Feed the Future
This project is part of the U.S. Government's global hunger and food security initiative.

Soybean Innovation Lab is Mechanizing Agriculture Across Africa With Multi-Crop Thresher

If you’d like to learn more about how to become an in-country partner to train young people to manufacture, operate and repair the SIL multi-crop thresher, or are interested in getting a thresher yourself, please contact Dr. Kerry Clark, Mechanization Lead, Soybean Innovation Lab, and Director of CAFNR International Programs and Assistant Research Professor, University of Missouri.

Many smallholder farmers in the tropics do not have access to durable and affordable harvest equipment such as crop threshers. When the Feed the Future Innovation Lab for Soybean Value Chain Research (SIL) began their work in Ghana in 2016, they saw a pressing need for mechanized crop threshers to relieve the huge burden of stick threshing that is often done by women and young people.

SIL held a contest between three U.S. and three Ghanaian universities for students to develop a thresher for local fabrication by village blacksmiths at a manageable price. Jeffrey Appiagyei, a 2017 graduate of Kwame Nkrumah University of Science and Technology in Kumasi, Ghana, was one of the winners of the contest and turned that success into a career and a mission. “I want to change things at the national level,” said Jeffrey. “I want young people to see the potential of the huge African market and the vast space available for locally produced, high quality agricultural equipment. To accomplish sweeping change in the technological ability of a community or country to support its entire agricultural value chain, local innovation and machinery fabrication is essential.”

Appiagyei works with the Soybean Innovation Lab to create and provide training programs for young engineers, equipment fabricators, and vocational schools to enable the local manufacture of agricultural equipment such as the SIL Multi-Crop Thresher. Together with Appiagyei’s company SAYeTECH, the Soybean Innovation Lab is creating a local, skilled workforce for the fabrication of low-cost, locally-produced, multi-crop threshers to address the challenges of availability and affordability that prevent many smallholder farmers from scaling up their agricultural production. Locally-made also means locally-repaired. Local fabricators listen to customer needs and can customize equipment for individual or groups of end-users, and can provide maintenance and repair services locally.

SIL provides customized training workshops in multi-crop thresher fabrication across Sub-Saharan Africa. Workshops include training on business development, maintaining manufacturing quality and training and educating end-users of machines on operation and maintenance. Photo credit: Dr. Kerry Clark

Manual threshing, disproportionally carried out by women, is labor intensive and time consuming. SIL’s multi-crop thresher is 80 percent faster, requires only 2 operators, and reduces postharvest losses by 35 percent. It is designed to be quickly and easily switched between crops by changing out a perforated metal sieve concave. The hole sizes of the sieve depend on local crops and their average seed sizes, but in most locales only two sieves are needed: one for maize, beans, and other large-seeded crops; and another for soybean, rice, and grains of smaller size. The thresher sits on a metal frame with four wheels and can be powered with a diesel engine or a tractor power takeoff.

Starting with just 12 fabricators from Ghana in 2016, SIL has now trained 142 fabricators across 7 countries to build, service and maintain threshers that can handle cowpea, maize, soybean, millet, sorghum, and rice. For each training, the in-country partner recruits the fabricators, finds the training facility, finances the materials for production, and supports the trainees with food during the training hours. The Soybean Innovation Lab can train 10–20 people at a time and build 1–3 threshers during the week-long training.

For local fabrication to then reach smallholder farmers, organizations must make strong efforts to connect the manufacturers with people who can buy the threshers. Assistance from Catholic Relief Services and SIL with promotional events, such as thresher demonstrations at field days or farmer fairs, has helped recruit customers for fabricators in Ghana, where over 100 multi-crop threshers are now in use.

SAYeTECH product manager, Rudy Ofori conducted a live demonstration of the SIL/SAYeTECH Multi-crop Thresher at SIL’s annual Kick-off event in Nyankpala, Ghana in October of 2019. The event brought together over 200 people from 14 different African countries and 76 different organizations.

Since 2018, SAYeTECH and SIL have provided training in crop thresher fabrication in Ghana, Malawi, Uganda, Tanzania, Burundi, Rwanda, and Ethiopia, with additional trainings to be held in Kenya, Nigeria, and Zimbabwe. Each machine produced by the newly empowered fabricators has the potential to serve 200 farmers and reduce two weeks of stick threshing per acre of crop to four hours labor with the SIL/SAYeTECH mechanized multi-crop thresher.

SIL has trained 142 fabricators across 7 countries in Africa since 2016, with the intent to add Kenya, Nigeria, and Zimbabwe to that list in 2020.

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