Sorry to be so late responding to this. My apologies.
Bello wrote in a letter to Tuareg Shaykh Muhammad al-Jailani that “The concern of the sharia to promote community life is well known. Due to this the jurists have ruled that it is lawful to transfer a foundling from the desert to the village and from the latter to the town, but not the opposite.” (This is quoted from H.T. Norris _The Tuareg_ and is also discussed in Mervyn Hiskett’s survey _The Development of Islam in West Africa_). Bello also wrote to Emir Yakubu of Bauchi that Fulani herders living among pagans should be brought into settlements even if that meant they had to give up their herds and abandon their grazing grounds. That’s cited in M.M. Tukur’s Ph.D. dissertation at ABU, “Values and Public Affairs”. I discuss this in my book about Bello’s ribat policy linked in my sig file below.
When doing this research I found that Bello’s policy to settle Fulani was well known among many, but it was not followed by his uncle Abbdullahi in the section of the Caliphate he ruled. Bello is perhaps responsible for creating this hybrid “Hausa Fulani” culture of Hausacized descendants of Fulani, although settlement and acculturation was probably going on before his time, at least in the scholarly clans that produced the Fodiawa and other Fulani royal clans of Hausaland.
Interesting that you should mention _Infaq al-Maysur_, BTW, where Bello quotes ibn Khaldun. The obvious question to me is whether Bello had read ibn Khaldun’s theories of nomad interactions with settled peoples and whether or not that was part of the reason he wanted to settle them down. We know he read some of ibn Khaldun’s writings, but we don’t know how many and what influence those writings had on him.