Using a stepwise approach that combines several econometric methods, we assessed whether or not the adoption of modern seeds and the use of manure in cereal‐based systems are linked and, if so, what are the driving forces of the linkages between these two agricultural technologies under dry‐climate conditions in West Africa. We found complementary and substitutability linkages arising from jointness and endogeneity between the two technologies. Specifically, our findings reveal positive joint determination along with negative endogeneity between the two technologies indicating that, controlling for observable variables, both technologies are positively linked, but unobserved factors that affect one adoption decision are negatively correlated with the other. After controlling for jointness and endogeneity, we found significant complementarity linkages showing a significant positive effect of manure use on the adoption of modern seeds, which is also significantly and positively affected by the number of cash crops grown and remittances. The two technologies are reversely affected by schooling and the incidence of soil fertility problems within the farm, whereas the amount of healthy land has a positive effect on both. The study suggests that organic fertilizer can serve as an enabling factor for greater adoption of modern seeds, especially in less favourable climate areas, and strongly supports the argument behind the need to breed seeds suitable for the use of organic fertilizers. These findings provide avenues for re‐orientation of policies that promote the use of modern seeds in dryland areas in sub‐Saharan Africa, with a possibility of breeding and promoting them in packages with organic fertilizers to upscale their adoption.

中文翻译：

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西非旱地谷物系统中现代种子的肥料和采用：联系和（非）互补

使用结合多种计量经济学方法的逐步方法，我们评估了现代种子的采用和谷物系统中粪便的使用是否相关，如果是，这两种农业技术之间的联系的驱动力是什么？在西非干旱气候条件下。我们发现两种技术之间的联合性和内生性产生了互补性和可替代性的联系。具体而言，我们的研究结果揭示了两种技术之间的正联合决定以及负内生性，表明在控制可观察变量的情况下，两种技术是正相关的，但影响一个采用决策的未观察因素与另一个负相关。在控制了联合性和内生性之后，我们发现了显着的互补联系，表明使用粪肥对采用现代种子有显着的积极影响，这也受到经济作物种植数量和汇款数量的显着积极影响。这两种技术受到学校教育和农场内土壤肥力问题发生率的反向影响，而健康土地的数量对两者都有积极影响。该研究表明，有机肥料可以成为更多采用现代种子的有利因素，尤其是在气候欠佳的地区，并强烈支持需要培育适合使用有机肥料的种子的论点。这些发现为重新定位促进在撒哈拉以南非洲旱地地区使用现代种子的政策提供了途径，