The rainy season is the best time to grow rice and corn in Borno, one of Nigeria's agricultural regions. But farmers are frequently targeted by Boko Haram attacks. In a bid to improve security in the region and reassure farmers, teams of so-called "Agro Rangers" were set up a year ago by authorities. The men, who are often volunteer militia or hunters, are recruited by the Nigerian civil defence. Our correspondent Moïse Gomis went on patrol with them on the outskirts of Maiduguri and elsewhere in Borno.