Working with smallholders to understand their needs and build on their knowledge, CIMMYT brings the right seeds and inputs to local markets, raises awareness of more productive cropping practices, and works to bring local mechanization and irrigation services based on conservation agriculture practices. CIMMYT helps scale up farmers’ own innovations, and embraces remote sensing, mobile phones and other information technology. These interventions are gender-inclusive, to ensure equitable impacts for all.
Mustafa Kamal is a GIS and remote sensing analyst in CIMMYT, leading the GIS, remote sensing and data team in Bangladesh as part of the Sustainable Agrifood Systems (SAS) program’s Innovation Sciences in Agroecosystems and Food Systems theme across Asia.
Kamal’s core expertise is in earth observation and geospatial data science, scientific and cloud computing, webGIS, Unmanned Aerial Systems (UAS), advance landcover-landuse classification, and tool development. He contributes to research and innovation of irrigation and agro-meteorological advisory, crop identification and yield prediction, disaster and crop monitoring, landscape diversity, and climate analytics. He has published many peer-reviewed papers, reports, and training manuals, and provided teaching/training.
Kamal’s interdisciplinary background in urban and rural planning and disaster management helps him to integrate and lead an interdisciplinary team to provide solutions for sustainable agrifood systems.
How does CIMMYT’s improved maize get to the farmer?
CIMMYT is happy to announce a new, improved tropical maize hybrid that is now available for uptake by public and private sector partners, especially those interested in marketing or disseminating hybrid maize seed across rainfed tropics of South Asia and similar agro-ecologies. NARS and seed companies are hereby invited to apply for licenses to pursue national release and /or scale-up seed production and deliver these maize hybrids to farming communities.
The deadline to submit applications to be considered during the first round of allocations is 26 Aug 2022. Applications received after that deadline will be considered during subsequent rounds of product allocations.
The newly available CIMMYT maize hybrid, CIM19SADT-01, was identified through rigorous trialing and a stage-gate advancement process which started in 2019 and culminated in the 2020 and 2021 South Asia Regional On-Farm Trials for our South Asian Drought Tolerance (SADT) and Drought + Waterlogging Tolerance (SAWLDT) maize breeding pipelines. The product was found to meet the stringent performance criteria for CIMMYT’s SADT pipeline. While there is variation between different products coming from the same pipeline, the SADT pipeline is designed around the product concept described below:
Product Profile
Basic traits
Nice-to-have / Emerging traits
Target agroecologies
SADT (South Asian Drought Tolerance)
Medium maturing, yellow, high yielding, drought tolerant, and resistant to TLB and FSR
FER, BLSB, FAW
Semi-arid, rainfed, lowland tropics of South Asia, and similar agroecologies
Cooperative farmers receive training on operation of a mobile seed cleaner in Oromia, Ethiopia. (Credit: Dessalegn Molla/GIZ)
It’s a familiar problem in international agricultural development – a project with external funding and support has achieved impressive early results, but the money is running out, the time is growing short, and there’s not a clear plan in place to continue and extend the program’s success.
Over the past seven years, the German development agency Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) established Green Innovation Centers in 13 countries in Africa and two in Asia, partnering with the International Maize and Wheat Improvement Center (CIMMYT) to support projects that introduce mechanization in a way that improves long-term food security and prompts economic growth. Now, as the project enters its final two years of funding, GIZ and CIMMYT are focused on ensuring the gains produced by the Green Innovation Centers are not lost.
Like any complex challenge, there’s not just one solution to the sustainability problem – but CIMMYT is working to address a massive question around why pilots fail in agricultural development by implementing a systematic approach to scalability that recognizes the critical importance of context and puts projects on a sustainable path before the money is gone.
Training the trainers
As the Green Innovation Centers enter a crucial, final stage, a CIMMYT-led team recently completed training for seven GIZ staff from Ivory Coast, Togo, Ethiopia, and Zambia, who are now certified to facilitate CIMMYT’s Scaling Scan tool and train others to put agricultural innovations in their home countries on a solid path for growth. The training team included CIMMYT scaling advisor Lennart Woltering, CIMMYT mechanization support specialist Leon Jamann, and students from Germany’s University of Hohenheim and Weihenstephan-Triesdorf University.
The Scaling Scan is a practical tool that helps users set a defined growth ambition, analyze their readiness to scale using ten core ingredients, and identify specific areas that need attention in order to reach the scaling ambition.
The GIZ staff learned to use the Scaling Scan by applying it to early stage innovations in their home countries, ranging from commercial fodder production in the Southern Province of Zambia to seed value chains in the Oromia and Amhara regions of Ethiopia.
Mohammed, a farmer in Amhara, Ethiopia, with a fistful of wheat on his farm. (Credit: Mulugeta Gebrekidan/GIZ)
What will scale up in Ethiopia?
In Ethiopia, smallholding farmers producing legumes, wheat and maize struggle to increase their yield to a level that can improve food security, generate higher incomes for producers and their families, and promote economic growth and jobs in agricultural communities. To help smallholders develop sustainable solutions, GIZ senior advisor Molla Dessalegn worked with his Green Innovation Center team to brainstorm and launch a range of 20 proposed innovations – from risk mitigation and new contract structures to introduction of new technology – all with the aim of improving agricultural yields.
To date, these innovations have introduced over 200,000 Ethiopian smallholders to new knowledge and practices to improve their output. But with the project exit bearing down, Molla and his team were eager to identify which innovations held the most promise for survival and growth beyond the endpoint. So they put their pilot projects to the test using the Scaling Scan.
The scan involves an intensive, day-long seminar originally designed for in-person delivery, but remote versions have also proved successful as COVID limited global travel. The scan focuses on thorough analysis and scoring of the current state of a pilot project and its potential for growth given the realities of conditions on the ground.
Facilitators lead project managers through evaluation of the ten ingredients required for successful scaling, from finance and collaboration to technology, know-how, and public sector governance. The outcome is a clear data set assessing the scalability of the pilot and directing attention to specific areas where improvement is needed before a project can expect serious growth.
An unexpected outcome
What emerged from the scan surprised Molla. Some of the strategies he saw as most successful in the early stages, such as a contract farming program, scored poorly, whereas the scan identified deployment of mobile seed cleaners as a solution that held particular promise for scalability. These outcomes prompted the team to refocus efforts on this strategy.
About 95 percent of Ethiopian smallholders rely on informal seed systems, either saving and reusing seed or exchanging low quality seed with other farmers. Seed cleaning plays a critical role in helping farmers build a high quality, high yield seed development system. Molla and his team had already worked with smallholder cooperatives in Oromia to distribute three mobile seed cleaners, and they knew these machines were being heavily relied upon by farmers in this region.
The Scaling Scan showed them, among other things, that the successful adoption of the seed cleaners had even more potential – it was an innovation that could be sustained and even expanded by local stakeholders, including the Ministry of Agriculture.
This result prompted Molla to recommend investment in additional mobile seed cleaners – four to serve cooperatives in the Amhara region and a fifth for the West Arsi district in Oromia. These machines are now in operation and helping additional smallholders improve the quality of their seed stock. This initial expansion confirms the Scaling Scan results – and CIMMYT plans to continue supporting this growth with the purchase of another round of seed cleaners.
The Scaling Scan also identified problems with the business model for sustaining the mobile seed cleaners through cooperatives in Ethiopia, and this outcome directed the Green Innovation Centers to partner with a consultant to develop improvements in this area. In this way, one of the most important values of the scan is its ability to guide decision-making.
Scaling up the future
Seed cleaners alone won’t solve every yield problem for Ethiopian farmers, but the scan has now guided the initial implementation – and contextual adaptation – of a new form of agricultural mechanization across two regions of the country, with the promise of more to come.
And there’s more to come from the Scaling Scan as well.
Now that he’s received certification as a trainer, Molla plans to help farmers, officials, and other development workers adopt this rigorous approach to evaluating innovations that show potential. When funding for his project ends in 2024, he will be leaving 300,000 smallholders in Ethiopia with more than machines – he will be leaving them with the knowledge, experience, and practices to make the most of the technological solutions that are improving their yields today and building a more secure future for their communities.
Mobile phones are increasingly shaping the ways information is shared across industries, including in agriculture. The digitization of agricultural systems expedited by substantial efforts to narrow the digital divide and include smallholders means that data ownership and privacy issues are more relevant than ever.
The use of smartphone-based apps to improve accessibility to information for smallholder farmers has previously been under researched. In this publication, scientists from Ghent University and the International Maize and Wheat Improvement Center (CIMMYT) investigate incentives for smallholder farmers to use an agricultural advisory app in which data is shared using a designed discrete choice experiment.
Leveraging survey data from 392 farmers in Mexico, a conditional logit (CL) model was used to gain deeper insights into the preferences for attributes related to its usage. Groups and profiles were explored through a latent class (LC) model to investigate heterogeneity.
Farmers across ages were found to support the use of technology-based, site-specific extension services. The CL model results revealed farmers’ positive preference to receive support at first use and access to training, while they felt negatively towards sharing data with private actors. Meanwhile, the LC model demonstrates differences in preferences when farmers’ connectedness to the CIMMYT innovation hub and mastery approach goals variables are considered as a grouping variable. These variables also affect farmer preferences towards data sharing.
This study’s main contribution is in demonstrating the importance of nonfinancial incentives and influence of data sharing on farmer preferences. Through this improved understanding, the potential of technology in improving farmers’ welfare can be further realized.
Cover photo: María del Refugio Galván, a producer of barley from Irapuato, Guanajuato, Mexico, has been involved in the smartphone-app project. (Credit: Francisco Alarcón/CIMMYT)
Participants gather to discuss solutions to low levels of durum wheat cultivation in Ethiopia. (Credit: Enawgaw Shibeshi/CIMMYT)
Despite an increase in the total area used for growing wheat in Ethiopia, the share of durum wheat, the wheat used for pasta, has decreased substantially across the country. Smallholder farmers grow durum wheat on marginal lands for their own use but are not benefitting financially from cultivating the crop.
To understand factors contributing to low area coverage of durum wheat and identify opportunities for reinvigoration and improved marketing, the International Maize and Wheat Improvement Center (CIMMYT) hosted a workshop for stakeholders from the entire durum wheat value chain.
“New breeding technologies have great promise for expanding the area of durum wheat production,” said Moti Jaleta, agricultural economist at CIMMYT, “but this achievement remains primarily dependent on the market’s ability to purchase grains at a higher price to stimulate farmer adoption. The market in Ethiopia is not favoring durum wheat, so suppliers and extension workers must promote it very well.”
Rising consumption of durum wheat products such as pasta and macaroni is causing higher dependency on wheat imports. Reducing this reliance requires addressing the challenges facing Ethiopia’s durum wheat farmers in variety development and release, seed supply, crop management, level of productivity, market opportunities, and extension systems.
Kindie Tesfaye, scientist and crop modeler at CIMMYT, explained, “There is a need to improve the durum wheat seed system and extension service, enhance the development of new varieties with desired grain quality and create market linkages to meet the increasing durum wheat demand from the rapidly growing urban population and expanding agro-industrial parks.”
The potential of digital
As Ethiopia’s agricultural systems are highly dependent on rainfall, digital interventions can serve as key decision support tools to manage climate risk and bolster the adaptive capacity and productivity of smallholder farmers. CIMMYT collaborates with value chain-based digital agro-advisory services through the Digital Agricultural Advisory Services (DAAS) project, which runs multiple projects in Ethiopia to advance the use of digital tools in farming.
Taye Tadesse, director of crop research at the Ethiopian Institute of Agricultural Research, emphasized that the introduction of production technology should be participatory and customer-oriented to achieve the intended outcomes. Ensuring that technology is accessible is vital for strengthening the value chain system, he said.
Agreed actions from the workshop included focusing attention on the bodies responsible for the expansion of infrastructure and raising wheat farmers’ awareness of the value-adding tools available to them through training.
“We must ensure that farmers are the biggest decision-makers,” Tasfaye said.
“For several years, we’ve been building dense data sets with colleagues from the Indian Agricultural Research Council, which have allowed us to unravel complex farm realities through big data analytics, and to determine what agricultural management practices really matter in smallholder systems,” said Andrew McDonald ’94, M.S. ’98, Ph.D. ’03, associate professor of soil and crop sciences in the College of Agriculture and Life Sciences. “This process has confirmed that planting dates are the foundation for climate resilience and productivity outcomes in the dominant rice-wheat cropping systems in the eastern sector in India.”
The research was conducted through the Cereal Systems Initiative for South Asia (CSISA). CSISA, which is led by CIMMYT with the International Rice Research Institute and the International Food Policy Research Institute as research partners, was established in 2009 to promote durable change at scale in South Asia’s cereal-based cropping systems.
Researchers found that farmers in eastern India could increase yield by planting wheat earlier – avoiding heat stress as the crop matures – and quantified the potential gains in yields and farm revenues for the region. They also found that the intervention would not negatively impact rice productivity, a key consideration for farmers. Rice alternates with wheat on the cropping calendar, with many farmers growing rice in the wet season and wheat in the dry season.
The study also provides new recommendations for rice sowing dates and types of cultivars, to accommodate the earlier sowing of wheat.
“Farmers are not just managing single crops. They are managing a sequence of decisions,” said McDonald, who has a joint appointment in the Department of Global Development. “Taking a cropping systems approach and understanding how things cascade and interlink informs our research approach and is reflected in the recommendations that emerged from this analysis. Climate resilient wheat starts with rice.”
The research is the result of years of collaboration with international groups and government agencies in India, which have identified the Eastern Ganges Plain as the area with the most potential growth in production. The region will become essential, McDonald said, as the demand for wheat grows, and climate change makes production more difficult and unpredictable; just this year, record heat waves in March and April and food shortages caused by the war in Ukraine – both of which prompted India’s government to instate a ban on wheat exports – have highlighted the need for increased yields and more sustainable farming practices.
“In the bigger sense, this research is timely because the hazards of climate change aren’t just a hypothetical,” McDonald said. “Many of these areas are stress-prone environments, and extreme weather already constrains productivity. Identifying pragmatic strategies that help farmers navigate current extremes will establish a sound foundation for adapting to progressive climate change.”
Poverty is endemic in the Eastern Ganges Plain, and the region is dominated by small landholders, with varying practices and access to resources. The breadth and specificity of the data collected and analyzed in the study – including field and household survey data, satellite data, and dynamic crop simulations – allowed researchers to understand regional small farms’ challenges and the barriers to change.
“At the end of the day, none of this matters unless farmers opt in,” McDonald said. “There’s a spatial dimension and a household dimension to opportunity. If we can target approaches accordingly, then we hope to position farmers to make management changes that will benefit the entire food system.”
The study was co-authored with researchers from the Australian Department of Primary Industries and Regional Development, the International Rice Research Institute, the International Maize and Wheat Improvement Center, the International Food Policy Research Institute, the Indian Council of Agricultural Research and Bihar Agricultural University. The research was supported by the Bill and Melinda Gates Foundation and the U.S. Agency for International Development through grants to the Cereal Systems Initiative for South Asia, which is led by the International Maize and Wheat Improvement Center.
Institutionalizing Monitoring of Crop Variety Adoption using Genotyping (IMAGE) is a five-year program with the aim of establishing, institutionalizing, and scaling routine monitoring of improved variety adoption and turnover using genotyping.
It is led by country teams in Ethiopia, Nigeria and Tanzania, supported by Context Global Development and the Bill & Melinda Gates Foundation.
Reliable monitoring: IMAGE will assess the varieties that farmers are growing of four staple crops within the three target countries and marking the rate of improved variety adoption through recurring surveys and comparative analysis.
Vision for change: IMAGE supports inclusive agricultural transformation by providing insights and evidence for seed sector actors to enhance government agency capacity, improve stakeholder coordination, and lead to better resource allocation for varietal development and commercialization.
Project objectives:
Enable a national leadership mandate to monitor crop varieties and adoption
Build a network of technical experts and service providers to provide personalized advisory support
Establish best practices that enable routine monitoring and produce credible results
Form a sustainable funding mechanism based on use cases with government and stakeholder buy-in
Advocate for institutional capacity for reliable monitoring programs
IMAGE provides the opportunity to leverage past monitoring pilots and for cross-country learnings while advancing genetic reference libraries, establishing protocol adoption, and building towards institutionalization over five years. This is done through six objectives:
Comparable estimates of varietal adoption and turnover will be generated and made available to stakeholders
Standardization of best-practices and supporting technologies
Establishment of sustainable business cases
Pilot study results on varietal identity preservation in seed value chains for each country-crop combination
Institutionalized system of varietal monitoring for long-term, sustainable national partner implementation
Generated data used by seed sector stakeholders to make key decisions
Elufe Chipande (left), a farmer at Songani in Zomba District, Malawi, is rotating maize (background) and pigeonpea (foreground) under conservation agriculture practices to improve soil fertility and capture and retain more water. Christian Thierfelder (center), a cropping systems agronomist working out of the Zimbabwe office of CIMMYT, advises and supports southern African farmers and researchers to refine and spread diverse yield-enhancing, resource-conserving crop management practices. Photo: Mphatso Gama/CIMMYTSRUC
An international team of scientists has found that eco-friendly practices such as growing a range of crops, including legumes such as beans or pigeonpea, and adding plant residues or manure to soils can raise food crop yields in places such as rural Africa, where small-scale farmers cannot apply much nitrogen fertilizer.
Published in the science journal Nature Sustainability and examining data from 30 long-running field experiments involving staple crops (wheat, maize, oats, barley, sugar beet, or potato) in Europe and Africa, this major study is the first to compare farm practices that work with nature to increase yields and explore how they interact with fertilizer use and tillage.
“Agriculture is a leading cause of global environmental change but is also very vulnerable to that change,” said Chloe MacLaren, a plant ecologist at Rothamsted Research, UK, and lead author of the paper. “Using cutting-edge statistical methods to distill robust conclusions from divergent field experiment data, we found combinations of farming methods that boost harvests while reducing synthetic fertilizer overuse and other environmentally damaging practices.”
Recognizing that humanity must intensify production on current arable land to feed its rising numbers, the paper advances the concept of “ecological intensification,” meaning farming methods that enhance ecosystem services and complement or substitute for human-made inputs, like chemical fertilizer, to maintain or increase yields.
Boosting crop yields and food security for far-flung smallholders
The dataset included results from six long-term field experiments in southern Africa led by the International Maize and Wheat Improvement Center (CIMMYT). Africa’s farming systems receive on average only 17 kilograms of fertilizer per hectare, compared to more than 180 kilograms per hectare in Europe or close to 600 in China, according to Christian Thierfelder, a CIMMYT cropping systems agronomist and study co-author.
“In places where farmers’ access to fertilizer is limited, such as sub-Saharan Africa or the Central American Highlands, ecological intensification can complement scarce fertilizer resources to increase crop yields, boosting households’ incomes and food security,” Thierfelder explained. “We believe these practices act to increase the supply of nitrogen to crops, which explains their value in low-input agriculture.”
The CIMMYT long-term experiments were carried out under “climate-smart” conservation agriculture practices, which include reduced or no tillage, keeping some crop residues on the soil, and (again) growing a range of crops.
“These maize-based cropping systems showed considerable resilience against climate effects that increasingly threaten smallholders in the Global South,” Thierfelder added.
Benefits beyond yield
Besides boosting crop yields, ecological intensification can cut the environmental and economic costs of productive farming, according to MacLaren.
“Diversifying cropping with legumes can increase profits and decrease nitrogen pollution by reducing the fertilizer requirements of an entire crop rotation, while providing additional high-value food, such as beans,” MacLaren explained. “Crop diversity can also confer resilience to weather variability, increase biodiversity, and suppress weeds, crop pests and pathogens; it’s essential, if farmers are to improve maize production in places like Africa.”
Thierfelder cautioned that widespread adoption of ecological intensification will require strong support from policymakers and society, including establishing functional markets for legume seed and for marketing farmers’ produce, among other policy improvements.
“Dire and worsening global challenges — climate change, soil degradation and fertility declines, and scarcening fresh water — threaten the very survival of humanity,” said Thierfelder. “It is of utmost importance to renovate farming systems and bring us back into a safe operating space.”
Click here to read the paper, Long-term evidence for ecological intensification as a pathway to sustainable agriculture.
Timothy Reeves. (Photo: Courtesy of Tim Reeves/University of Melbourne)
Timothy Reeves, who served as director general of the International Maize and Wheat Improvement Center (CIMMYT) from 1995 to 2002, has been included in Queen Elizabeth II’s Birthday Honours List. He has been appointed a Member (AM) of the Order of Australia, for his significant service to sustainable agriculture research and production.
“I’m overwhelmed. I feel so honored and wish to also recognize the wonderful people that I have worked with — both farmers and scientists — here in Australia, and around the world. I also acknowledge my beautiful family without whom it would have not been possible,” he said.
Reeves was a pioneer of direct drilling and conservation agriculture in Australia in the 1960s and 70s. This method of planting crops which requires no cultivation of the land, is now the direct-drilling method used by 90% of farmers across Australian cropping regions. He and colleagues in the Victorian Department of Agriculture also worked at that time on the introduction of new crops into farming systems, including lupins, canola and faba beans.
Timothy Reeves (center) with C. Renard (left) and Norman Borlaug. (Photo: CIMMYT)
He was appointed to the role of director general of CIMMYT in 1995, based in Mexico for seven years, helping developing countries with food and nutritional security. He is the only Australian to have held this position.
Reeves is currently an Honorary Professorial Fellow at the Faculty of Veterinary and Agricultural Sciences, University of Melbourne. He is heavily involved with passing on his knowledge to his academic colleagues and to both undergraduate and postgraduate students. Reeves’s academic writings include publishing more than 180 papers, book chapters and articles. He is also a Chair of the Agriculture Forum of the Australian Academy of Technological Sciences and Engineering.
In just a decade, CRISPR has become one of the most celebrated inventions in modern biology. It is swiftly changing how medical researchers study diseases: Cancer biologists are using the method to discover hidden vulnerabilities of tumor cells. Doctors are using CRISPR to edit genes that cause hereditary diseases.
But CRISPR’s influence extends far beyond medicine. Evolutionary biologists are using the technology to study Neanderthal brains and to investigate how our ape ancestors lost their tails. Plant biologists have edited seeds to produce crops with new vitamins or with the ability to withstand diseases. Some of them may reach supermarket shelves in the next few years.
How does CIMMYT’s improved maize get to the farmer?
CIMMYT is proud to announce a new improved subtropical maize hybrid that is now available for uptake by public and private sector partners, especially those interested in marketing or disseminating hybrid maize seed across mid-altitudes of Mexico and similar agro-ecologies. National agricultural research systems (NARS) and seed companies are invited to apply for a license to commercialize this new hybrid to bring the benefits of the improved seed to farming communities.
The deadline to submit applications is 15 August 2022. Applications received after that date will be considered during the following round of product allocations.
The newly available CIMMYT maize hybrid, CIM20LAPP2B-2, was identified through rigorous trialing and a stage-gate advancement process that culminated in the 2020 Stage 5 trials for CIMMYT’s Latin American tropical mid-altitude maize breeding pipeline (LA-PP2B). While individual products will vary, the LA-PP2B pipeline aims to develop maize hybrids fitting the product profile described in the following table:
Product Profile
Basic traits
Nice-to-have / Emerging traits
Latin America Product Profile 2B (LA-PP2B)
Intermediate-maturing, yellow kernel, high-yielding, drought tolerant, resistant to FSR, GLS, and ear rots
TSC, TLB
Information about the newly available CIMMYT maize hybrid from the Latin America breeding program, application instructions, and other relevant material is available in the CIMMYT Maize Product Catalog and the links provided below.
For the first time ever, a biotechnology team has identified vegetative storage proteins (VSP) in maize and activated them in the leaves to stockpile nitrogen reserves for release when plants are hit by drought, which also causes nutrient stress, according to a recent report in Plant Biotechnology Journal. In two years of field testing, the maize hybrids overexpressing the VSP in leaf cells significantly out-yielded the control siblings under managed drought stress applied at the flowering time, according to Kanwarpal Dhugga, a principal scientist at the International Maize and Wheat Improvement Center (CIMMYT).
“One of the two most widely grown crops, maize increasingly suffers from erratic rainfall and scarcer groundwater for irrigation,” Dhugga said. “Under water stress, nitrogen availability to the plant is also attenuated. If excess nitrogen could be stored in the leaves during normal plant growth, it could help expedite the plant’s recovery from unpredictable drought episodes. In our experimental maize hybrids, this particular VSP accumulated to more than 4% in mesophyll cells, which is five times its normal levels, and offered an additional, dispensable source of nitrogen that buffered plants against water deficit stress.”
Dhugga noted as well that the study, whose authors include scientists from Corteva Agriscience, the Bill & Melinda Gates Foundation, and the US Department of Agriculture (USDA), provides experimental evidence for the link between drought tolerance and adequate nitrogen fertilization of crop plants. “This mechanism could also help farmers and consumers in sub-Saharan Africa, where maize is grown on nearly 40 million hectares, accounts for almost one-third of the region’s caloric intake, and frequently faces moderate to severe drought.”
Scientists multiply and power up vegetative storage proteins in maize leaves as nutrient stockpiles for drought-stressed maize crops. Graphic adapted from: Pooja Gupta, Society for Experimental Biology (SEB).
A climate change hotspot region that features both small-scale and intensive farming, South Asia epitomizes the crushing pressure on land and water resources from global agriculture to feed a populous, warming world. Continuous irrigated rice and wheat cropping across northern India, for example, is depleting and degrading soils, draining a major aquifer, and producing a steady draft of greenhouse gases.
Through decades-long Asian and global partnerships, the International Maize and Wheat Improvement Center (CIMMYT) has helped to study and promote resource-conserving, climate-smart solutions for South Asian agriculture. Innovations include more precise and efficient use of water and fertilizer, as well as conservation agriculture, which blends reduced or zero-tillage, use of crop residues or mulches as soil covers, and more diverse intercrops and rotations. Partners are recently exploring regenerative agriculture approaches — a suite of integrated farming and grazing practices to rebuild the organic matter and biodiversity of soils.
Along with their environmental benefits, these practices can significantly reduce farm expenses and maintain or boost crop yields. Their widespread adoption depends in part on enlightened policies and dedicated promotion and testing that directly involves farmers. We highlight below promising findings and policy directions from a collection of recent scientific studies by CIMMYT and partners.
Getting down in the dirt
A recent scientific review examines the potential of a suite of improved practices — reduced or zero-tillage with residue management, use of organic manure, the balanced and integrated application of plant nutrients, land levelling, and precise water and pest control — to capture and hold carbon in soils on smallholder farms in South Asia. Results show a potential 36% increase in organic carbon in upper soil layers, amounting to some 18 tons of carbon per hectare of land and, across crops and environments, potentially cutting methane emissions by 12%. Policies and programs are needed to encourage farmers to adopt such practices.
Another study on soil quality in India’s extensive breadbasket region found that conservation agriculture practices raised per-hectare wheat yields by nearly half a ton and soil quality indexes nearly a third, over those for conventional practices, as well as reducing greenhouse gas emissions by more than 60%.
Ten years of research in the Indo-Gangetic Plains involving rice-wheat-mungbean or maize-wheat-mungbean rotations with flooded versus subsoil drip irrigation showed an absence of earthworms — major contributors to soil health — in soils under farmers’ typical practices. However, large earthworm populations were present and active under climate-smart practices, leading to improved soil carbon sequestration, soil quality, and the availability of nutrients for plants.
The field of farmer Ram Shubagh Chaudhary, Pokhar Binda village, Maharajganj district, Uttar Pradesh, India, who has been testing zero tillage to sow wheat directly into the unplowed paddies and leaving crop residues, after rice harvest. Chaudhary is one of many farmer-partners in the Cereal Systems Initiative for South Asia (CSISA), led by CIMMYT. (Photo: P. Kosina/CIMMYT)
Rebooting marginal farms by design
Using the FarmDESIGN model to assess the realities of small-scale, marginal farmers in northwestern India (about 67% of the population) and redesign their current practices to boost farm profits, soil organic matter, and nutritional yields while reducing pesticide use, an international team of agricultural scientists demonstrated that integrating innovative cropping systems could help to improve farm performance and household livelihoods.
More than 19 gigatons of groundwater is extracted each year in northern India, much of this to flood the region’s puddled, transplanted rice crops. A recent experiment calibrated and validated the HYDRUS-2D model to simulate water dynamics for puddled rice and for rice sown in non-flooded soil using zero-tillage and watered with sub-surface drip irrigation. It was found that the yield of rice grown using the conservation agriculture practices and sub-surface drip irrigation was comparable to that of puddled, transplanted rice but required only half the irrigation water. Sub-surface drip irrigation also curtailed water losses from evapotranspiration and deep drainage, meaning this innovation coupled with conservation agriculture offers an ecologically viable alternative for sustainable rice production.
Given that yield gains through use of conservation agriculture in northern India are widespread but generally low, a nine-year study of rice-wheat cropping in the eastern Indo-Gangetic Plains applying the Environmental Policy Climate (EPIC) model, in this case combining data from long-term experiments with regionally gridded crop modeling, documented the need to tailor conservation agriculture flexibly to local circumstances, while building farmers’ capacity to test and adapt suitable conservation agriculture practices. The study found that rice-wheat productivity could increase as much as 38% under conservation agriculture, with optimal management.
Key partner organizations in this research include the following: Indian Council of Agricultural Research (ICAR); Central Soil Salinity Research Institute (CSSRI), Indian Agricultural Research Institute (IARI), Indian Institute of Farming Systems Research (IIFSR), Agriculture University, Kota; CCS Haryana Agricultural University, Hisar; Punjab Agricultural University, Ludhiana; Sri Karan Narendra Agriculture University, Jobner, Rajasthan; the Borlaug Institute for South Asia (BISA); the Trust for Advancement of Agricultural Sciences, Cornell University; Damanhour University, Damanhour, Egypt; UM6P, Ben Guerir, Morocco; the University of Aberdeen; the University of California, Davis; Wageningen University & Research; and IFDC.
Generous funding for the work cited comes from the Bill & Melinda Gates Foundation, The CGIAR Research Programs on Wheat Agri-Food Systems (WHEAT) and Climate Change, Agriculture and Food Security (CCAFS), supported by CGIAR Fund Donors and through bilateral funding agreements), The Indian Council of Agricultural Research (ICAR), and USAID.
Cover photo: A shortage of farm workers is driving the serious consideration by farmers and policymakers to replace traditional, labor-intensive puddled rice cropping (shown here), which leads to sizable methane emissions and profligate use of irrigation water, with the practice of growing rice in non-flooded soils, using conservation agriculture and drip irrigation practices. (Photo: P. Wall/CIMMYT)
Written by Bea Ciordia on . Posted in Uncategorized.
The Nitrogen-Efficient Wheat Production Systems in the Indo-Gangetic Plains through Biological Nitrification Inhibition (BNI) Technology project aims to raise awareness of the benefits of new nitrogen-efficient wheat production systems among stakeholders in India.
By introducing technologies that maintain crop yield and quality, even with a reduced amount of nitrogen fertilizer, this project will also lessen the footprint of food production systems and combat environmental degradation.
Written by Bea Ciordia on . Posted in Uncategorized.
MARPLE (Mobile And Real-time PLant disEase) diagnostics is a new innovative approach for fungal crop pathogen diagnostics developed by Diane Saunders’s team at the John Innes Centre.
MARPLE is the first operational system in the world using nanopore sequencing for rapid diagnostics and surveillance of complex fungal pathogens in situ. Generating results in 48 hours of field sampling, this new digital diagnostic strategy is leading revolutionary changes in plant disease diagnostics. Rapid strain level diagnostics are essential to quickly find new emergent strains and guide appropriate control measures.
Through this project, CIMMYT will:
Deploy and scale MARPLE to priority geographies and diseases as part of the Current and Emerging Threats to Crops Innovation Lab led by Penn State University / PlantVillage and funded by USAID’s Feed the Future.
Build national partner capacity for advanced disease diagnostics. We will focus geographically on Ethiopia, Kenya and Nepal for deployment of wheat stripe and stem rust diagnostics, with possible expansion to Bangladesh and Zambia (wheat blast).
Integrate this new in-country diagnostic capacity with recently developed disease forecasting models and early warning systems. Already functional for wheat stripe rust, the project plans to expand MARPLE to incorporate wheat stem rust and wheat blast.
