Tending to Orphan Crops of the World

By Laura Dorle, Intern

Peanut's harvested from UMN plot in 2011

Last summer, CTI and the University of Minnesota (UMN) collaborated in growing six “Orphan Crops”: tef, finger millet, pearl millet, sorghum, grain amaranth, and groundnuts (peanuts).

Orphan crops are important food crops for subsistence farmers in many African as well as Asian and South American communities, as they have a strong cultural importance, and are often more nutritious and drought resistant than many of the large commodity crops.

Most agricultural research has focused on increasing the yields of commodity crops, such as wheat or corn. However, simply growing more food is not enough—not when between 15-50% of crops are lost after harvest, often due to post-harvest spoilage and inefficient processing methods. That is why CTI is committed to filling some of the gaps in the research by working on orphan crops, focusing on the post-harvest side of the value chain helping bring rural farmers out of subsistence living while improving their livelihoods.

Tiffanie Stone, a recent graduate of the University, was the student intern on the St. Paul Campus plot last year with the guidance of Agronomy Professor Paul Porter and other UMN and CTI colleagues.

This year, we are at it again, and I’ve joined the team, along with many of the great folks from CTI and UMN who originated the project.  I’m Laura Dorle, student intern with the Orphan Crops project and a junior in the Environmental Science, Policy, and Management Program at the U. With a particular interest in food, agriculture, and international development, and a great desire to learn a lot more in those areas, this project was the perfect opportunity to do so.

The plot has been off to a good start thus far. The crops were planted in late May. In addition to the crops from last year, we also planted cowpeas, fonio, quinoa, mung beans, and Bambara groundnuts. Most have been doing very well, despite heavy rains early and intense heat. As usual, there is group of stealthy weeds that are thriving right along with them, and a lot of volunteers have been out there working hard to battle them, the leafhoppers, and Japanese beetles.

When the crops begin to mature at the end of the summer through the fall, we’ll be able to use them to do field tests of CTI’s post-harvest equipment including prototypes of groundnut processing technologies that are being developed for a program in Malawi and Tanzania funded by the McKnight Foundation. We will also be testing CTI’s new pearl millet processing suite on additional grains.

I’m really excited to be working on this project. Be sure to stay tuned. More updates to come as the process continues! And we’ll be organizing some field visits starting in mid-August!

~Laura

"It is good." -- Ethiopian women react to Pepper Eater prototype

By Roger Wilson, CTI volunteer project lead

Roger Wilson in Ethiopia testing a new prototype technology, the Pepper Eater. An estimated 400,000 women in Ethiopia process peppers by hand; a laborious procedure that turns peppers into higher-value products of dried flakes, seeds, and powder. The Pepper Eater (featured in National Geographic) is a device in development that mills dried peppers with a hand-crank much faster and safer than the traditional method of flaking peppers by hand. The Pepper Eater concept was developed by students at Stanford University, and was recently redesigned in a collaboration between CTI engineers and the Stanford team. CTI volunteer Roger Wilson and the Stanford team are in Ethiopia meeting with women who are evaluating the new Pepper Eater prototype.  

We set up today with the table across the street from the Encino Berbere market (Berbere is a pepper, or spice mixture that is a staple ingredient in Ethiopian cuisine). The crowd was instant. It took some work to get the children and men back far enough to let the women look and try the Pepper Eater (here called the Berbere Machine) and the grinder. I am working on trying to get shades of grey in the translation of the responses of the women because what I am getting is, “It is good.” I think that means it is fine; yes I can use the product, whether it be from the Pepper Eater or the grinder. So the Pepper Eater was liked. We did grind some of the Berbere that we had flakes with smiles and yes it was good.

To demonstrate the grinder we not only ground Berbere, but used CTI's prototype poly burr to break the husk and split peas, which were then winnowed by hand and we ground the split pea as normal with the metal burrs. The beans we cracked with metal burrs, winnowed, and then ground. The shiro (powder) produced by both the peas and beans caused eyes to light up and the comment, “That sure is easier than pounding!” One woman was excited and immediately wanted a grind with a motor; she had big plans quickly.

Aschalech Jemal, a University Grad in Agriculture who's working with me, said that word of mouth will transmit what the women say quickly so the demo will be pretty widely talked about. Another component she picked up on is that the success of introducing either of these technologies is dependent on Ethiopians making it happen. She has the vision that this does provide business opportunities in several different ways and venues.

So far, our health has been good. The tomato crop is yielding well and thankfully the Project Mercy cook's know how to make a safe and delicious salad that is often nearly half tomatoes. Just for fun they throw in the occasional Mitmita bit (Thai like hot pepper.) The locals seem to know pretty well when this are dry enough to work. Yesterday in the market was interesting because Asfew turned down many vendors because the Berbere was too flexible, i.e. washed and still too wet. We bought them at the Butajira market because the administrator here said the merchants were less flexible at the other markets and there was a choice here, which seemed to be true.

At the end of the trip today, I asked that we stop in Butajira at the hotel so I could buy a drink for the five people that went to Encino. It cost a whole 25 Birr for 5 machiato (like espresso with steamed/foamed milk); mine was delicious. There is nowhere in the Twin Cities that I could get a coffee like that for myself for the $1.50, much less five people. So there are some good things lighten the rest of the work.

Triggering Finger Millet to Flower

By Tiffanie Stone, CTI Intern

Now that summer is coming to a close weeding has become less of a priority. Most of the crops are already setting seed. However, there is still one plant that has not even begun to flower. Finger millet has been at about the same height and state for quite a few weeks now. For a while Tom Frantz and I thought that the plants had begun to flower. What we were seeing turned out to be none other than our good friend barnyard grass. Barnyard grass and assorted other weeds grew within the rows and within the bunches of plants themselves. In our plot we are growing two varieties of finger millet. One variety was brought back from Malawi with Steve Clarke. The other variety was from Dr. P.V.V. Prasad who grew it at Kansas State. After we realized that none of the finger millet had begun to flower we were briefly puzzled until we remembered something that came up many months before. 

Whilst planning for this project we read that a few of the plants may have photoperiod sensitivity. This means that if the plant is exposed to too much light it will not begin to flower. Steve Clarke went back to the Lost Crops of Africa book which confirmed that finger millet is a short-day plant with 12-hours being the optimum amount of sun exposure for most varieties. We decided to start our trial immediately. We figured that we may be able to trigger the finger millet flowering in 7 to 10 days. Paul Porter had access to a large tarp and Dick Wenkel found 6 large tubs that were not being used right on campus. Tom Frantz and I with assistance from Bert Rivers, Steve Clarke and Paul Porter have been setting up the coverings for the plants at 8 pm. We have been uncovering them by 8:30 am. This insures the plants get the full 12 hours of darkness. We started the trial on the night of Thursday the 11th. We have seen a few plants of the Kansas variety begin to flower thus far. We continued to cover the same section for the full 10 day trial. On Monday the 22nd we moved the tarp and will try to trigger flowering on another section of plants.

I would like to say a special thank you to Tom Frantz who has been a huge help with this project from the moment he heard about it. He a new volunteer at CTI and has put in countless hours weeding. He has been instrumental in this trial. This whole project has been a learning experience. Thus far, the project has been going well but we will continue to improve our methods for even more success next year.

Lost Crops of Africa: African Crops (and Weeds) Thriving

Groundnuts (peanuts) growing at the CTI/UMN plot

By Tiffanie Stone, CTI Intern

Everything is growing and thriving, including the weed population. From day one, we knew that weeds would be the biggest obstacle to overcome with this project. Most of the crops were planted in 30 inch rows which can be cultivated. The only weeds we need to worry about with these are within the rows, thanks to Dick Winkel and his cultivator. Watching Dick handle this one- row cultivator is like watching a master at work.

The teff varieties and the amaranth were planted in 6 inch rows which makes it impossible to cultivate and difficult to hand weed. To help control the weeds we used herbicides. We sprayed Select on the amaranth two weeks ago which killed all the grass weeds. It took several days for Select to kick in, but it kicked all the grasses effectively. Now the biggest problems are the many off types and red root pigweeds that need to be pulled by hand. This week we sprayed the teff with a broad leaf herbicide called Arctic 3.2. It worked like a charm; the effects could be seen the very next day. Hopefully, they will kill the broad leaf weeds completely. Grasses, especially barn yard grass still needs to be pulled out from the teff, but the herbicide was a huge help.

Due to the warm weather we had quite a leaf hopper population in the groundnuts (peanuts). Leaf hoppers are partial to legumes, so only the groundnuts were infested. They were just starting to show signs of distress. Thankfully, we were able to diagnose and spray with an insecticide to take care of the problem. The peanuts may need to be sprayed every two weeks. We will spray on at an as needed basis.

Having the support of the many great people at the U of M and at CTI has been invaluable. I don’t believe in magic elves, so I know some of you are weeding when I am not here. I see the evidences all the time. You are all making this project possible. I want to end with a big thank you to all who have contributed to the project in any way, shape or form. I so appreciate it!

Rescuing the Lost Crops of Africa

For the second time in just three years, we are facing a global food crisis as a result of rapidly rising food prices. In developing countries, where individuals often spend half of their income on food, record high food prices have pushed 44 million people into extreme poverty and hunger since June of 2010. As the world’s population grows, spikes in food prices are expected to continue, and important safety nets such as emergency food aid will not be able to keep up.

CTI is committed to creating inventive, sustainable solutions to address these challenges. Simply growing more food is not enough—not when between 15-50% of crops are lost after harvest, often due to post-harvest spoilage and inefficient processing methods.

In our Saint Paul workshop, CTI’s engineers have developed a prototype grain processing system that significantly reduces post-harvest losses, essentially doubling the amount of pearl millet grain farmers can produce. Though we are thrilled with the results, gaining access to pearl millet grain for testing prototypes has been a challenge. Pearl millet may feed 500 million people in Africa and Asia, but you won’t find freshly harvested pearl millet to test in Minnesota. While some grain stocks have been made available from generous donors such as USDA in Georgia, without ready access to pearl millet and other African crops, CTI’s engineers often have to send even initial prototypes oversees for testing during harvest seasons — a costly, slow process and a barrier to innovation.

The Lost Crops of Africa project is a collaboration between CTI and the University of Minnesota (UMN) to grow seven African crops on one acre of land at UMN’s Saint Paul campus. With assistance from Professor Paul Porter and student assistant Tiffanie Stone, CTI will grow tef, finger millet, sorghum, fonio, pearl millet, grain amaranth, and groundnuts for processing. Although these crops are often unheard of by those living in more developed countries, they are commonly grown in different parts of Africa, where millions of people depend on them for their daily sustenance.

CTI will use the harvested African crops to develop and test post-harvest farming devices and tools for subsistence farmers. Growing the crops so close to home will allow our engineers to more easily refine new equipment to suit a particular crop. This way, when CTI brings new prototypes to Africa, we can minimize last minute “surprises” and reduce the time needed to reach user-acceptable solutions. Ultimately, this means CTI will be able to deliver more appropriate technologies faster and at a lower cost to our donors and our end-users.

In addition to the one acre plot of land, UMN has generously provided a student assistant to help oversee the Lost Crops of Africa program. Tiffanie Stone is studying Applied Plant Science and International Agriculture at UMN. Tiffanie will be contributing to CTI’s blog, where she’ll write updates on the challenges and triumphs that are thrown our way.

International Day of the African Child

By Andrea Brovold, CTI Program Manager

Today is International Day of the African Child, a day commemorated every year on June 16, when in 1991 thousands of South African children marched and hundreds died in Soweto demanding the right to be taught in their own language. This year, on the 20th anniversary of that tragedy, the African Union is calling attention to the 30 million “street children” who live across the continent.

Westerners who have traveled to developing countries have probably encountered child beggars on the streets. "Street Kids" are plentiful in Senegal and Mali, around every corner you turn. These children end up on the streets because they were never given a chance for a childhood or an education. Some street kids are recruited by terrorist organizations; they are required to bring back 50 CFA daily, and if they don't bring back their daily allotment, they are beaten.

Since returning from West Africa this past winter, these are the beautiful faces both haunt me and push me to do the work we do at Compatible Technology International. Though many of Africa’s children are born into poverty, that doesn’t mean they shouldn’t have every opportunity to flourish.


While providing grinder training in Senegal last November, I met Roykia, a bright eyed energetic 11 year old girl. Though many of the other villagers were hesitant to use what must have looked like an odd, foreign machine, Roykia jumped right in and instructed the others, “We want finer flour, tighten the wing nut!” The grinder in that village is now used daily, allowing women to easily produce fine flour and peanut paste. The women are able to grind in 5 minutes what would have taken them traditionally in a mortar and pestle 45 minutes. Roykia’s community now have the opportunity to spend their free time and extra income pursuing educations or starting businesses—all because of the initiative of an 11 year old girl. I look forward to returning to her community on behalf of NCBA/USAID again this winter to continue our efforts in West Africa.

When you think of African children, it would be easy to conjure images of desperate, malnourished children with swollen bellies—the images we’ve all seen on television. But on this day, I will remember the beautiful, strong, determined children who should be proud to be Africa’s future.