̽��ֱ�� of Cambridge - Sustainable agriculture

Birdlife soars on nature-friendly solar farms

plc32 — Thu, 13 Feb 2025 09:46:57 +0000

Birds across Eastern England's arable landscapes are thriving on solar farms managed with nature in mind.

Innovation for Africa's Climate Future

plc32 — Wed, 25 Sep 2024 10:07:20 +0000

̽��ֱ��2024 Mastercard Foundation Scholars Program at the ̽��ֱ�� of Cambridge Entrepreneurship Prize Competition recognises innovative ideas in agriculture, women’s health and digital technology.

Transition Live: Park Farm

plc32 — Tue, 14 May 2024 14:18:35 +0000

̽��ֱ�� of Cambridge's Park Farm hosted one of the most important new agricultural events on the UK farming calendar this month.

Innovative aquaculture system turns waste wood into nutritious seafood

jg533 — Mon, 20 Nov 2023 10:00:05 +0000

These long, white saltwater clams are the world’s fastest-growing bivalve and can reach 30cm long in just six months. They do this by burrowing into waste wood and converting it into highly-nutritious protein.

̽��ֱ��researchers found that the levels of Vitamin B12 in the Naked Clams were higher than in most other bivalves – and almost twice the amount found in blue mussels.

And with the addition of an algae-based feed to the system, the Naked Clams can be fortified with omega-3 polyunsaturated fatty acids - nutrients essential for human health.

Shipworms have traditionally been viewed as a pest because they bore through any wood immersed in seawater, including ships, piers and docks.

̽��ֱ��researchers developed a fully-enclosed aquaculture system that can be completely controlled, eliminating the water quality and food safety concerns often associated with mussel and oyster farming.

And the modular design means it can be used in urban settings, far from the sea.

“Naked Clams taste like oysters, they’re highly nutritious and they can be produced with a really low impact on the environment,” said Dr David Willer, Henslow Research Fellow at the ̽��ֱ�� of Cambridge’s Department of Zoology and first author of the report.

He added: “Naked Clam aquaculture has never been attempted before. We’re growing them using wood that would otherwise go to landfill or be recycled, to produce food that’s high in protein and essential nutrients like Vitamin B12.”

Scientifically named Teredinids, these creatures have no shell, but are classed as bivalve shellfish and related to oysters and mussels.

Because the Naked Clams don’t put energy into growing shells, they grow much faster than mussels and oysters which can take two years to reach a harvestable size.

̽��ֱ��report is published today in the journal Sustainable Agriculture.

Wild shipworms are eaten in the Philippines - either raw, or battered and fried like calamari. But for British consumers, the researchers think Naked Clams will be more popular as a ‘white meat’ substitute in processed foods like fish fingers and fishcakes.

“We urgently need alternative food sources that provide the micronutrient-rich profile of meat and fish but without the environmental cost, and our system offers a sustainable solution,” said Dr Reuben Shipway at the ̽��ֱ�� of Plymouth’s School of Biological & Marine Sciences, senior author of the report.

He added: “Switching from eating beef burgers to Naked Clam nuggets may well become a fantastic way to reduce your carbon footprint.”

̽��ֱ��research is a collaboration between the Universities of Cambridge and Plymouth, and has attracted funding from sources including ̽��ֱ��Fishmongers’ Company, British Ecological Society, Cambridge Philosophical Society, Seale-Hayne Trust, and BBSRC

̽��ֱ��team is now trialling different types of waste wood and algal feed in their system to optimise the growth, taste and nutritional profile of the Naked Clams – and is working with Cambridge Enterprise to scale-up and commercialise the system.

Reference

Willer, D F et al: ‘Naked Clams to open a new sector in sustainable nutritious food production.’ Sustainable Agriculture, Nov 23. DOI: 10.1038/s44264-023-00004-y

Researchers hoping to rebrand a marine pest as a nutritious food have developed the world’s first system of farming shipworms, which they have renamed ‘Naked Clams’.

Naked Clams taste like oysters, they’re highly nutritious and they can be produced with a really low impact on the environment.

Dr David Willer

̽��ֱ�� of Plymouth

Naked Clams in wooden growth panel

̽��ֱ��text in this work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Images, including our videos, are Copyright © ̽��ֱ�� of Cambridge and licensors/contributors as identified. All rights reserved. We make our image and video content available in a number of ways – as here, on our main website under its Terms and conditions, and on a range of channels including social media that permit your use and sharing of our content under their respective Terms.

Yes

Companies’ zero-deforestation commitments have potential to halve cattle-driven deforestation in Brazilian Amazon

jg533 — Wed, 19 Apr 2023 23:01:02 +0000

Cattle-rearing is the biggest cause of tropical deforestation in the Amazon - and the world.

A study has found that some of the world’s largest slaughterhouses reduced cattle-driven deforestation in the Amazon by 15% - equivalent to sparing 7,000km2 of forest from clearance (4.5 times the size of London) - through their commitment to zero-deforestation policies between 2010 and 2018.

If these policies were fully implemented and adopted across all cattle companies operating in the Amazon, 24,000km2 of forest (an area larger than Wales) could have been spared over this time, effectively halving cattle-driven deforestation in Brazil.

Deforestation is the second largest contributor to global greenhouse gas emissions after fossil fuel use, and the Brazilian Amazon is the world’s deforestation hotspot.

Zero-deforestation commitments are supply chain policies aiming to ensure production of goods does not involve deforestation, by identifying and dropping suppliers who produce on areas recently cleared of natural vegetation. ̽��ֱ��commitments have been signed by many leading UK beef retailers, including the supermarkets Tesco, Sainsbury’s, and Waitrose.

Although the UK imported 60 million tonnes of Brazilian beef in 2017, according to the National Beef Association the UK is 75% self-sufficient for beef. Many British companies are increasingly turning away from Brazilian beef due to the perceived risk of deforestation. But the researchers argue that this is not the best approach.

“We can benefit the climate by eating less meat in general. But when it comes to deforestation, the solution is not to avoid beef from specific countries – because then we lose our power to make a difference in those places,” said Professor Rachael Garrett, Moran Professor of Conservation and Development at the ̽��ֱ�� of Cambridge Conservation Research Institute, senior author of the report.

She added: “If we do eat imported beef, we should buy it from retailers that are trying to improve cattle production systems in Brazil and elsewhere. If enough countries join the UK and EU in purchasing only deforestation-free beef it’s likely to have a positive impact on the planet by reducing deforestation.”

̽��ֱ��results are published today in the journal Global Environmental Change.

Due to the complexity of Brazilian supply chains and incomplete availability of public records, it has been challenging until now to determine how much of the cattle in any given region was being purchased by companies with zero-deforestation commitments. This impeded efforts to analyse the effectiveness of zero-deforestation policies linked to beef and leather goods - such as shoes and handbags.

̽��ֱ��researchers traced the links between farming regions, slaughterhouses and companies with zero-deforestation commitments in the Brazilian Amazon cattle sector, to see how these links influenced deforestation.

An agreement called G4 is the most widespread and strongly implemented zero-deforestation commitment for cattle in the Brazilian Amazon – accounting for over 99% of cattle exports. ̽��ֱ��study focused on companies that have adopted the G4 Agreement, and found they were associated with substantial reductions in deforestation.

“We’ve shown that zero-deforestation policies are having an important - and measurable – impact in protecting forests, and that with widespread adoption and rigorous implementation they could achieve a lot more,” said Garrett.

She added: “Even reducing deforestation by 15% is a huge amount. But this result shows that supply chain policies have significant limitations, and we need to couple them with more visionary approaches to help countries like Brazil improve their agricultural systems.”

̽��ֱ��researchers say a mix of interventions by the private and public sector is needed to improve cattle-rearing practices and help eliminate deforestation in countries like Brazil.

Public sector interventions could include support for alternative economic activities, and financial incentives or greater pressure to avoid deforestation from the Brazilian government.

“With this evidence, supermarkets can use their influence to help improve Brazilian cattle production. But more needs to be done to improve the rigour of corporate policies and the market coverage of policy adopters, even in relatively well-covered regions such as the Brazilian Amazon,” said Dr Sam Levy at ETH Zurich and New York ̽��ֱ��, lead author of the report.

Cattle production for beef and leather is the cause of over 70% of all deforestation in the Amazon – much of which is illegal. Zero-deforestation commitments cover 82% of beef exported from the Brazilian Amazon for trade internationally – but a large amount of beef production destined for Brazil’s domestic markets is not covered.

Deforestation causes the loss of diverse animal and plant life, threatens the livelihoods of indigenous groups, and increases inequality and conflict.

In 2021, the COP26 Glasgow Leaders’ Declaration on Forests and Land Use committed to halt and reverse deforestation by 2030. It was signed by over 100 countries, representing 85% of global forests.

̽��ֱ��research was funded by the National Science Foundation, Gordon and Betty Moore Foundation, and the European Research Council.

Reference

Levy, S A et al: ‘Deforestation in the Brazilian Amazon could be halved by scaling up implementation of zero-deforestation cattle commitments.’ Global Environmental Change, April 2023. DOI: 10.1016/j.gloenvcha.2023.102671

Study shows better adoption and implementation of company supply chain policies for Brazilian beef and leather could significantly reduce carbon emissions

If we do eat imported beef, we should buy it from retailers that are trying to improve cattle production systems in Brazil and elsewhere.

Rachael Garrett

Bruno Kelly / Greenpeace

Cattle in the Amazon

Yes

Licence type:

Attribution-Noncommerical

Fixing the Fens

jg533 — Fri, 14 Apr 2023 08:20:08 +0000

Reconciling human activities with nature is never going to be easy, but a new Cambridge group is using everything it’s got to try and protect a vital part of the UK.

Carbon emissions from fertilisers could be reduced by as much as 80% by 2050

sc604 — Thu, 09 Feb 2023 15:48:50 +0000

̽��ֱ��researchers, from the ̽��ֱ�� of Cambridge, found that two-thirds of emissions from fertilisers take place after they are spread on fields, with one-third of emissions coming from production processes.

Although nitrogen-based fertilisers are already known to be a major source of greenhouse gas emissions, this is the first time that their overall contribution, from production to deployment, has been fully quantified. Their analysis found that manure and synthetic fertilisers emit the equivalent of 2.6 gigatonnes of carbon per year – more than global aviation and shipping combined.

Carbon emissions from fertilisers urgently need to be reduced; however, this must be balanced against the need for global food security. Earlier research has estimated that 48% of the global population is fed with crops grown with synthetic fertilisers, and the world’s population is expected to grow by 20% by 2050.

̽��ֱ��Cambridge researchers say that a combination of scalable technological and policy solutions are needed to reduce fertiliser emissions while maintaining food security. However, they estimate that if such solutions could be implemented at scale, the emissions from manure and synthetic fertilisers could be reduced by as much as 80%, to one-fifth of current levels, without a loss of productivity. Their results are reported in the journal Nature Food.

“Incredibly, we don’t actually know how many chemicals we produce globally, where they end up, where and how they accumulate, how many emissions they produce, and how much waste they generate,” said co-author Dr André Cabrera Serrenho from Cambridge’s Department of Engineering.

Serrenho and his co-author Yunhu Gao undertook a project to accurately measure the total impacts of fertilisers, one of the two main products of the petrochemical industry. Of all the products made by the petrochemical industry, the vast majority – as much as 74% – are either plastics or fertilisers.

“In order to reduce emissions, it’s important for us to identify and prioritise any interventions we can make to make fertilisers less harmful to the environment,” said Serrenho. “But if we’re going to do that, we first need to have a clear picture of the whole lifecycle of these products. It sounds obvious, but we actually know very little about these things.”

̽��ֱ��researchers mapped the global flows of manure and synthetic fertilisers and their emissions for 2019, along all stages of the lifecycle, by reconciling the production and consumption of nitrogen fertilisers and regional emission factors across nine world regions.

After completing their analysis, the researchers found that unlike many other products, the majority of emissions for fertilisers occur not during production, but during their use.

“It was surprising that this was the major source of emissions,” said Serrenho. “But only after quantifying all emissions, at every point of the lifecycle, can we then start looking at different mitigation methods to reduce emissions without a loss of productivity.”

̽��ֱ��researchers listed and quantified the maximum theoretical impact of different mitigation methods – most of these are already known, but their maximum potential effect had not been quantified.

Emissions from the production of synthetic fertilisers are mostly from ammonia synthesis, partly due to chemical reactions used in the production process. ̽��ֱ��most effective mitigation at the production stage would be for the industry to decarbonise heating and hydrogen production. Additionally, fertilisers could be mixed with chemicals called nitrification inhibitors, which prevent bacteria from forming nitrous oxide. However, these chemicals are likely to make fertilisers more expensive.

“If we’re going to make fertilisers more expensive, then there needs to be some sort of financial incentive to farmers and to fertiliser companies,” said Serrenho. “Farming is an incredibly tough business as it is, and farmers aren’t currently rewarded for producing lower emissions.”

̽��ֱ��single most effective way to reduce fertiliser-associated emissions, however, would be to reduce the amount of fertilisers that we use. “We’re incredibly inefficient in our use of fertilisers,” said Serrenho. “We’re using far more than we need, which is economically inefficient and that’s down to farming practices. If we used fertiliser more efficiently, we would need substantially less fertiliser, which would reduce emissions without affecting crop productivity.”

̽��ֱ��researchers also looked at the mix of fertilisers used around the world, which varies by region. ̽��ֱ��researchers say that replacing some of the fertilisers with the highest emissions, such as urea, with ammonium nitrate worldwide could further reduce emissions by between 20% and 30%. However, this would only be beneficial after decarbonising the fertiliser industry.

“There are no perfect solutions,” said Serrenho. “We need to rethink how we produce food, and what sorts of economic incentives work best. Perhaps that means paying farmers to produce fewer emissions, perhaps that means paying more for food. We need to find the right mix of financial, technological and policy solutions to reduce emissions while keeping the world fed.”

Serrenho and Gao estimate that by implementing all the mitigations they analysed, emissions from the fertiliser sector could be reduced by as much as 80% by 2050.

“Our work gives us a good idea of what’s technically possible, what’s big, and where interventions would be meaningful – it’s important that we aim interventions at what matters the most, in order to make fast and meaningful progress in reducing emissions,” said Serrenho.

̽��ֱ��research was part of the C-THRU project, led by Professor Jonathan Cullen, where researchers from four UK and US Universities are working to bring clarity to the emissions from the global petrochemical supply chain.

Reference:
Yunhu Gao and André Cabrera Serrenho. ‘Greenhouse gas emissions from nitrogen fertilisers could be reduce by up to one-fifth of current levels by 2050 with combined interventions.’ Nature Food (2023). DOI: 10.1038/s43016-023-00698-w

Researchers have calculated the carbon footprint for the full life cycle of fertilisers, which are responsible for approximately five percent of total greenhouse gas emissions – the first time this has been accurately quantified – and found that carbon emissions could be reduced to one-fifth of current levels by 2050.

Our work gives us a good idea of what’s technically possible, and where interventions would be meaningful – it’s important that we aim interventions at what matters the most, in order to make fast and meaningful progress in reducing emissions

André Cabrera Serrenho

SteveAllenPhoto via Getty Images

Spraying fertiliser on wheat crop - North Yorkshire - England.

̽��ֱ��text in this work is licensed under a Creative Commons Attribution 4.0 International License. Images, including our videos, are Copyright © ̽��ֱ�� of Cambridge and licensors/contributors as identified. All rights reserved. We make our image and video content available in a number of ways – as here, on our main website under its Terms and conditions, and on a range of channels including social media that permit your use and sharing of our content under their respective Terms.

Yes

Cambridge-led consortium receives $35m to boost crop production sustainably in sub-Saharan Africa

cg605 — Tue, 31 Jan 2023 09:13:50 +0000

̽��ֱ��grant, from Bill & Melinda Gates Agricultural Innovations (Gates Ag One), will enable researchers led by the ̽��ֱ�� of Cambridge Crop Science Centre to engineer plants to take advantage of naturally occurring interactions with micro-organisms – fungi and bacteria – that help in the uptake of nutrients from the soil and air.

“African agriculture is at an inflection point, with vastly increasing demand at a time when supply is at risk, especially due to a changing climate,” said Giles Oldroyd, Director of the Crop Science Centre and Russell R Geiger Professor of Crop Science.

“ ̽��ֱ��outcomes of this work have the potential to see gains as great as those from the Green Revolution, but without relying on costly and polluting inorganic fertilisers.

“Increasing sustainable production of crops in small-holder farming systems, like those in sub-Saharan Africa, directly addresses some of the worst poverty on the planet.”

Nutrients are vital to the success of crops. However, the land of small-scale farmers in sub-Saharan Africa is depleted of nutrients. Artificial fertilisers are too expensive for small-scale farmers to buy, and their livestock numbers too low to produce sufficient levels of manure to nourish their crops. This leads to deceasing yields overtime, which affects livelihoods. Average maize productivity in sub-Saharan Africa is less than a quarter of that in the USA.

Engineering Nutrient Symbioses in Agriculture (ENSA) research programme utilises natural symbioses between plants, soil fungi and bacteria, that deliver nutrients to the plant. By leveraging these relationships ENSA aims to engineer crops to make better use of nutrients already present in the air and the soil. This would allow sustainable increases in crop yields, potentially revolutionising smallholder farming in low-and-middle-income-countries, while providing a viable solution to sustainable and secure food production in high-income countries.

̽��ֱ��grant funds the ENSA research programme. ENSA is a Cambridge-led international collaboration with partners: ̽��ֱ�� of Oxford, UK; NIAB, UK; Royal Holloway ̽��ֱ�� of London, UK; Aarhus ̽��ֱ��, Denmark; Wageningen ̽��ֱ�� and Research, ̽��ֱ��Netherlands; ̽��ֱ�� of Freiburg, Germany; ̽��ֱ�� of Toulouse III Paul Sabatier, France; ̽��ֱ�� of Illinois, USA; Pennsylvania State ̽��ֱ��, USA.

A not-for-profit subsidiary of the Bill & Melinda Gates Foundation, Gates Ag One was created to leverage global crop science to meet the needs of smallholder farmers in sub-Saharan Africa and South Asia. It focuses on accelerating research that enhances the biological processes of six priority food crops: cassava, cowpea, maize, rice, sorghum, and soybean.

“ ̽��ֱ��pioneering work of ENSA is fundamental to levelling the playing field for smallholder farmers in Africa, leveraging the latest crop technology to ensure all communities have the chance to thrive,” said Joe Cornelius, CEO of Gates Ag One. “Breakthrough advances in crop science and innovation mean intractable challenges like nutrient uptake and soil health need not hold back agricultural development. We’re delighted that Gates Ag One can support ENSA to continue its work to meet the needs of smallholder farmers.”

A Cambridge-led consortium has received US$35m (£28m) over five years to develop sustainable solutions to increasing the yields of small-scale farmers in sub-Saharan Africa, without the need for costly and polluting inorganic fertilisers.

Increasing sustainable production of crops in small-holder farming systems, like those in sub-Saharan Africa, directly addresses some of the worst poverty on the planet.

Giles Oldroyd

̽��ֱ��Crop Science Centre

Checking the progress of an ENSA related field trial of barley in Cambridge

Yes