Cassava (Manihot esculenta Crantz) is a staple food crop in Nigeria, but root yields hardly exceed 10 t ha⁻¹. Intensification of small holders’ cassava production is key to improved food security and income generation. We tested, in two demonstration trials and 20 on‐farm trials, different intensification options: cassava growth type (erect and branching), fertilizer application (with and without), and cassava − legume arrangement (0.5 by 2 m/1 by 1 m spacing of cassava) in demonstration trials. In on‐farm trials, farmers tested a subset of these treatments. The demonstration trials had median cassava yields of about 20 (Akindele village) and 15 (Osunwoyin village) t ha⁻¹. Fertilizer application increased the yield of the erect cassava variety. Cassava intercropped with cowpea [Vigna unguiculata (L.) Walp.], reduced yield and the branching cassava variety produced lower yield than the erect variety. Median cowpea yields were about 1 and 1.5 t ha⁻¹ pod yield. Median yields in the on‐farm trials were about 10 t ha⁻¹. Intercropping with cowpea reduced cassava root yields (on average by 2.4 t ha⁻¹), again, cowpea pod yields of 1−1.5 t ha⁻¹ were attainable. In summary, this study confirmed that intensification measures need to be site and user or farmer specific.

中文翻译：

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尼日利亚西南部小农木薯生产的集约化选择

木薯（Manihot esculenta Crantz）是尼日利亚的主食作物，但根系产量几乎不超过10 t ha ^-1。小农木薯生产的集约化是改善粮食安全和创收的关键。我们在两个示范试验和20个农场试验中测试了不同的集约化方案：木薯生长类型（竖立和分支），施肥（有无）和木薯-豆科植物布置（0.5 x 2 m / 1 x 1 m示范试验中的木薯间距）。在农场试验中，农民测试了其中一部分治疗方法。示范试验的木薯中产值约为20 t（akkindele村）和15 t（Osunwoyin村）t ha ^-1。施肥增加了直立木薯品种的产量。木薯与cow豆间作[ Vigna unguiculata（L.）Walp。]，产量降低，而分支木薯品种的产量低于直立品种。cow豆的中位数产量约为1和1.5 t ha ^-1豆荚产量。农场试验的中位数产量约为10 t ha ^-1。间作与豆间作可降低木薯根的产量（平均降低2.4 t ha ^-1），再次，cow豆荚的产量可达到1-1.5 t ha ^-1。总而言之，这项研究证实，集约化措施必须针对具体地点和用户或农民。