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Theme: Climate adaptation and mitigation

Climate change threatens to reduce global crop production, and poor people in tropical environments will be hit the hardest. More than 90% of CIMMYT’s work relates to climate change, helping farmers adapt to shocks while producing more food, and reduce emissions where possible. Innovations include new maize and wheat varieties that withstand drought, heat and pests; conservation agriculture; farming methods that save water and reduce the need for fertilizer; climate information services; and index-based insurance for farmers whose crops are damaged by bad weather. CIMMYT is an important contributor to the CGIAR Research Program on Climate Change, Agriculture and Food Security.

MasAgro Farmer

MasAgro Farmer, a component of CIMMYT’s MasAgro project, develops a sustainable intensification strategy for maize, wheat and similar grains by building hubs based on research platforms, demonstration modules and extension areas where sustainable farming practices and technologies are tested, improved and adapted. In 2015, main achievements included:

  • Average maize and wheat yields obtained by farmers participating in MasAgro were 20.5 percent and 2.8 percent higher, respectively, than the average yields achieved in the regions of Mexico where they live.
  • The average net income of maize and wheat farmers participating in MasAgro was 23 percent and 4 percent higher, respectively, than the average net incomes of their region in Mexico.
  • MasAgro set up 12 hubs with 43 research platforms and 452 demonstration modules that developed, tested, adapted and disseminated sustainable farming practices and technologies.
  • 46 technicians were certified in sustainable agriculture and another 55 begun their training in 2015. CIMMYT has so far certified 294 MasAgro technicians.
  • 4,009 extension areas were registered in MasAgro’s electronic field books.
  • MasAgro experts developed 17 new machinery prototypes and produced 26 precision farming tools and machines for sustainable farming of maize, wheat and similar grains.

OBJECTIVES

  • To promote conservation and precision agriculture practices to sustainably increase maize and wheat production in Mexico.
  • To develop skills and to transfer knowledge and technologies specifically adapted to meet the needs of the small scale farmer.
  • To reduce the impact of climate change in agriculture.

MasAgro Biodiversidad

MasAgro Biodiversidad (Biodiversity), a component of CIMMYT’s MasAgro project, studies and characterizes maize and wheat genetic diversity for use in breeding programs, which develop wheat varieties and maize hybrids improved through conventional technologies. These hybrids are better adapted to climate change, more resistant to pests and diseases and have higher yield potential.

In 2015, MasAgro Biodiversity’s main results were:

  • MasAgro Biodiversity began a comprehensive study of maize genetic diversity by obtaining, processing and analyzing the world’s largest genotypic data set to help scientists identify new genes of interest for maize breeding programs.
  • More than 2 billion genotypic data and more than 870,000 phenotypic data of maize field trails have been processed and uploaded to MasAgro Biodiversity’s database and repository making them available to the scientific community via the project website.
  • A high level of Tar Spot resistance was confirmed in maize landraces native to the state of Oaxaca in Mexico and Guatemala, which will be used to breed new resistant maize lines.

To order seeds from CIMMYT, please fill a seed request.

OBJECTIVES

  • To explore in depth the original genetic composition of maize and wheat through the analysis of hundreds of thousands of seeds stored in gene banks in Mexico.
  • To make available to the national and international scientific community information on key agronomic characteristics such as tolerance to heat and drought, or resistance to important pests.
  • To offer a genetic analysis service that taps on the best features of maize and wheat through conventional improvement programs for both grains.
  • To contribute to long term food security in Mexico and the rest of the world, despite the impact of climate change and the scarcity of natural resources such as water, nutrients and oil.

Sustainable and Resilient Farming Systems Intensification in the Eastern Gangetic Plains (SRFSI)

The Eastern Gangetic Plains region of Bangladesh, India, and Nepal is home to the greatest concentration of rural poor in the world. This region is projected to be one of the areas most affected by climate change. Local farmers are already experiencing the impact of climate change: erratic monsoon rains, floods and other extreme weather events have affected agricultural production for the past decade. The region’s smallholder farming systems have low productivity, and yields are too variable to provide a solid foundation for food security. Inadequate access to irrigation, credit, inputs and extension systems limit capacity to adapt to climate change or invest in innovation. Furthermore, large-scale migration away from agricultural areas has led to labor shortages and increasing numbers of women in agriculture.

The Sustainable and Resilient Farming Systems Intensification (SRFSI) project aims to reduce poverty in the Eastern Gangetic Plains by making smallholder agriculture more productive, profitable and sustainable while safeguarding the environment and involving women. CIMMYT, project partners and farmers are exploring Conservation Agriculture-based Sustainable Intensification (CASI) and efficient water management as foundations for increasing crop productivity and resilience. Technological changes are being complemented by research into institutional innovations that strengthen adaptive capacity and link farmers to markets and support services, enabling both women and men farmers to adapt and thrive in the face of climate and economic change.

In its current phase, the project team is identifying and closing capacity gaps so that stakeholders can scale CASI practices beyond the project lifespan. Priorities include crop diversification and rotation, reduced tillage using machinery, efficient water management practices, and integrated weed management practices. Women farmers are specifically targeted in the scaling project: it is intended that a third of participants will be women and that at least 25% of the households involved will be led by women.

The 9.7 million Australian dollar (US$7.2 million) SRFSI project is a collaboration between CIMMYT and the project funder, the Australian Centre for International Agricultural Research. More than 20 partner organizations include the Departments of Agriculture in the focus countries, the Bangladesh Agricultural Research Institute, the Indian Council for Agricultural Research, the Nepal Agricultural Research CouncilUttar Banga Krishi VishwavidyalayaBihar Agricultural UniversityEcoDev SolutionsiDEAgrevolutionRangpur-Dinajpur Rural ServicesJEEViKASakhi BiharDreamWork SolutionsCSIRO and the Universities of Queensland and Western Australia.

OBJECTIVES

  • Understand farmer circumstances with respect to cropping systems, natural and economic resources base, livelihood strategies, and capacity to bear risk and undertake technological innovation
  • Develop with farmers more productive and sustainable technologies that are resilient to climate risks and profitable for smallholders
  • Catalyze, support and evaluate institutional and policy changes that establish an enabling environment for the adoption of high-impact technologies
  • Facilitate widespread adoption of sustainable, resilient and more profitable farming systems

 

Zero-tillage service provision is key to facilitating adoption.
Zero-tillage service provision is key to facilitating adoption.
Service provider Azgad Ali and farmer Samaru Das have a fruitful relationship based on technology promoted through CIMMYT's SRSFI project.
Service provider Azgad Ali and farmer Samaru Das have a fruitful relationship based on technology promoted through CIMMYT’s SRSFI project.
A zero-tillage multi-crop planter at work in West Bengal.
Bablu Modak demonstrates his unpuddled mechanically transplanted rice.
Bablu Modak demonstrates his unpuddled mechanically transplanted rice.
CIMMYT's SRFSI team and the community walk through the fields during a field visit in Cooch Behar.
CIMMYT’s SRFSI team and the community walk through the fields during a field visit in Cooch Behar.

Delivering Genetic Gain in Wheat (DGGW)

Climate-change-induced heat stress and disease pathogens migrating across borders threaten the world’s wheat supply and food security in Africa and the Middle East. Building on the Durable Rust Resistance in Wheat (DRRW) global partnership, Delivering Genetic Gain in Wheat (DGGW) will mitigate serious threats to wheat brought about by climate change and develop and deploy new strains of wheat that are heat tolerant as well as resistant to wheat rusts and other diseases.

Cornell University has been awarded a $24 million grant by the Bill & Melinda Gates Foundation to continue to fund and expand the work of the Borlaug Global Rust Initiative (BGRI).

DGGW uses modern tools of comparative genomics and big data to develop and deploy varieties of wheat that incorporate climate resiliency as well as improved disease resistance for smallholder farmers in these politically vulnerable regions.”

The four-year grant builds on the successes of the BGRI, led by the DRRW project, funded by the UK Department for International Development and the Bill & Melinda Gates Foundation from 2008 to 2016.

Deadly wheat pathogens have been moving from the wheat fields of northern and East Africa into the Middle East. In their rush to identify genes that can resist evolving and virulent new strains of the disease known as stem rust, BGRI scientists have developed collaborative arrangements and facilities, with the crucial support of national governments and agencies, to screen thousands of samples of wheat each year from every continent under rust infection, to identify resistant lines.

DGGW is based at Cornell University and acts as the secretariat for the BGRI. Collaborations continue with national partners in Kenya and Ethiopia, as well as scientists at international agricultural research centers that focus on wheat, including CIMMYT and the International Center for Agricultural Research in the Dry Areas.

Advanced research laboratories in the U.S., Canada, China, Turkey, Denmark, Australia and South Africa collaborate on the project. So far, more than 2,000 scientists from 35 international institutions spread across 23 countries are involved in the consortium, and 37 countries contribute data to the surveillance network.

Objectives

  • Mitigate serious threats to wheat brought about by climate change
  • Develop new strains of heat-tolerant wheat
  • Develop rust and disease resistant wheat
  • Monitor spread of stem rust and other windborne wheat diseases

Seeds of Discovery (SeeD)

Seeds of Discovery (SeeD) studies and characterizes maize and wheat genetic diversity for use in breeding programs, which develop wheat varieties and maize hybrids improved through conventional technologies. These hybrids are better adapted to climate change, more resistant to pests and diseases and have higher yield potential.

In 2015, SeeD’s main results were:

  • SeeD began a comprehensive study of maize genetic diversity by obtaining, processing and analyzing the world’s largest genotypic data set to help scientists identify new genes of interest for maize breeding programs.
  • More than 2 billion genotypic data and more than 870,000 phenotypic data of maize field trails have been processed and uploaded to SeeD’s database and repository making them available to the scientific community via the project website.
  • A high level of Tar Spot resistance was confirmed in maize landraces native to the state of Oaxaca in Mexico and Guatemala, which will be used to breed new resistant maize lines.

To order seeds from CIMMYT, please click here.

OBJECTIVES

  • To explore in depth the original genetic composition of maize and wheat through the analysis of hundreds of thousands of seeds stored in gene banks in Mexico.
  • To make available to the national and international scientific community information on key agronomic characteristics such as tolerance to heat and drought, or resistance to important pests.
  • To offer a genetic analysis service that taps on the best features of maize and wheat through conventional improvement programs for both grains.
  • To contribute to long term food security in Mexico and the rest of the world, despite the impact of climate change and the scarcity of natural resources such as water, nutrients and oil.

Breaking Ground: Tawanda Mashonganyika unites crop breeders and market experts for more impactful varieties

Tawanda Mashonganyika

The low rate at which farmers adopt improved varieties is one of the biggest obstacles to overcoming food insecurity. The average maize variety grown by farmers in sub-Saharan Africa is 15 years old, even though maize breeders have been releasing more than 50 new varieties every year.

When it comes to climate change, for example, thanks to a plentiful arsenal of genetic diversity crop breeders are developing varieties adapted to increased heat and drought, but farmers continue to grow crops developed for the climate of yesterday.

One part of the answer is that it is not enough merely to create a variety resistant to heat, drought or flooding; complex dynamics are at play in crop markets and in farmers’ fields that must be reflected in the design of new varieties.

This where product manager Tawanda Mashonganyika comes in, working for the CGIAR Excellence in Breeding Platform (EiB) out of CIMMYT-Kenya, and one of the first to occupy such a role in the CGIAR system.

“This position is supposed to bring in a business kind of thinking in the way products and varieties are developed,” said Mashonganyika, who studied agricultural economics, agribusiness and value chains at the universities of Reading, U.K. and Queensland, Australia, and has professional experience with crops grown in Africa.

“You need to know who you are developing varieties for, who are your customers and clients, and you also need to design products so that they can have success on the market.”

Mashonganyika’s role is to support CGIAR and national agricultural research system (NARS) breeders to design new varieties focused on replacing older products in a specific market, as opposed to only breeding for an agro-ecological zone. Key to this approach is the involvement of experts from other disciplines such as gender, socioeconomics and nutrition, as well as people involved in the value chain itself, such as food processors, seed producers and farmers.

The outcome of this collaboration is a product profile: a written description of a new product with all the traits needed to replace the variety that currently dominates the target market. The profile serves as a common goal for CGIAR and NARS collaboration, and as a tool to communicate with donors. With the breeding program accountable for delivering a pipeline of new products designed for impact, they can ensure that these varieties also deliver traits such as biofortification to farmer’s fields.

Instead of breeding for all the traits that may be desirable in a new variety, what sets the product profile approach apart is that breeding programs can then focus resources on the traits that will have the greatest impact in the market, and therefore the field. This market-focused approach also enables better collaboration between breeders and experts from other disciplines:

“When you bring a cross-functional team together, you really need to give them an understanding of the desired goal of what we want to design and eventually put onto the market,” said Mashonganyika. “We put an emphasis on data-driven decisions, so it is not just a meeting of experts with different opinions; we always try to create a platform to say ‘we need to follow what the market is saying.’”

“[Non-breeding experts] are usually very excited to talk about the data that they have about markets, and the knowledge that they have about how gender or nutrition affects products on the market,” said Mashonganyika. “There are so many women farmers, especially in Africa, so when you begin to incorporate gender, we are increasing the scope of impact.”

Although actors such as seed producers or food processors may have no breeding expertise, Mashonganyika views their input as essential: “They are the ones that are at the mouthpiece of the market, they eventually take up the varieties and they multiply the seed, so they have very good information.”

One example is a collaboration with the National Agricultural Research Organization (NARO), Uganda, where representatives from private sector seed companies are being included to help breeders better understand their customers. “They give information about seed multiplication processes, and what makes a variety be considered for multiplication in seed systems.”

EiB has created a standardized tool to create product profiles, and 200 were submitted to the growing database in the first three months of the pilot period alone, including profiles submitted by 10 national agricultural research programs in Africa and Asia.

In addition to promoting the use of product profiles, a product manager is also involved ensuring communication and accountability throughout the development of new products.

“With product profiles we say a breeder should be accountable for delivering each product in a certain timeframe,” said Tawanda. “We always emphasize that a breeding program should have an annual product review process, because markets are dynamic, they are bound to change. This is a good habit to ensure that your products remain relevant and designed for impact.”

Although Mashonganyika is one of the first CGIAR product managers, a desire to see greater impact in the field is turning others in the same direction.

“I hope that in the near future we will see other CGIAR centers developing similar positions,” said Mashonganyika.

Improved Maize for Tropical Asia (IMTA)

The Improved Maize for Tropical Asia (IMTA) is employing modern maize breeding techniques to develop and deploy new, climate-resilient maize hybrids, including traits important for identified niche markets across tropical Asia.

Principal Coordinator: B.S. Vivek

Heat Stress Tolerant Maize for Asia (HTMA)

The Heat Stress Tolerant Maize (HTMA) for Asia project is a public-private alliance that targets resource-poor people and smallholder farmers in South Asia who face weather extremes and climate-change effects. HTMA aims to create stable income and food security for resource-poor maize farmers in South Asia through development and deployment of heat-resilient maize hybrids.

South Asian farmlands have been increasingly experiencing climate change-related weather extremes. If current trends persist until 2050, major crop yields and the food production capacity of South Asia will decrease significantly – by 17 percent for maize – due to climate change-induced heat and water stress.

In response, CIMMYT and partners are developing heat stress-resilient maize for Asia. The project leverages the germplasm base and technical expertise of CIMMYT in breeding for abiotic stress tolerance, coupled with the research capacity and expertise of partners.

OBJECTIVES

  • Future climate data obtained from the recent CIMP5 database, and future and current heat stress hot-spots in South Asia are mapped
  • Genome-wide association studies revealed multiple haplotypes significantly associated heat tolerance, including nine significant haplotype blocks (~200 kb) for grain yield explaining 4 to 12% phenotypic variation individually with the effect size varied up to 440 kg/ha.
  • A total of 17 first generation heat tolerant hybrids formally licenced to project partners for deployment and scale-out in their targeted geographies/market in stress-prone ecologies of South Asia
  • New base germplasm, including early generation lines and pedigree populations, with enhanced levels of heat tolerance shared with partners to use in their own breeding programs.
  • Over 130 maize researchers and technical staff from India, Nepal, Pakistan and Bangladesh, including 32 women and 99 men, were trained on various aspects of developing stress-resilient maize through four training course workshops organized under the project.
  • Strong phenotyping network for heat stress in South Asia, with well-equipped locations and trained representatives.

FUNDING INSTITUTIONS

  • United States Agency for International Development – Feed the Future

PRINCIPAL COORDINATOR

Pervez Haider Zaidi

 

Climate Resilient Maize for Asia (CRMA)

Climate Resilient Maize for Asia is supported by Germany’s development agency GIZ, and implemented as a public-private partnership, which targets enhanced resilience among resource-poor, maize-based farming families in South and Southeast Asia by providing them with abiotic stress-tolerant maize hybrids adapted to rain-fed stress-prone production systems for crop diversification, intensification and higher yields.

Most of the maize in Asia is grown as a rain-fed crop, which is prone to vagaries of seasonal monsoon rains. This is clearly reflected in the productivity of maize under rain-fed systems — usually less than half of the irrigated system. The erratic distribution pattern of monsoon rains results in drought or water logging at different crop growth stages, which is the main factor responsible for relatively low productivity of rain-fed maize. Due to the possibility of uncertain economic returns, farmers often hesitate to invest in improved seed, fertilizers and inputs, which further add to poor yields of rain-fed maize. Climate change effects are further threatening an already challenging maize mega-environment in the Asian tropics, which are identified as subject to climate change effects, with high vulnerability and low adoption capacity.

The project deals with high priorities of Asian stakeholders related to improving maize production in the face of current and anticipated effects of climate change and access to diverse and valuable maize germplasm, building upon the GIZ-funded project known as Abiotic stress tolerant maize for increasing income and food security among the poor in South and Southeast Asia,” where significant progress is being made towards understanding the rain-fed stress-prone agro-ecologies in South and Southeast Asia, development of improved maize germplasm with enhanced levels of tolerance to drought, waterlogging or combined stress tolerance.

OBJECTIVES

  • Using data on elevation, aridity index and mean annual rainfall, a climate similarity map with a total 30 zones was developed for South Asia. This is useful in planning regional hybrid trials respective environment analogue.
  • New hybrid combinations by crossing promising stress-tolerant lines and evaluated across moisture regimes, including managed drought and waterlogging stresses, and optimal conditions, and a set of 50 promising hybrids are ready for large-scale adaptive trials.
  • Among the inbred lines developed under the project, four most promising lines were globally released CML (CIMMYT Maize Lines), namely CML-562, CML-563, CML-564 and CML-565, for use in low-land tropical breeding programs targeting stress-prone rainfed environment.
  • Total 18 Quantitative Trait Locus (QTLs) for grain yield under waterlogging and 21 QTLs for grain yield and anthesis-siling interval under drought were identified using genome-wide association studies and analyses of bi-parental populations. These validated genomic regions are candidate for introgression into elite Asia-adapted genetic background.
  • Breeder ready marker assays (KASP assays) have been developed for the 18 significant genomic regions that typically explained more than 10 percent of phenotypic variance under water-logging stress.
  • Protocol for rapid-cycle genomic selection (RC-GS) optimized with regards to constitution of suitable target population, and suitable statistical model for genomic selection.
  • Genetically enhanced cycle (C2) of two multi-parent synthetic populations were developed by inter-mating top 5 percent progenies with high genotypically estimated breeding values (GEBVs) were submitted for subjecting to double haploid for deriving new generation of stress-resilient maize lines

FUNDING INSTITUTIONS

  • Germany’s development agency GIZ

PRINCIPAL COORDINATOR

Pervez Haider Zaidi

Buena Milpa

The Buena Milpa project in Guatemala, conducted in collaboration with the country’s Agricultural Science and Technology Institute (ICTA), is aimed at implementing a sustainable intensification strategy for agriculture while reducing poverty, malnutrition and environmental damage.

The project, managed in collaboration with the U.S. Agency for International Development’s Feed the Future program, is based in the highlands of Guatemala, a region recognized for its diversity of maize varieties, flora and fauna. Farmers grow a wide variety of crops, including beans, legumes, pumpkin, fruit trees and native plants.

Through Buena Milpa, CIMMYT’s Sustainable Intensification Strategy for Latin America, with its focus on biodiversity conservation, participative breeding, soil conservation, farm diversification and maize, helps to conserve maize landraces and other important plants in the region.

Guatemala, where maize is a key food staple, is known for its wide maize biodiversity. The maize fields of most highland farmers are part of farm systems which includes animal husbandry (chickens, sheep or cattle). These complex farm systems diversify diets diet and sources of family income.

A range of soil conservation methods popular with farmers help preserve biodiversity. A variety of grasses, trees and other plants are used to ensure soil and field conservation.

Most of the maize in the region is grown on steep hillsides. Farmers have very little land and use as much of it as possible for crop production. Water and soil conservation practices aim to reduce the propensity to landslides, decrease erosion through soil cover, minimize the effects of erosion and help to settle the materials and soils mobilized through erosion.

The Buena Milpa project improves native maize landraces, increases productivity, improves plant architecture, grain and seed quality, thereby mitigating losses due to the effects of climate change and decreasing maize reserves, especially during periods of seasonal hunger.

Most farmers involved in the project belong to a Mayan ethnic group that has historically been marginalized and excluded from development processes. A social inclusion strategy fosters the participation of indigenous people, women, children, the young and the elderly in order to benefit everyone involved in maize production systems.

Links with other actors foster activities to generate information that raises awareness about how people are socially excluded, to inform and sensitize local actors about social dynamics that limit inclusion.

OBJECTIVES

  • Natural resource conservation
  • Soil and water conservation strategies to reduce erosion and maintain soil water
  • Understand maize diversity in the highlands of Guatemala
  • System diversification, taking into account different types of farms in the region
  • Design social inclusion strategy
  • Set up community seed banks to be the base of biodiversity conservation and participative breeding efforts
  • Foster innovation and reduce food insecurity and malnutrition
  • Increase sustainability of maize-based systems in the highlands
  • Empower farmers and train strategic actors by linking research to farmers’ needs and facilitating information exchange

Drought Tolerant Maize for Africa (DTMA)

The Drought Tolerant Maize for Africa project aims to mitigate drought and other constraints to maize production in sub-Saharan Africa, increasing maize yields by at least one ton per hectare under moderate drought and with a 20 to 30 percent increase over farmers’ current yields, benefiting up to 40 million people in 13 African countries. The project brings together farmers, research institutions, extension specialists, seed producers, farmer community organizations and non-governmental organizations. It is jointly implemented by CIMMYT and the International Institute for Tropical Agriculture, in close collaboration with national agricultural research systems in participating nations. Millions of farmers in the region are already benefiting from the outputs of this partnership, which includes support and training for African seed producers and promoting vibrant, competitive seed markets.

Achievements:

  • Between 2007 and 12, participants marketed or otherwise made available 60 drought tolerant hybrids and 57 open-pollinated varieties to smallholder farmers
  • In addition to drought tolerance, the new varieties and hybrids also possess such desirable traits as resistance to major diseases
  • Engage government officials in policy dialogue to help fast-track varietal releases and fosters competitive seed markets and more
    widespread access to quality seed at affordable prices
  • Help ensure farmers’ access to the best possible products and services, coordinate various capacity-building events and
    activities for maize breeders, technicians, seed producers, extension workers, non-government organizations and farmer groups
  • Provide technical and advisory support to 50 African undergraduate and 28 African graduate students
  • Expand smallholder farmers’ use of drought and other stress tolerant maize seed to benefit 30 to 40 million people and provide added grain worth $160-200 million each year in drought-affected areas of sub-Saharan Africa

Principal coordinator

Tsedeke Abate

Innovative irrigation promises “more crop per drop” for India’s water-stressed cereals

A pioneering study demonstrates how rice and wheat can be grown using 40 percent less water, through an innovative combination of existing irrigation and cropping techniques. (Photo: Naveen Gupta/CIMMYT)
A pioneering study demonstrates how rice and wheat can be grown using 40 percent less water, through an innovative combination of existing irrigation and cropping techniques. (Photo: Naveen Gupta/CIMMYT)

On World Water day, researchers show how India’s farmers can beat water shortages and grow rice and wheat with 40 percent less water

India’s northwest region is the most important production area for two staple cereals: rice and wheat. But a growing population and demand for food, inefficient flood-based irrigation, and climate change are putting enormous stress on the region’s groundwater supplies. Science has now confronted this challenge: a “breakthrough” study demonstrates how rice and wheat can be grown using 40 percent less water, through an innovative combination of existing irrigation and cropping techniques. The study’s authors, from the International Maize and Wheat Improvement Center (CIMMYT), the Borlaug Institute for South Asia (BISA), Punjab Agricultural University and Thapar University, claim farmers can grow similar or better yields than conventional growing methods, and still make a profit.

The researchers tested a range of existing solutions to determine the optimal mix of approaches that will help farmers save water and money. They found that rice and wheat grown using a “sub-surface drip fertigation system” combined with conservation agriculture approaches used at least 40 percent less water and needed 20 percent less Nitrogen-based fertilizer, for the same amount of yields under flood irrigation, and still be cost-effective for farmers. Sub-surface drip fertigation systems involve belowground pipes that deliver precise doses of water and fertilizer directly to the plant’s root zone, avoiding evaporation from the soil. The proposed system can work for both rice and wheat crops without the need to adjust pipes between rotations, saving money and labor. But a transition to more efficient approaches will require new policies and incentives, say the authors.

During the study, researchers used a sub-surface drip fertigation system, combined with conservation agriculture approaches, on wheat fields. (Photo: Naveen Gupta/CIMMYT)
During the study, researchers used a sub-surface drip fertigation system, combined with conservation agriculture approaches, on wheat fields. (Photo: Naveen Gupta/CIMMYT)

Read the full story:

Innovative irrigation system could future-proof India’s major cereals. Thomsom Reuters Foundation News, 20 March 2019.

Read the study:

Sidhu HS, Jat ML, Singh Y, Sidhu RK, Gupta N, Singh P, Singh P, Jat HS, Gerard B. 2019. Sub-surface drip fertigation with conservation agriculture in a rice-wheat system: A breakthrough for addressing water and nitrogen use efficiency. Agricultural Water Management. 216:1 (273-283). https://doi.org/10.1016/j.agwat.2019.02.019

The study received funding from the CGIAR Research Program on Wheat (WHEAT), the Indian Council of Agricultural Research (ICAR) and the Government of Punjab. The authors acknowledge the contributions of the field staff at BISA and CIMMYT based at Ludhiana, Punjab state.