Cassava more popular among the older populations in major cities in Tanzania

Over a half of the population in the three major cities in Tanzania eat cassava but nearly everyone eats maize.Furthermore, the hardy root crop, was found to be more popular among the older people who preferred  it in the form of ‘ugali’ made from its flour while the young population mostly ate it boiled.

Dr Adebayo Abass, IITA's value addition specialist briefs the cassava processors on the harmonized cassava flour standard

There is therefore a huge potential to increase the market for cassava in the country by getting more people to eat it especially the urban youth says Dr Adebayo Abass, a value chain specialist from the International Institute of Tropical Agriculture (IITA). 

Dr Abass was speaking at a recent training on standards for cassava flour in East Africa for cassava processors from Kigoma, Pwani and Mwanza regions held at the Lake Zone Agricultural Research Institute (LZARD) in Mwanza. The five East Africa countries harmonized their standards for cassava and potato and their products to facilitate cross-border trade.

Dr Abass said the study commissioned by IITA and conducted by Consumer Insight, asked 1,464 people in the major cities in Tanzania the important crops in their daily food. Over a half of them, 53% said they ate cassava compared to 100% of maize. 65% of them said they ate it boiled cassava while 67% consumed it as a stiff porridge ‘ugali’ made from the flour. 

Anna Mhalu from the Tanzania Bureau of Standards (second from left) oversees the practical session during the training on standards.

 “Looking at age differences, a majority of the young people between 18-24 consumed boiled cassava while among the older generation, most preferred to eat ugali made from its flour. Most of the younger people (70%)said they would like to eat cassava ugali, if the flour was white and not smelly” he said.

According to the researcher, ugali made from some traditional cassava flour is smelly while the modern processing method developed by IITA through and tested in collaboration with the Ministry of Agriculture, Food Security and Cooperation (MAFC) and the Tanzania Food and Nutrition Center (TFNC) and other partners gives non-smelly cassava ugali.

According to the study, conducted between May and July 2013, the region with the highest consumers of cassava was Mwanza and mostly in the form of cassava ugali. It was least popular in Arusha possibly because the cassava flour available in the market is grey in color (33%).

Looking at quality issues, the study found that 44% of the population wanted the cassava flour to be finely milled, 33% said they did not want smelly flour and 30% wanted it white in colour. And when asked where they wanted to buy their flour, majority said at the kiosks in the neighborhood. Only 9% said the supermarkets. Two thirds of the people interviewed also said they found it difficult to find the cassava flour because it was not available in the kiosks.

The processors spread the dried cassava mash on a raised platform to keep off livestock and dust to avoid contamination of the floor and preferably on dry black plastic bags which trap heat hastening the drying process.

Abass further advised the processors, “Looking at the whole population, majority want the flour to be white and finely milled. No one wants grey and smelly flour. That is how you should process your flour. Many of you have been targeting supermarkets, now you need to start considering the kiosks– the small shops within the residences.”

Dr Abass also added that a majority of those interviewed said that they did not want the cassava and maize flours mixed together by the processors. They prefer to buy each separately and mix at home themselves as they wish. They also preferred the packing to be in one kg packets.

The training was conducted by researchers from IITA and Tanzania Bureau of Standards (TBS) with funds from Association for Strengthening Agriculture Research in East and Central Africa, (ASARECA).

Work smart not hard - Boosting productivity of small-holder farmers through smarter farming practices

A man and his wife who are small-holder farmers, display their harvest of cassava and banana, two important staples in Sub-Sahara Africa. 

They have small farms, big families and few animals. They grow different types of crops to spread their risks and lack resources to invest in inputs such as fertilizers and pesticides to boost their production. They are at the mercy of the weather; when it rains their harvest is abundant, when it fails, their granaries are empty and they sometimes require food aid.

These are the small-holder farmers in Rwanda, Burundi and Uganda that Dr. Piet Van Asten, a system's agronomist with the International Institute of Tropical Agriculture (IITA) is trying to work with to ensure they get the most out of what they have. However, they represent a majority of small-holder farmers in Africa.
He works for the Consortium for improving agriculture based livelihoods in Central Africa (CIALCA) which brings together many partners to improve the livelihoods of small-holder farmers. IITA is one of the founding partners.

Too many challenges, where does one start? According to Van Asten, the starting point to improve the productivity of their farming systems is to understand their constraints and to try and identify the one or two issues that if tackled can have great positive impact. He says using tools such as yield gap analysis which looks at the actual productivity of the small holders farmers against the maximum yield they can get in the same circumstances, they have been able to make some headway.

Poor old soils

Dr Piet Van Asten, IITA systems agronomist. 

Van Asten says, focusing primarily on banana, they have established that poor soils are one of the most important constraints to the crop's production by the small-holder farmers in the three countries. Most soils, he said, were old, from old parent rocks and had very little nutrients left.


It therefore follows logically that supporting the farmers to use inputs such as fertilizer was one of the best-bet technologies to increase their production. However, Van Asten cautions, this must be applied based on the actual soil deficiency and include factors such as distance from the farms to market and banana prices.

"Investing in fertilizer does not always lead to profits for the farmers. They can only get value for their money if they live near markets or infrastructure is good and they are able to fetch good prices for their banana. They must also know which nutrients their soils are lacking and which are important for the crops they are growing. They should not follow blanket recommendations as is always the case," he said.

For example he said, they established that potassium, which plays a big role in banana production, was lacking in most soils in the three countries. Yet, the addition of the mineral led to great gains in banana production. Furthermore, Van Asten said, the banana plants that received adequate potassium fared better in times of drought.

He says the impact of adding nutrients to the soils was visible even at the farm level where bananas growing near the homesteads were healthier than those further down.

"This is because the soil closer to the homestead benefited from kitchen wastes as women tend not to walk far to throw away the rubbish. For example, ashes from the fire add calcium to the soils, "he said. "Food wastes add organic matter."

Banana growing near a homestead where the soil is often more fertile from kitchen waste 

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Which crops give the highest returns?

Most African farmers practice mixed farming. The question therefore arises, with the little limited resources at their disposal, which crop would give them the highest return from fertilizer application and how do they make these decisions?

Van Asten says according to a scooping study they carried out in the three countries, they were surprised to discover that farmers would get the highest return from coffee, cassava and banana and not maize and beans which they gave preference.

"Coffee, banana and even cassava in the long run proved to be better value for money invested in fertilizer in terms of replenishing nutrient extracted in the soils and returns per dollar invested. However, farmers only see the immediate gains in maize and beans.

"Farmers still have to make the decision carefully because for example, once they start fertilizing their coffee it would be best if they can continue. If they stop, the coffee can't maintain its canopy and yields and will show some die-back. This fuels farmers' belief that fertilizer is bad and spoils soils," he said.

Coffee and banana - super mix

Coffee and banana intercrop. 

Other practices that were found to increase yield include inter-cropping banana and coffee. Piet says the farmers got more out of their land by growing the two crops together than having either of them alone. These findings he said are slowing leading to a change of hearts among policy makers who have for a long time preached mono-cropping of coffee in Rwanda and Burundi. This is because coffee is an import foreign exchange earner and they did not want anything to affect its production.

He said their research was not inventing anything new. Rather it was based on finding out what the best farmers were doing to get their good yields and helping the others to adopt them.

"Some of the best banana farmers get as much as 40 tons per hectare. We try to understand what they are doing and why, and then promote it to wider farmers in the community and even further," he said.

However, he says they don't always agree with the farmers views. For example, most farmers judge the productivity of their banana by the size of the bunches.

"To us, this is not the best indicator. We instead look at productivity per hectare. A farmer may have smaller bunches but more plants therefore his overall productivity is higher than the one with huge bunches but fewer plants. We therefore have been working with them to plant as many bananas as their land can accommodate based on its soil fertility, rainfall, among others" he said.

Piet says under CIALCA they have mapped most of the soils in the three countries and developed fertilizer usage recommendations that are region specific. They have also developed and are disseminating the rich information gathered on various ways that small-holder farmers can increase banana production. The crop is among their most important food and cash crop in the three countries but its productivity is very low.

Group riding high, thanks to an old friend, cassava

“With the money I made from the sale of my cassava roots and stem (as planting material) and the dividends I received from the group, I have now finished constructing a video den, purchased a TV and a DVD player, and installed a solar system to power them. I will be charging the villagers a small fee to watch news and movies,” Peter Mtoi, 61 year old shows us his latest acquisition with pride.


By his side, his wife, Mary Mtoi, 51, adds that they have also purchased a commercial charcoal oven to bake bread and cakes made of mixed cassava and wheat flour to sell to the village and nearby shopping centre.

The Mtois living in Tongwe village in Bagamoyo District, Pwani region are members of a local cassava farmers group, Wambato (Wakulima wa mhogo Bagamoyo Tongwe) which has been processing cassava into flour thereby getting more income as compared to the sale of fresh roots.

Ten years ago, things were very different and they had almost given up growing cassava following its devastation by the cassava brown streak (CBSD) which causes a dry rot in the tubers rendering them useless – they are not edible nor can they be milled into flour. All their local varieties were susceptible to the rot disease and they were desperate.

The Roots and Tuber programme of the Ministry of Agriculture, Livestock, and Cooperatives introduced and tested together with the farmers six varieties growing elsewhere that had shown good levels of resistance to the disease.

‘Out of the six varieties they brought us for testing, we found Kiroba to the best. It was high yielding, resistant to the disease and sweet,’ Mtoi said.

They were also trained on good agronomical practices to get maximum yield such as when and how to plant, spacing and selection of good planting material. Soon the group was back to the cassava growing business.

Cassava cassava everywhere


However, following the rapid adoption of Kiroba and better farming practices, there was now more cassava than the markets could absorb, prices plummeted and the farmers were in despair again.

The Sokoine University of Agriculture (SUA) came to their rescue and constructed a processing centre equipped with simple machines to process cassava into flour which has a longer shelf life and fetches more money than the highly perishable fresh cassava roots which start to rot three days after harvesting. To show its commitment, the group purchased the bricks and provide labour for the construction.

From 2009, the group has been receiving support from the Unleashing the Power of the Cassava in Africa (UPOCA) of the International Institute of Tropical Agriculture (IITA) in tackling emerging challenges to take their production to a higher level.

In 2009 the project trained Tabu Maghembe, the government extension officer working with the group and selected representatives on production of high quality cassava flour and new products and recipes using the flour; quality and safety management, and labelling, packaging and marketing.

The group warmly welcomed and implemented all the new ideas received on their own costs. It has since constructed a toilet at the centre, raised the racks for drying the cassava to avoid contamination by dust or domestic animals, and started using plastic bags to spread the cassava chips to dry.

‘As you can see we have notices for everyone to wash their hands before touching anything as per the hygiene quality and standards training, ‘Maghembe said. “We are working towards getting our flour certified by the Tanzania Bureau of Standards.”


A credit scheme

The group has a bank account and pays dividends to its members twice a year from some of the profits made. It also buys their cassava for processing and pays them a daily wage for their labour during processing. The neighbouring community is also benefiting from a ready and better priced market for their cassava.

It also acts as a saving and credit society for both members and surrounding farmers who borrow money for emergencies against the cassava in the field. Once they harvest it, they sell it to the group to repay the loan with a small interest.

One challenge for the group is transporting their dried cassava chips over long distances for milling. The mills are also not exclusive for cassava products and the flour is sometimes contaminated with maize and other grains flour. John Msemo, UPOCA country Mananger says the project will purchase a milling machine for the group and they construct the building to house it.

For the group, this is just but the begining:‘We are ready to continue to grow from strength to strength. We started from the farm and now we are processing and selling to supermarkets in big towns. We are now eyeing markets outside the country,’ said Maghembe.