Chipinge irrigation farmers are reducing fertiliser costs and boosting bean yields after adopting Rhizobia “N-Fixer” inoculant, a biological alternative that replaces up to five bags of Ammonium Nitrate with a single US$40 packet.
Farmers are now harnessing naturally occurring bacteria to improve legume yields. SPRL soil scientist Grace Kanonge said, “Empowering farmers with this biological tool doesn't just cut costs—it anchors a sustainable future for Manicaland’s irrigation schemes.”
Farmers have established trial plots to show that the modest investment can yield over two tonnes per hectare of sugar beans.
The adoption drive spans 17 irrigation blocks seven in Chibuwe and 10 in Musikavanhu. In Chibuwe C Extension, 82 farmers are preparing to plant 45 hectares of sugar beans following maize harvests.
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Chipinge District Agricultural Extension Officer Chitesa said, “Our role is to ensure farmers understand how to correctly apply Rhizobia inoculants and adopt good agronomic practices to maximise yields.”
Agricultural Business Advisory Officer Matsiya added, “When farmers take the lead in technology adoption, supported by expert guidance, the entire irrigation community benefits.”
Farmers operate on 0.5-hectare plots individually but manage larger blocks collectively under the “Munda Murefu” (Tensor) joint venture.
The model is coordinated by an Irrigation Management Committee and Agritex staff. Fish pond construction on remaining land is turning the cluster into a diversified rural production hub.
Kanonge said, “This model shows that smallholder farmers can drive climate-smart and economically viable agriculture when provided with the right tools and knowledge.”
He said the initiative could redefine input efficiency and value-chain competitiveness across Manicaland.
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