Relearning Research Methods

By Ric Coe, Director, Specialist in Research Methods, Statistics for Sustainable Development

Generations of agricultural scientists have been taught the same research methods. While novel questions will sometimes need novel methods, the basic tools have been established for a long time. Think of field experiments, for example. The principles of good (valid, efficient) experiments were written down by Fisher nearly 100 years ago1 and a large part of what we know of the science of agriculture has been discovered using those methods—they work!

It’s hardly surprising, then, that many agricultural scientists struggle to reconcile their training with the adaptations that new ways of working with farmers demand. But that doesn’t mean change isn’t necessary or valuable. Our research methods are only useful insofar as they meet the objectives of a given study. As the role of farmers in research expands, and objectives evolve, so too should our willingness as researchers to relearn research methods.

On-farm experimentation has been part of agricultural development with smallholders for a long time,2 but the emergence of movements like farmer research networks (FRNs) brings new dimensions to the practice. These networks blend everyday learning, research and science, and social exchange and networking. Farmers and researchers collaborate to explore the potential of farmer-centered research to transform food systems, improve livelihoods, build climate resilience and even reimagine research.

In my own work with FRNs in East Africa, it’s common to hear from researchers that participatory on-farm experiments are not effective. They claim that there is often a lot of variation in what farmers do, sometimes the treatments they want to compare are not “right,” random allocation of treatments may be difficult, and so on. In other words, researchers often feel that farmers’ experiments fail to follow well known principles for good experimentation—and we need to do something about that.

One response is to teach farmers more about the principles of experimentation. Some years ago we put together this simple list of principles and explanations, which some FRNs have found useful.

But there is another response that is more important. Established principles for experimental design are based on a frame of reference within which sit the objectives of the experiment. The researcher’s assumption is that there is a true, fixed ‘treatment effect’ and the aim of the experiment is to estimate that as precisely as possible. If that really is the aim, then an experiment that follows Fisher’s principles is what you need. But that is usually not the context and aim of experiments done by farmers within an FRN.

Consider an example such as this one from Malawi: farmers are used to intercropping maize and a legume (such as groundnut or pigeonpea). The idea came up that it might be preferable to mix two different legumes (such as groundnut and pigeonpea) in the intercrop, so the FRN set out to do experiments to compare the use of single and doubled-up legumes. Farmers know that there is not a single effect of the difference between these practices, but it will probably depend on several other factors such as soil type and its health, whether it is a drier or wetter season, whether crops were planted early or late, perhaps the state of weeds in the field.

Here, the objectives become more complex and include gaining insights into the conditions when such doubled-up legumes are or are not a good idea. In this case the variation between farms, rather than being a source of “noise” to be eliminated, can be a source of information that can reveal or suggest reasons for some of the complexity. The old principle of ‘controlling variation’ no longer looks so obviously sensible.

Another common complaint about farmers’ experiments is that treatments are not always identical across all farms. That can happen for several different reasons. For example, an experiment is set up to compare a new practice with current practice. That sounds easy. But what if the ‘current practice’ is different on different farms?

The classical researcher’s approach is to choose a single standard with which to compare the new practice—sometimes the most common practice, sometimes the recommended practice (even if that is not what farmer use). However, if we think of the experiment as providing information for the participating farmers, comparing the new practice with their own individual current practice makes sense to farmers because it is most relevant to their own decision making. The collective information from the trial then includes data on the percentage of farmers who found the new practice better than their current, and perhaps allows identification of who those farmers are and in what way it was ‘better’.

The common pattern here is that the aims of participatory on-farm experiments are likely to be different from the aims of an experiment a researcher would do on their own. That means the appropriate design and methods also need to be different, with the standard tools perhaps not being useful and the principles on which they are based needing updating.

The implication is that researchers working in these collaborative networks may need to relearn research methods. Rather than assuming that “farmers can’t do experiments” or that they need to learn “our“ methods, we must take a careful look at the aims of research and the principles and procedures that will meet those aims.

Researchers will often need to think carefully about why they do things the way they do, and how that can be aligned with the reality of research by an FRN. This relearning is not easy. Despite research being about innovation and discovery, it can be a conservative process with inertia imposed by teaching curricula, standard practices in research organizations, or the expectations of science publishers. If collaborative networks like FRNs are to have a fruitful relationship with science, then researchers need to adapt their concepts of what good research looks like.


Notes:

  1. R.A. Fisher, Statistical Methods for Research Workers (Edinburg: Oliver and Boyd, 1925).
  2.  J.A. Ashby, Evaluating Technology with Farmers: A Handbook (Cali, Colombia: CIAT, 1990).

Date:

10/24/2021

Resource Type:

Learning / story

Community of Practice:

Farmer research network (FRN)