Yield gap decomposition: quantifying factors limiting soybean yield in Southern Africa

Soybean production in Sub-Saharan Africa (SSA) is increasing as its demand for food, feed, cash, and soil fertility improvement soars. Yet, the difference between the smallholder farmers’ yield and either the attainable or the potential is large. Here, we assessed the contribution of various crop ma...

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Bibliographic Details
Published in:Npj sustainable agriculture 2024-12, Vol.2 (1), p.1-11, Article 32
Main Authors: Omondi, John Okoth, Chiduwa, Mazvita Sheila, Kyei-Boahen, Stephen, Masikati, Patricia, Nyagumbo, Isaiah
Format: Article
Language:English
Subjects:
631/449/2661/2665
631/449/2661/2666
Agriculture
Earth and Environmental Science
Environment
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Summary:Soybean production in Sub-Saharan Africa (SSA) is increasing as its demand for food, feed, cash, and soil fertility improvement soars. Yet, the difference between the smallholder farmers’ yield and either the attainable or the potential is large. Here, we assessed the contribution of various crop management practices to yield gap, and the major factors limiting soybean yield increase per unit area. This study showed that besides soil nutrients and plant nutrition, soybean variety is the most limiting factor in Malawi and Zambia, whereas, in Mozambique, seed rate is significant. Overall, in the Southern Africa region (Malawi, Zambia, and Mozambique) the major soybean yield gap contributors are: variety (63.9%), seed rate (49.7%), and disease damage (36.3%), especially soybean rust. An indication that through yield gap decomposition, interventions could be prioritized to target the most yield-limiting factors with the minimum resources available to smallholder farmers and immensely narrow the yield gap.
ISSN:2731-9202
2731-9202
DOI:10.1038/s44264-024-00039-9