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Author: Celine Lim

The potential of conservation agriculture in increasing yield and tackling climate change

Written by Celine Lim on . Posted in Publications.

A multitude of research on the benefits of conservation agriculture in South Asia has predominantly focused on favorable environments where farmers have reliable access to energy supporting irrigation and inputs.

In this new publication, scientists from the International Maize and Wheat Improvement Center (CIMMYT) explore the performance of conservation agriculture in under-developed coastal environments in southern coastal Bangladesh over a period of three consecutive years, including under rainfed conditions and/or with limited application of irrigation.

Farmers calibrate their machines for strip tillage in communities participating in experiments. (Credit: Ranik Martin)

Responding to the identified research gap, this research tests the hypothesis that seasonally alternating tillage (SAT) practices that alternate between strip-tillage in the winter season for maize and conventional tillage (CT) prior to rice can reduce energy use, increase energy productivity, and reduce yield-scaled emissions while increasing or maintaining yield and profit, even under these challenging conditions.

Working with 35 farmers who managed experiments in partially irrigated and rainfed environments in southern coastal Bangladesh, researchers teamed up with farming communities to compare the full suite of conservation agriculture to SAT practices against CT and farmer’s own practices.

The research found that in these coastal environments, both conservation agriculture and SAT practices have the potential to increase cereal yields and energy productivity while reducing yield-scaled emissions, thereby enabling farmers even in challenging coastal environments to produce more while reducing energy use and mitigating greenhouse gas emissions.

However, in consideration of farmers’ aversion to the elimination of tillage in rice, the research suggests that adaptations in CA practices and seasonal tillage prior to rice may be a more practical fit for rice-maize systems managed by smallholders reluctant to eliminate tillage for rice in coastal Bangladesh.

This research gives implications for future research and development efforts to take into consideration farmers’ preferences or the trade-offs resulting from significant change to conservation agriculture management in otherwise fully tilled systems. It is also vital to integrate development efforts that focus not only on agronomic management, but also on building supportive value chains to improve availability and affordability of the inputs and farm machinery required to successfully establish crops with such practices.

Read the full study: Adapted Conservation Agriculture Practices Can Increase Energy Productivity and Lower Yield-Scaled Greenhouse Gas Emissions in Coastal Bangladesh

Cover photo: Long-term conservation agriculture in Rajshahi, Bangladesh. (Credit: CIMMYT/Sam Storr)

Farmers’ views on app usage for information sharing

Written by Celine Lim on . Posted in Publications.

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.

Read the study here: How to Make a Smartphone-Based App for Agricultural Advice Attractive: Insights from a Choice Experiment in Mexico

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)

Achieving sixty years of wheat yield increase

Written by Celine Lim on . Posted in Publications.

Achieving greater food security requires a continued increase in global wheat yields, which the developing world plays a central role in meeting. Newly published research covering 60 years of wheat yield trends in the Yaqui Valley, Mexico, provides insights into how farmers can increase yields to address this need.

By dividing the 60-year interval into three 20-year periods between 1960-2019 and correcting farm yield for the strong influence of inter-annual variation in January to March minimum temperature, scientists from Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the International Maize and Wheat Improvement Center (CIMMYT) have taken steps towards advancing the sustainability of the Valley’s wheat cropping system by studying farm yield for the irrigated spring wheat production environment.

Total yield increase, corrected for temperature and CO2 rise, relative to average yield in each period, was 4.17%, 0.47%, and 1.59% p.a. for 1960–79, 1980–99, and 2000–19, respectively. The breeding component, estimated by the increase in the Varietal Yield Index in farmers’ fields, rose at 0.97%, 0.49%, and 0.71% p.a., respectively. The remaining yield change (3.16, -0.02%, and 0.87% p.a., respectively) comprised the net effect of improved crop management (agronomic progress), plus that of off-farm changes.

In the first period, off-farm developments were bolstered by strong government financial support whereas developments in the second period were hindered by the breakdown of the traditional smallholder land system and withdrawal of government support. The final period experienced better prices and improved access to technical advice.

Wheat is likely to continue playing a dominant role in the Yaqui Valley for the next 20-year period, especially from potential yield increase through breeding. However, closing the yield gap is becoming more challenging due to fluctuations in energy price, goals to achieve net zero CO2 and environmental signals. The biophysical sustainability of the Valley’s wheat cropping system requires urgent actions through better fertilizer management, greater cropping diversity, integrated management of biotic threats, acceptance of no-till, residue retention and controlled traffic.

Lessons from the Yaqui Valley bear importance for global wheat security given that without area increase and new technologies, food security will increasingly depend on developing countries.

Read the full publication here: Sixty years of irrigated wheat yield increase in the Yaqui Valley of Mexico: Past drivers, prospects and sustainability

Cover photo: Workers sowing wheat into sorghum residue. (Credit: CIMMYT)

Morris dedicated her life and career to understanding and developing wheat genes.

Celebrating the life of Rosalind Morris, trailblazer for women in agriculture

Written by Celine Lim on . Posted in News.

A recent portrait of Rosalind Morris. (Photo: Courtesy)
A recent portrait of Rosalind Morris. (Photo: Courtesy)

Rosalind Morris, a celebrated wheat cytogeneticist and professor, peacefully passed away on March 26, 2022, just a few weeks shy of her 102nd birthday. Morris fought a long battle with cancer in her 90s and, most recently, an infection of COVID-19, which proved fatal to her health.

According to her wishes, there was no funeral or memorial service. Morris’s body was cremated, and her ashes deposited in her family’s plot in Ontario, Canada.

Born in Ruthin, United Kingdom, in 1920 to schoolteacher parents, Morris pursued studies in agricultural sciences at the University of Guelph and earned a bachelor’s degree in horticulture. Morris would later earn a Ph.D. from Cornell University’s department of plant breeding, becoming one of the first two women to accomplish this feat, along with Leona Schnell.

Morris dedicated her life and career to understanding and developing wheat genes.
Morris dedicated her life and career to understanding and developing wheat genes.

A pioneer in agricultural science and one of the first women scientists of her time, Morris dedicated her life and career to understanding and developing wheat genes. Her contributions include the development of wheat genetic stocks, or wheat populations generated for genetic studies, with far-reaching impact globally in explaining wheat genetics. The work of Morris provided a premier resource base for the emerging field of functional genomics, which explores how DNA is translated into complex information in a cell.

During World War II, Morris’s deep concern over the effects of atomic bombs dropped on Hiroshima and Nagasaki led her to study and experiment with the effects of X-rays and thermal neutrons on crop plants. In 1979, Morris became the first woman honored as a fellow of the American Society of Agronomy.

While being an acclaimed scientist internationally, Morris was also known for her passion for teaching. In the same year Morris earned her doctoral degree from Cornell University, she was hired as the first female faculty member in the agronomy department at the University of Nebraska-Lincoln (UNL) in 1947. This career would last 43 years: first as an assistant professor in 1947, becoming a professor in 1958 and remaining in that role until 1990, when she gained the title of emeritus professor of plant cytogenetics.

Morris was a trailblazer for women in agronomy during a point in history when few women were given the opportunity to pursue a career in the sciences. Morris is remembered by her peers not only for her lifelong contribution to agricultural sciences but also her immense kindness and patience.