claims that since 1960, Sri Lankans have been EATING POISON IN THEIR FOOD. Mr. Mendis also seems to think so, and want people to eat only organic food. But the attached graph shows that the life expectancy in Sri Lanka has steadily increased, except during the Eelam wars.
So Mr. Mendis, and Dr. Padeniya, what kind of poison in the food increases the life expectancy of Lankans? What kind of posion decreases infant mortality?
Opinion
Nilanthi Jayasinghe – An Appreciation
It was with shock that I realized that the article in the Sunday Island of April 5 about the winsome graduate gazing serenely at her surroundings was, in fact, an obituary about Nilanthi Jayasinghe, a former colleague who I had held in high esteem. I had lost touch with Nilanthi since my retirement and this news that she had passed away, saddened me deeply
I knew and had worked with Nilanthi – Mrs Jayasinghe as we used to call her – at the Open University of Sri Lanka in the 1990s. As Director, Operations, she was a figure that we as heads of academic departments, relied on; a central bastion of the complex structure that underpinned academic activities at Sri Lanka’s major distance education provider. Few people realize what it takes to provide distance education in an environment not geared to this form of teaching/learning – the volume of Information that has to be created, printed and delivered; the variety of timetables that have to be scheduled; the massive amount of continuous assessment assignments and tests that have to be prepared and sent out; the organization of a multitude of face-to face teaching sessions; the complex scheduling of examinations and tests – all this needed to be attended to for a student population of more than 20,000 and for 23 centres of study dotted across Sri Lanka.
It was an unenviable task but Nilanthi Jayasinghe with her flair for organization, handled it all with aplomb and a deep sense of commitment. If there were delays and inconclusive action on our part, she never reprimanded but would work with us to sort things out. Her work as Director, Operations brought her into contact with staff across the spectrum-from the Vice-Chancellor to the apprentice in the Open University’s Printing Press. Nilanthi treated everyone with dignity and as a result, was respected by all at the university. She was sensitive, kind-hearted, a good friend who would readily share problems and help to solve them. The year NIlanthi retired, I was out of the island. When I came back to the Open University, I felt bereft without the steadfast support of her stalwart presence .
The article in the ‘Sunday Island’ describes her life after retirement, looking after family members and enjoying the presence of a granddaughter.
After a lifetime of commitment to others, Nilanthi Jayasinghe truly deserved this happiness.
May she be blessed with peace.
Ryhana Raheem
Professor Emeritus
Open University of Sri Lanka.
Opinion
James Selvanathan Mather
James Mather (Selvan to all of us) who passed away recently at the age of 95 was one of the leading Chartered Accountants in the country. He was the senior partner of Ernst and Young for long years, and the mentor for a generation of chartered accountants. He was confidante and adviser to many of the leading businessmen of his time. His career spanned over six decades. A man who never sought the limelight, he was very influential in Ceylon/Sri Lanka’s business world.
Selvan Mather was born in 1930 to a well-known Christian family in Jaffna. His father, Rev. James Mather was Head of the Methodist Church in Ceylon. Selvan was educated at Trinity College Kandy, and he had a life-long connection with the school. He entered the University of Ceylon in the late 1940s, at a time when Ivor Jennings was Vice-Chancellor.
He read economics and passed out with an honours degree. For short periods he was in the Department of Income Tax and with the newly established Central Bank of Ceylon. The Central Bank facilitated him to go to England to qualify as a chartered accountant. His two referees, when seeking admission to an accountancy firm in the U.K. were M.D.H. Jayawardena, then Minister of Finance and the Auditor General of Ceylon, L.A. Weerasinghe. Being a chartered accountant was a rare event those days.
On his return from England, his career was with Ernst and Young where he became senior partner. He was close advisor and confidante to many of the leading businessmen. He was admitted to its Hall of Fame by the Institute of Chartered Accountants.
To strike a personal note, I got to know him 50 years ago when he applied for a fellowship given by the Asian Productivity Organisation (APO) in Tokyo. I was in the Ministry of Planning and Economic Affairs at the time, and the Ministry was handling APO affairs in Colombo. He told me later that he enjoyed his time in Tokyo. From that time, we kept up a friendship with him and Nelun, which lasted 50 years.
My wife, Rukmal, and I lived in Windsor England, for about 25 years. During that time, Nelun and Selvan were regular visitors to England. I remember taking him for long walks in Windsor Great Park, and on the grounds of Eton College which were nearby. We went on long car tours in England covering the Cotswolds, the Peak districts and the Potteries. I remember celebrating Selvan’s 70th birthday in London at a Greek restaurant, along with his great friends, Nihal and Doreen Vitarana. Memories remain, although Selvan is no more.
In the last decades of his life we saw Nelun and him often. A few of us, Manik de Silva, Nihal and Srima Seneviratne and a few others met regulsrly for lunch. We will all miss Selvan who was mine of his life and times very much.
Selvan leaves his wife Nelun and three children and their husbands – Rohan, Shyamala and Indi, and Rehana and Akram. It was a close-knit family and they will miss him.
Leelananda De Silva.
Opinion
War with Iran and unravelling of the global order – II
Broader Strategic Consequences
One of the most significant strategic consequences of the war is the accelerated erosion of U.S. political and moral hegemony. This is not a sudden phenomenon precipitated solely by the present conflict; rather, the war has served to illuminate an already evolving global reality—that the era of uncontested U.S. dominance is in decline. The resurgence of Donald Trump and the reassertion of his “America First” doctrine reflect deep-seated domestic economic and political challenges within the United States. These internal pressures have, in turn, shaped a more unilateral and inward-looking foreign policy posture, further constraining Washington’s capacity to exercise global leadership.
Moreover, the conduct of the war has significantly undermined the political and moral authority of the United States. Perceived violations of international humanitarian law, coupled with the selective application of international norms, have weakened the credibility of U.S. advocacy for a “rules-based international order.” Such inconsistencies have reinforced perceptions of double standards, particularly among states in the Global South. Skepticism toward Western normative leadership is expected to deepen, contributing to the gradual fragmentation of the international system. In this broader context, the ongoing crisis can be seen as symptomatic of a more fundamental transformation: the progressive waning of a global order historically anchored in U.S. hegemony and the emergence of a more contested and pluralistic international landscape.
The regional implications of the crisis are likely to be profound, particularly given the centrality of the Persian Gulf to the global political economy. As a critical hub of energy production and maritime trade, instability in this region carries systemic consequences that extend far beyond its immediate geography. Whatever may be the outcome, whether through the decisive weakening of Iran or the inability of external powers to dismantle its leadership and strategic capabilities, the post-conflict regional order will differ markedly from its pre-war configuration. In this evolving context, traditional power hierarchies, alliance structures, and deterrence dynamics are likely to undergo significant recalibration.
A key lesson underscored by the war is the deep interconnectivity of the contemporary global economic order. In an era of highly integrated production networks and supply chains, disruptions in a single strategic node can generate cascading effects across the global system. As such, regional conflicts increasingly assume global significance. The structural realities of globalisation make it difficult to contain economic and strategic shocks within regional boundaries, as impacts rapidly transmit through trade, energy, and financial networks. In this context, peace and stability are no longer purely regional concerns but global public goods, essential to the functioning and resilience of the international system
The conflict highlights the emergence of a new paradigm of warfare shaped by the integration of artificial intelligence, cyber capabilities, and unmanned systems. The extensive use of unmanned combat aerial vehicles (UCAVs)—a trend previously demonstrated in the Russia–Ukraine War—has been further validated in this theatre. However, unlike the Ukraine conflict, where Western powers have provided sustained military, technological, and financial backing, the present confrontation reflects a more direct asymmetry between a dominant global hegemon and a Global South state. Iran’s deployment of drone swarms and AI-enabled targeting systems illustrates that key elements of Fourth Industrial Revolution (4IR) warfare are no longer confined to technologically advanced Western states. These capabilities are increasingly accessible to Global South actors, lowering barriers to entry and significantly enhancing their capacity to wage effective asymmetric warfare. In this evolving context, technological diffusion is reshaping the strategic landscape, challenging traditional military hierarchies and altering the balance between conventional superiority and innovative, cost-effective combat strategies.
The war further exposed and deepened the weakening of global governance institutions, particularly the United Nations. Many of these institutions were established in 1945, reflecting the balance of power and geopolitical realities of the immediate post-Second World War era. However, the profound transformations in the international system since then have rendered aspects of this institutional architecture increasingly outdated and less effective.
The war has underscored the urgent need for comprehensive international governance reforms to ensure that international institutions remain credible, representative, and capable of addressing contemporary security challenges. The perceived ineffectiveness of UN human rights mechanisms in responding to violations of international humanitarian law—particularly in contexts such as the West Bank and the Gaza Strip, and more recently in Iran—has amplified calls for institutional renewal or the development of alternative frameworks for maintaining international peace and security. Moreover, the selective enforcement of international law and the persistent paralysis in conflict resolution mechanisms risk accelerating the fragmentation of global norms. If sustained, this trajectory would signal not merely the weakening but the possible demise of the so-called liberal international order, accelerating the erosion of both the legitimacy and the effective authority of existing multilateral institutions, and deepening the crisis of global governance.
Historically, major wars have often served as harbingers of new eras in international politics, marking painful yet decisive transitions from one order to another. Periods of systemic decline are typically accompanied by instability, uncertainty, and profound disruption; yet, it is through such crises that the contours of an emerging order begin to take shape. The present conflict appears to reflect such a moment of transition, where the strains within the existing global system are becoming increasingly visible.
Notably, key European powers are exhibiting a gradual shift away from exclusive reliance on the U.S. security umbrella, seeking instead a more autonomous and assertive role in global affairs. At the same time, the war is likely to create strategic space for China to expand its influence. As the United States becomes more deeply entangled militarily and politically, China may consolidate its position as a stabilising economic actor and an alternative strategic partner. This could be reflected in intensified energy diplomacy, expanded infrastructure investments, and a more proactive role in regional conflict management, advancing Beijing’s long-term objective of reshaping global governance structures.
However, this transition does not imply a simple replacement of Pax Americana with Pax Sinica. Rather, the emerging global order is likely to be more diffuse, pluralistic, and multilateral in character. In this sense, the ongoing transformation aligns with broader narratives of an “Asian Century,” in which power is redistributed across multiple centers rather than concentrated in a single hegemon. The war, therefore, may ultimately be understood not merely as a geopolitical crisis, but as a defining inflection point in the reconfiguration of the global order.
Conclusion: A New Era on the Horizon
History shows that major wars often signal the birth of new eras—painful, disruptive, yet transformative. The present conflict is no exception. It has exposed the vulnerabilities of the existing world order, challenged U.S. dominance, and revealed the limits of established global governance.
European powers are beginning to chart a more independent course, reducing reliance on the U.S. security umbrella, while China is poised to expand its influence as an economic stabiliser and strategic partner. Through energy diplomacy, infrastructure investments, and active engagement in regional conflicts, Beijing is quietly shaping the contours of a more multipolar world. Yet this is not the rise of Pax Sinica replacing Pax Americana. The emerging order is likely to be multilateral, fluid, and competitive—a world in which multiple powers, old and new, share the stage. The war, in all its turbulence, may therefore mark the dawn of a genuinely new global era, one where uncertainty coexists with opportunity, and where the next chapter of international politics is being written before our eyes.
by Gamini Keerawella
(First part of this article appeared yesterday (08 April)
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