Solar-Powered Threshers Give Traditional Grains A New Future In Dry Zimbabwe Districts
On a hot afternoon at Freedom Square in Binga, women in bright wraps stood shoulder to shoulder under a khaki tent, eyes fixed on an unusual machine gleaming in the sun. For years, their harvest of sorghum and millet has meant long nights of beating, winnowing, and roasting – up to half a day’s work just to process a single 20kg bucket. This time, as a solar-powered thresher hummed to life with a simple push of a button, the mood shifted from resignation to curiosity, and then to hope.
Marondera University of Agricultural Sciences and Technology (MUAST) has handed over new solar-powered multigrain threshers and engineering equipment to communities in Binga, in a move officials say is designed to remove one of the biggest bottlenecks holding back traditional grain production in Zimbabwe’s driest districts.
The handover ceremony, held last Wednesday at Freedom Square, brought together traditional leaders, development partners, and senior Government officials. It marked a practical step towards climate-smart agriculture under Zimbabwe’s Agriculture Food Systems and Rural Transformation Strategy 2 (AFSRTS 2), 2026–2030, which targets agro‑ecological regions IV and V – areas on the frontline of El Niño‑induced drought and failed maize harvests.
Why Labour Is The Missing Link In Traditional Grain Revival
AFSRTS 2 and the Government’s climate-proofing agenda encourage farmers in drought-prone zones to pivot from maize to traditional grains such as sorghum and millet, which are more tolerant of heat and low, erratic rainfall. Through the Presidential Input Scheme, smallholders in these regions receive free seed and inputs for these crops.
On paper, the logic is clear: traditional grains are more resilient and more nutritious. In practice, many households have been reluctant to scale up because of what happens after harvest.
Speaking from Mutoko, Village Head Bvunzawabaya captured a complaint heard across the drylands.
“Many people cultivate sorghum and millet on small plots because of the labour-intensive work involved in processing these grains,” he said.
A baseline study by MUAST and University College Cork (UCC) of Ireland in Binga and Mudzi districts quantified that burden. Processing a single 20kg bucket of traditional grains – from threshing to roasting – can take between 8 and 12 hours.
For women, who shoulder most post-harvest work, this time cost directly limits how much land a family dares to plant.
FFA Explainer:
Threshing is the process of separating grain from chaff and stalks after harvesting. For sorghum and millet, this often involves beating the crop with sticks or trampling it, then winnowing by hand. Mechanised threshers replace hours of manual labour with a short machine run.
From Diesel To Solar: A New Kind Of Thresher
Government and development partners have previously tried to ease this burden by introducing diesel-powered threshers. They helped – but came with their own hurdles.
- Fuel was expensive and not always available in remote wards.
- Machines often required strenuous manual cranking to start.
- The effort was particularly tough for women and children, who are often the ones operating them.
MUAST engineers went back to the drawing board. The result is an innovative solar-powered multigrain thresher that:
- Runs entirely on clean, renewable solar energy, needing no diesel or oil,
- Starts with a simple push-button system – no manual cranking,
- Is designed to handle multiple traditional grains, including sorghum and millet.
MUAST Vice Chancellor, Professor Justice Nyamangara, said the university developed the technology specifically to support Government’s fight against hunger and malnutrition by unlocking the full potential of traditional grains.
“These threshers not only reduce processing time and manual labour but also improve food safety by minimising contamination risks,” he said.
By cutting processing time from hours to minutes, the machines free up labour for other farm tasks, allow families to plant larger areas, and reduce grain losses caused by spillage, pests, or mould during lengthy traditional processing.
Building Skills So Machines Do Not Die In The Yard
One of the most common criticisms of past mechanisation drives in rural Zimbabwe is simple: machines arrive with fanfare, work for a season or two, then sit broken in a shed because no one nearby can repair them.
MUAST says it is determined not to repeat that story.
“MUAST also signed a Memorandum of Understanding with Kulima Mbobumi, a Binga community-based organisation,” Prof Nyamangara said.
The agreement will see 20 community members trained in welding and fabrication as part of the traditional grain mechanisation initiative.
“These trainings are about developing local technical capacity, ownership, maintenance skills and long-term sustainability,” he added.
The idea is that communities will not only operate the threshers, but also manufacture parts, carry out basic repairs, and eventually build additional units themselves.
Office of the President and Cabinet Food and Nutrition Council director-general, Mr George Kembo, underlined the importance of this approach.
“MUAST is living up to the mantra of leaving no one and no place behind,” he said at the ceremony, noting that empowering local metalworkers and youth to fabricate and fix the machines was as important as the technology itself.
Small Machines, Big Strategy
By the end of this month, four solar-powered threshers are expected to be distributed to Binga and Mutoko districts – both highly vulnerable to climate shocks. Through its partnership with UCC, MUAST aims to gradually expand coverage and refine designs based on user feedback.
Though four machines might sound modest against the scale of need, officials see them as pilot units in a wider shift:
- Towards climate-smart agriculture that treats traditional grains as core crops, not poor cousins of maize,
- Towards decentralised mechanisation anchored in local skills, and
- Towards lower-carbon food systems, in line with AU Agenda 2063 and the UN SDGs on climate action and zero hunger.
For rural women and youth in Binga or Mudzi, the implications are immediate. With a reliable, low-cost way to thresh sorghum and millet:
- Households can expand planted area without fearing unmanageable post-harvest labour,
- Processing groups or cooperatives can offer fee-based services, creating local businesses, and
- Children, especially girls, may spend less time pounding grain and more time in school.
FFA Explainer:
Climate-smart agriculture refers to practices and technologies that increase productivity, enhance resilience to climate shocks, and reduce emissions where possible. In semi-arid Zimbabwe, this often means shifting from thirsty maize to drought-tolerant traditional grains, supported by appropriate mechanisation and markets.
From Maize-Heavy Research To Millet And Sorghum Innovation
Prof Nyamangara acknowledged that much of Zimbabwe’s agricultural research and innovation has historically focused on maize – from breeding programmes to processing technologies.
The renewed attention to traditional grains signals a deliberate rebalancing.
Across the country, agronomists and nutritionists are increasingly highlighting the benefits of small grains in dryland diets, from iron-rich finger millet porridge for children to sorghum-based products for urban supermarkets. But without deep investment in post-harvest technologies – threshers, dehullers, small mills – farmers will struggle to meet growing demand.
By pairing solarised threshers with local fabrication training, MUAST and its partners are trying to build that missing link in the value chain, in line with NDS1’s call to industrialise agriculture and create rural jobs.
For farmers in Binga, the proof will be in the coming seasons. If a day of scorching labour on the threshing floor can be replaced by a short machine run under a solar panel, the argument for expanding sorghum and millet plots becomes far more compelling.
As the crowd at Freedom Square drifted away after the handover, some of the women lingered, running their fingers over the cool metal of the new thresher. For them, it was more than a machine. It was a promise that the hard work they already do for climate resilience might finally be matched by technology that respects their time and strengthens their harvests.
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