Here an interview with Norman Borlaug, the father of the Green Revolution and winner of the 1970 Nobel Peace Price. He sees bio-technology as a promising field in helping Africa increase production and productivity, and sees roads as one of the growth constraints in Africa.
...Biotech has a big potential in Africa, not immediately, but down the road. Five to eight years from now, parts of it will play a role there. Take the case of maize with the gene that controls the tolerance level for the weed killer Roundup. Roundup kills all the weeds, but it's short-lived, so it doesn't have any residual effect, and from that standpoint it's safe for people and the environment. The gene for herbicide tolerance is built into the crop variety, so that when a farmer sprays he kills only weeds but not the crops. Roundup Ready soybeans and corn are being very widely used in the U.S. and Argentina. At this stage, we haven't used varieties with the tolerance for Roundup or any other weed killer [in Africa], but it will have a role to play.
Roundup Ready crops could be used in zero-tillage cultivation in African countries. In zero tillage, you leave the straw, the rice, the wheat if it's at high elevation, or most of the corn stock, remove only what's needed for animal feed, and plant directly [without plowing], because this will cut down erosion. Central African farmers don't have any animal power, because sleeping sickness kills all the animals--cattle, the horses, the burros and the mules. So draft animals don't exist, and farming is all by hand and the hand tools are hoes and machetes. Such hand tools are not very effective against the aggressive tropical grasses that typically invade farm fields. Some of those grasses have sharp spines on them, and they're not very edible. They invade the cornfields, and it gets so bad that farmers must abandon the fields for a while, move on, and clear some more forest. That's the way it's been going on for centuries, slash-and-burn farming. But with this kind of weed killer, Roundup, you can clear the fields of these invasive grasses and plant directly if you have the herbicide-tolerance gene in the crop plants.
...Supplying food to sub-Saharan African countries is made very complex because of a lack of infrastructure. For example, you bring fertilizer into a country like Ethiopia, and the cost of transporting the fertilizer up the mountain a few hundred miles to Addis Ababa doubles its cost. All through sub-Saharan Africa, the lack of roads is one of the biggest obstacles to development--and not just from the standpoint of moving agricultural inputs in and moving increased grain production to the cities. That's part of it, but I think roads also have great indirect value. If a road is built going across tribal groups and some beat-up old bus starts moving, in seven or eight years you'll hear people say, "You know, that tribe over there, they aren't so different from us after all, are they?"
And once there's a road and some vehicles moving along it, then you can build schools near a road. You go into the bush and you can get parents to build a school from local materials, but you can't get a teacher to come in because she or he will say, "Look, I spent six, eight years preparing myself to be a teacher. Now you want me to go back there in the bush? I won't be able to come out and see my family or friends for eight, nine months. No, I'm not going." The lack of roads in Africa greatly hinders agriculture, education, and development.