Written by Bea Ciordia on . Posted in Uncategorized.
Gustavo Teixeira is an Automation and Mechanization Lead with CIMMYT’s Excellence in Breeding Platform.
As a Breeding Operations and Phenotyping module leader, he provides evaluation of breeding program operations according to continuous improvement and operational excellence methodologies and lead initiatives to improve CGIAR and National Agricultural Research Systems (NARS) breeding operations capacities.
Teixeira is an expert in agriculture engineering, processes, mechanization and automatization. He has over 15 years of experience in the private sector, including as Automation Manager for R&D in Latin America at Syngenta.
Gerald Blasch is a Crop Disease Geo-Spatial Data Scientist whose work focuses on research for development (R4D) of remote sensing and geospatial solutions for crop disease early warning systems. He holds a PhD in Agricultural Remote Sensing from Technical University Berlin, Germany, and an MSc in Physical Geography from University Regensburg, Germany.
Blasch has 13 years of research and consultancy experience on both international and national projects in the agriculture and development sectors of several countries (e.g. Australia, China, Germany, Mexico, and the UK). As researcher, he developed remote sensing and GIS tools for precision and conservation agriculture, digital soil mapping, and environmental monitoring during his Post-Doc (Newcastle University, UK) and PhD studies (GFZ Potsdam, Germany), and consultancy activities (CIMMYT, Mexico). As a GIS expert (GIZ, Germany; SEMARNAT, Mexico) he built and managed a GIS for waste management, including capacity building and knowledge transfer.
Walter Chivasa is CIMMYT’s maize seed systems coordinator for Africa. He is responsible for co-developing and executing CIMMYT’s maize seed scaling strategies, managing and developing strategic partnerships, and implementing activities to promote the effectiveness and impacts of CIMMYT products in sub-Saharan Africa. This entails driving and documenting the impact of CIMMYT-derived varieties, contributing to the sustainability, profitability, and growth of seed company partners, and ultimately bringing the benefits of improved and affordable maize seed to smallholder farmers, who face wide-ranging constraints in sub-Saharan Africa.
Chivasa supervises scientists working to improve maize seed systems efficiency through the generation of seed production data, assisting partners in the design and implementation of seed road maps, including inbred line maintenance, production of early generation seed of CIMMYT-derived varieties, and extensive on-farm testing through a network of partners in order to accelerate the deployment of improved varieties.
Kindie Tesfaye is a Senior Scientist based in Ethiopia. He has more than 15 years of experience in executing and managing climate, crop modeling and GIS related projects for agricultural research and development in developing countries.
During his time at CIMMYT, he has developed a system of data acquisition and quality control for climate, crop modeling and geospatial analysis. He has applied systems analysis, cropping systems modeling and geospatial analysis tools for yield gap analysis, targeting of climate smart technologies and climate change studies across different scales. In collaboration with partners, he has also developed a digital agro-climate advisory system that provides decision support to smallholder farmers.
Researchers visit maize fields in Ethiopia’s Wondo Genet Agricultural Research Center. (Photo: Peter Lowe/CIMMYT)
One major reason why maize productivity in sub-Saharan Africa is very low is poor soil health. Soil acidity is often mentioned because of its impact on crop yields and the extent of acid soils in the region. A recent soil mapping exercise, conducted by the Ethiopian Soil Information System (EthioSIS) under the administration of the Ethiopian Agricultural Transformation Agency (ATA), estimated that 43% of arable lands were affected by acid soils and that 3.6 million people, about 10% of the total rural population, live in areas with acidic soils.
Very acid soils — those with a pH below 5.5, roughly one hundred times more acidic than neutral soils — are associated with certain toxicities, like aluminum and iron excess, and some nutrient deficiencies. Soil acidity pushes soil nutrients out of reach of the plant, leading to stunting of root system and plant. As a result, the plant becomes also less tolerant to drought.
Soil acidification depends on soil nature, agroecology and farming systems. It happens through natural leaching of CO2 after rainfall and excess application of nitrogenous fertilizer or organic matter, for instance.
As a result, soil acidity significantly affects maize yields. In Ethiopia, studies have revealed substantial impacts on crop productivity related to acid soils and the importance of acid soil management for Ethiopia’s food security. The Ethiopian Institute of Agricultural Research (EIAR) estimated that soil acidity on wheat production alone costed the country over 9 billion Ethiopian Birr, about $300 million per year.
Acidic soils in the limelight
Preliminary analysis led by the International Food Policy Research Institute (IFPRI) suggests that yields of major cereal crops, such as wheat and barley, could increase by 20 to 40% with the application of lime in acidic areas of the country.
While these preliminary results are significant, we need to know more about local farmers’ experience with acidic soil and their mitigation strategies. Such impact assessments are however typically determined at either the national or experimental plot level and do not map where mitigating against acid soils would be the most profitable.
To improve acid soils, farmers may apply lime on their fields to raise the pH, a practice known as liming. How much lime to apply will depend on the crop, soil type but also on the quality of lime available. Liming has multiple beneficial effects like improving nitrogen fixation of legume nodules, boosting yields of legume crops.
But liming has a cost. It can quickly become a very bulky affair as we need to apply 3 to 4 tons per hectare for sandy soils and up to 8 tons per hectare for clay and humifere soils.
Furthermore, existing lime markets are quite limited or even non-existent in many areas, even those where acidic soils are prevalent. Developing supply chains from scratch is difficult and costly. Understanding the costs and potential returns to such investments is important. There are many questions to ask at different levels, from the farm and farming system to the lime supply chain. What are the available lime sources — calcitic, dolomite or blend — and lime quality? Where are the lime processing units and how could you assess the transport cost to the farms? What could be the crop yield response depending on the lime application?
User-friendly and scalable dashboard
IFPRI, in collaboration with EIAR, the International Maize and Wheat Improvement Center (CIMMYT) and the German aid agency GIZ, developed a pilot in Ethiopia’s Amhara region to help better target lime interventions for a greater impact. Amhara region was chosen because of the importance of acid soils, and access to extensive soil data.
Combination of several spatial datasets on soil quality, agroecological, weather, long-term agronomic trials and crop modelling tools enabled to generate at scale, georeferenced estimates of crop yield responses for different lime applications. Calibration of this spatial model for wheat estimated a yield increase of approximately 30% increasing the pH from 5.5 to 6.5, which is relatively consistent with general research data and expert opinion.
Mapped estimates of the grain prices and the delivered costs of lime, based on the location of the lime crushers in the region and transport costs, enables then to map out the spatial profitability of lime operations.
Initial calculations revealed a great variability of lime costs at the farmgate, with transportation representing at least half of total lime costs. It showed also that farmers often do not use the most cost-effective combination of inputs to tackle soil acidity.
Another possible application is to determine maize growing areas where lime benefits outweigh the costs, which would be ideal sites for demonstrating to farmers the positive impact lime applications could have to their livelihoods.
This Amhara lime dashboard prototype demonstrated its scalability. A national dashboard is currently being developed, which includes lime sources GPS location, grain prices and district-level soil quality mapping. This approach is tested also in Tanzania.
CIMMYT and its partners plan to package such tool in a user-friendly open-access web version that can be rapidly updated and customized depending on the area of intervention, for instance integrating a new lime source, and applied for different crops, and across the Eastern African region. Such dashboards will help development organizations and government make better informed decisions regarding lime investments.
Francisco Pinto is a remote sensing specialist with a background in agronomy and plant physiology. He is in charge of the high-throughput phenotyping platforms in the Global Wheat Program.
Pinto’s research focuses on the use remote sensing and image processing techniques for field phenotyping of wheat, aiming at improving genetic gains in yield and quantifying physiological traits. He is also interested in using remote sensing for understanding ecophysiological dynamics of crops at different spatio-temporal scales.
L.M. Suresh leads CIMMYT’s maize pathology efforts in sub-Saharan Africa. He regularly contributes to Global Maize Program projects that have strategic significance in maize pathology, disease diagnosis, epidemiology and disease resistance.
Suresh also works on maize lethal necrosis (MLN) phenotyping with public and private partnership at CIMMYT and the Kenya Agricultural and Livestock Research Organization’s (KALRO) joint research station in Naivasha, Kenya. His team has phenotyped around 200,000 maize germplasm from various partners and 19 MLN resistant/tolerant hybrids have been released in east Africa so far. He has supported the training of more than 5000 researchers, students, extension workers, private seed company executives and farmers in rapid disease diagnosis and his contributions have helped to prevent further MLN spread throughout eastern and southern Africa.
Jelle Van Loon is an agricultural engineer with a PhD in biosystems modelling, and over a decade of experience in agricultural research for development in Latin America. He currently serves as Associate Director for Latin America of CIMMYT’s Sustainable Agrifood System Program, leading research initiatives aimed at building pathways towards resilient food systems and long-term rural development. Leading the innovations for development team, he coordinates a transdisciplinary team, including aspects like farmers market linkages and responsible sourcing, capacity development, and community-based outreach and explores the multiple interfaces between adaption, adoption and scaling from a socio-technical viewpoint in research for agricultural development.
In addition, Jelle has ample expertise in scale-appropriate mechanization from smallholder farm solutions to precision agriculture applications, has actively progressed to work in innovation systems thinking, and in addition he serves CIMMYT as representative for Latin America in which he focusses this line of work to establish impactful partnerships and innovative business models.
Tek Sapkota currently leads the Climate Change Science Group within CIMMYT’s Sustainable Agrifood Systems (SAS) program and is based in CIMMYT headquarters in Mexico. He carries out research in the area of agricultural systems, soil science and environmental sciences. He is particularly involved in studying agro-ecosystems management consequences on nutrient dynamics and their effect on food security, climate change adaptation and mitigation. He is a member of the Climate Investment Committee in OneCGIAR.
Sapkota has served in IPCC as Lead author as well as Review editor. He is an associate Editor of Nature Scientific Report and Frontiers in Sustainable Food Systems journals. He is an agricultural expert in the India GHG platform.
A farmer uses a tractor-operated precision maize planter. (Photo: Kashif Syed/CIMMYT)
In the northwestern province of Pakistan, near the Afghan border, the International Maize and Wheat Improvement Center (CIMMYT) is helping connect farmers with precision planters to support higher maize yields and incomes. Maize is one of the most important cereals in Pakistan, but in the province of Khyber Pakhtunkhwa yields are significantly lower than the national average. The majority of maize farmers in this province have less than five acres of land and limited access to resources, including high-quality maize seed and mechanization.
Under the Agricultural Innovation Program (AIP) for Pakistan, CIMMYT introduced push row planters in 2016 to help farmers to get a uniform crop stand and save labor costs and time as compared to traditional planting practices. CIMMYT has since then partnered with Greenland Engineering to import tractor-operated precision maize planters. These precision planters allow farmers to plant two rows of maize in one pass and evenly distribute both seeds and fertilizer.
“Optimum planting density in combination with nutrient supply is key to getting the maximum maize yield,” says Muhammad Asim, a senior researcher with the Cereal Crops Research Institute (CCRI). “The precision planter helps farmers achieve this while also getting a uniform crop stand and uniform cobs.”
Maize farmer Jalees Ahmed (right) operates his push row planter. (Photo: Kashif Syed/CIMMYT)
Jalees Ahmed, a smallholder maize farmer from the Nowshera district, Khyber Pakhtunkhwa, received a push row planter through CIMMYT’s AIP program. He used to hire six laborers to plant one acre of maize, but with the push row planter, Jalees only needs to hire one laborer and benefits from a more uniform crop.
Raham Dil, another farmer in the Mardan district, recently purchased a push row planter for his farm which he also rents to fellow farmers in the area.
Maize farmer Raham Dil stands for a portrait with his push row planter. (Photo: Kashif Syed/CIMMYT)
Both Ahmed and Dil say these planters have made it easier to support their families financially. Interest in precision planters continues to grow.
Last fall, more than 80 farmers attended a field day in the Nowshera district where CIMMYT researchers demonstrated how to use the precision planter to sow maize. CIMMYT’s country representative for Pakistan, Imtiaz Muhammad, highlighted the importance of mechanized maize planting for farmers and CIMMYT’s commitment to improve maize-based system productivity in less developed regions of the country.
Farmers in Nowshera district attend a demonstration on how to use the tractor-operated precision maize planter. (Photo: Kashif Syed/CIMMYT)
The Agricultural Innovation Program for Pakistan is led by CIMMYT and funded by USAID. This project seeks to increase productivity and incomes by testing and promoting modern practices for agriculture’s major sub-sectors in the country.
Iván Ortiz-Monasterio is an agronomist and principal scientist at CIMMYT. He focuses on plant nutrition and soil fertility as a means to improve nutrient use efficiency in cereal systems through crop management and improvement, with the objective of increasing productivity, nutritional quality and profitability while reducing environmental impact.
His research has involved the development of technologies as well as technology transfer to farmers’ fields, with emphasis on the use of precision agriculture with optical sensors for nutrient diagnosis. He has also works on the application of remote sensing in agriculture.
