Highlights • On MPN assessment, native rhizobium population size on the study site was less than 10 cfu g−1 of soil.• On a wide range of on-farm trials, inoculation (I) increased chickpea grain yields for 99% of target farmers.• I and P fertilizer in combination, resulted on average, in a 38% yield increase over the control plots.• Variation in response to rhizobium inoculation was mostly independent of agro-ecology and soil type.• Rhizobial inoculation offers a cheap and highly effective means for the sustainable intensification of smallholder agriculture.

中文翻译：

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埃塞俄比亚小农场鹰嘴豆（Cicer arietinum L.）对根瘤菌接种和磷肥的附加产量响应

亮点 • 在 MPN 评估中，研究地点的原生根瘤菌种群规模小于 10 cfu g−1 土壤。• 在广泛的农场试验中，接种 (I) 提高了 99% 目标农民的鹰嘴豆籽粒产量.• 施用 I 和 P 肥料，平均而言，与对照地块相比，产量增加了 38%。• 根瘤菌接种反应的变化主要与农业生态和土壤类型无关。• 根瘤菌接种提供了一种廉价且高度小农农业可持续集约化的有效手段。