By Carly Chaapel
In places where severe weather and pests threaten crop yields, farmers are turning to tunnel-shaped greenhouses that improve the quality of their vegetables, decrease the need for pesticides, and promise higher yields by protecting the plants from severe wind, frost, and hail.
CEDE Greenhouses manufactures greenhouses and tunnels to be implemented throughout southern Africa. Over the past 30 years, they have helped over 350 farmers start their own greenhouse businesses. Recently, CEDE partnered with Klein Karoo Seed Marketing Company to create the Africa Tunnel. Its simple design consists of plastic cloth and supporting beams, and makes it possible for new farmers to enter the business.
Greenhouses can be valuable tools for protecting plants from harsh environmental conditions while also extending the growing season. Where sunlight is lacking, the structure can optimize what light it receives by trapping the long-wave-length heat radiation that is reemitted by objects within the greenhouse walls. In arid or semi-arid regions such as Kenya, greenhouses can lower temperatures by blocking some light with shade cloths and encouraging swift ventilation. Greenhouses may also limit the amount of water that plants lose through transpiration, which can significantly improve yields where water is in short supply. In sub-Saharan Africa, only 0.2 percent of the total agricultural land is irrigated.
In addition to manufacturing the materials necessary for tunnel farming, CEDE also offers training sessions for sustainable crop production. The company teaches farmers how to sow seeds, manage plant growth, and finally market their own fruits and vegetables.