Awareness–adoption gap for improved cassava varieties among smallholder farmers in Ogun State, Nigeria

Imagine the world of farming as a massive, bustling library where new, super-powered books (like seeds that grow bigger or resist disease) are constantly being published. For a long time, scientists and policymakers assumed that if they just put these books on the shelves, farmers would immediately grab them and start reading. But in reality, many farmers walk past the new books, sticking to their old, familiar stories. This gap between knowing a new tool exists and actually using it is a huge mystery in agricultural science. To solve it, researchers use a special kind of detective work called "endogenous switching." Think of this not as a simple list of who bought what, but as a way to understand that the decision to know about a new seed and the decision to plant it are two different steps, influenced by different parts of a farmer's life. If we don't separate these steps, we might blame the wrong things for why a new technology isn't spreading. Understanding this gap is crucial because without it, we can't help farmers feed their families or earn more money, leaving potential harvests rotting in the fields.

This study takes a deep dive into that mystery in Ogun State, Nigeria, focusing on the humble but mighty cassava plant. The researchers, led by Kazeem Aboaba and his team, wanted to know why there is such a big "awareness–adoption gap." They found that while 44% of the farmers they talked to knew about improved cassava varieties (like the super-seeds), only a tiny fraction actually planted them. Specifically, for the most popular improved variety, TME 419, 37% of farmers knew it existed, but only 18% had actually adopted it. It's like knowing a new video game is out and looking cool, but never buying a controller to play it.

The team used a clever statistical tool called the Endogenous Switching Poisson Regression (ESPR). You can think of this as a magic lens that separates farmers into two groups: those who are "aware" and those who are "unaware," and then looks at what happens next. They discovered that the reasons a farmer knows about a new seed are different from the reasons they actually plant it. For instance, being older made a farmer less likely to know about the new seeds, perhaps because they stick to what they've always done. However, once a farmer did know about the seeds, having a large family actually helped them decide to plant more of them, likely because they had more hands to help with the work.

The study also ruled out the idea that "knowing" is enough. It suggests that awareness is just the first door; you still need a key to walk through it. That key is often access to things like extension agents (farm experts who visit the fields), credit (money to buy the seeds), and the actual planting materials. The researchers found that if farmers were aware of the varieties, they would theoretically adopt about 72.4% more of them than they currently do. But because of missing keys like money or seeds, that potential stays locked away. The paper concludes that simply telling farmers "hey, there's a new seed!" isn't enough. To fix the gap, we need bundled strategies: better teachers (extension agents), easier access to money and seeds, and support for farmers to work together in groups. Without these extra steps, the new seeds will remain on the shelf, and the harvest won't reach its full potential.