More than 80% of Tanzanian farmers rely on rainfed farming to support their livelihoods, and are increasingly negatively affected by climate change.
The Chololo Ecovillage was a three-year project funded as part of The Global Climate Change Alliance (GCCA), in an initiative aiming to test a holistic, integrated, village-scale approach to climate adaptation in vulnerable communities (European Commission 2015).
Agroecological approaches were identified with community participation to address key issues affecting residents. The project exemplified a village territory approach based on a large number of principles of agroecology, such as
- soil health land and natural resource governance; biodiversity; recycling; input reduction;
- animal health;
- economic diversification;
- participation and fairness; which guide the transition towards sustainable food and farming systems (HLPE 2019, Wezel et al. 2020).
The application of these different principles and more specifically some agroecological practices are illustrated in the following example.
Organic matter and soil biological activity can be enhanced through agroecological management, building healthy soils to support plant growth.
Farmers traditionally practiced shifting cultivation moving from a field to clear forested land once the soil fertility of a plot was depleted.
In recent years, no more uncleared land was available, so farmers continued to plant the same crop on the same plot of land, leading to low agricultural productivity.
Therefore, the project introduced agroecological soil management practices to replenish nutrients and reduce erosion. This included applying farmyard manure, which provides nutrients necessary for crop growth and further enhancing soil moisture.
Farmers learned to create contour ridges, bunds and infiltration ditches, and gully healing. These practices reduce flooding and washouts caused by intense rainfall, instead capturing water on farming fields.
Farmers found that these improved practices, combined with the use of improved seed varieties, increased their crop yields between about 20-400 % depending on year and crop for key crops such as maize, sorghum, pearl millet, sunflowers and groundnuts.
Recycling & Input reduction
One of the principles of agroecology aims to improve resource efficiency by replacing purchased inputs with local renewable resources, and recycling these resources within farming and food systems.
Farmers applied practices that more efficiently used and replenished local resources. Where farmers had previously planted only one crop year after year in a field, they began to intercrop in planting millet or sorghum with leguminous crops like cowpea or groundnut, and to diversified their crop rotations.
This reduced the need for synthetic fertilizer, replacing nitrogen and decreasing the depletion of other soil nutrients that occurs when only one crop is continuously planted on a field.
In addition, through integration of livestock and fish farming, farmers recycled manure and nutrient-rich water from fish ponds to apply to their field crops. Vice versa, crop residues were increasingly used to feed livestock.
Improving animal health and welfare strengthens the resilience of farming systems. Many residents of Chololo raised livestock before the project’s introduction, yet farmers explained how livestock disease affected their livelihoods, shortening the lifespan and productivity of their animals.
To address these issues, the project crossbred locally adapted breeds of cattle, goats, and chickens with improved breeds, e.g. crossbreeding with pure Mpwapwa cattle bulls.
Farmers also learned better livestock management, disease control, and dry season feeding.
These new practices kept animals healthier, and, when combined with improvements in the genetic potential of local breeds has increased meat, egg, and milk productivity.
Agroecological farming systems are characterized by high levels of species and genetic diversity. The project increased diversity on the field, farm, and landscape levels.
In addition to introducing new genetic potential to livestock populations, improved varieties of maize, sorghum, millet, cowpeas, and groundnuts were provided to farmers.
These varieties were developed in Tanzania to be higher yielding, but also more drought resistant and early maturing- traits farmers found helped them to adapt to later, less reliable rainfall during the growing season.
The project also trained farmers in fish production, further increasing farm-level diversity.
Beekeeping and tree planting enhanced biodiversity at the landscape level, increasing both pollinating services and habitat for wild flora and fauna
Land & Natural resource governance
Agroecological farming depends on ecosystem functioning and natural resources that can be enhanced through careful community planning and management.
Before the project, village members reported that deforestation was affecting their community, with little available animal forage, fuel wood and timber.
In response to these issues, many community members learned nursery management and afforestation, and grew and planted over 36,000 seedlings of trees valued for their fruit and firewood production and contributions to soil health. Most were planted on farmers’ land, although 3,000 trees were planted on a village forest reserve.
Community-level vulnerability to drought was reduced with the creation of sub-surface and sand dams, rainwater harvesting equipment, and water storage tanks. A solar powered water pump has replaced an electric pump, halving the cost of water.
The agroecological approach for economic diversification searches for giving farmers greater financial independence from markets with fluctuating or low prices for their produce as well as creating more income sources to be more resilient if a crop or production fails a certain year.
Farmer trained in innovative practices of beekeeping harvested three times more than with their traditional hives and were able to sell the surplus.
Building and stocking fish ponds provided another source of income, with producers selling fish to community members and fingerlings to other fish farmers.
Crop and livestock diversification gave farmers more options for food and income generation.
For example, farmers who crossbred local goat breeds with improved varieties, were able to double the price of the offspring and sell them a year earlier than their local breeds.
Project participants also learned to process leather and make sandals, adding value to a product they had once sold at a fraction (nearly 1/30th) of the price in the form of raw goatskin.
Fairness & Participation
Agroecological approaches seek to remedy social inequities that often characterize food and farming systems, and this project focused on issues of gender inequity.
The improvement of local chicken breeds increase productivity of an income source over which women have greater ownership they had more control. Women reported that they had earned more money from increased egg and chicken production.
Another initiative to alleviate unequal burdens related to gendered household roles, was the introduction of fuel efficient stoves. The stoves reduced fuel usage by 57%, and the associated work, typically carried out by women, of collecting firewood.
Social values & Diets
Food insecurity was a problem for the subsistence-oriented farmers who participated in the project.
Agroecological practices of farm- and field-level diversification provided farmers with greater access to a variety of nutrient-rich foods.
Fish farming and raising healthier and more productive livestock increased the amount of protein available to farming households, in the form of fish, eggs, milk, and meat.
Diversifying a farm-stead with fruit trees, and legume crops, created the opportunity for a more nutritious diet than when a farm only produced millet or sorghum.
In Chololo village project organized around agroecological principles, the integration of multiple practices creates positive ecological interactions and synergy between animals, crops, trees, soil and water leading also to higher and enhanced diversification in incomes and improvements in diets.
Participation and fairer distribution of income empowered also women and more general community members to act together for improved land and natural resource management.
- European Commission (2015). Chololo Ecovillage: a model of good practice in climate change adaptation and mitigation.
- HLPE 2019. Agroecological and other innovative approaches for sustainable agriculture and food systems that enhance food security and nutrition. A report by the High Level Panel of Experts on Food Security and Nutrition of the Committee on World Food Security, Rome.
- Wezel, A., Herren, B., Bezner Kerr, R., Barrios, E., Gonçalves, A., Sinclair, F. 2020. Agroecological principles and elements and their implications for transitioning to sustainable food systems. A review. Agronomy for Sustainable Development, 40: 40.