We first understood, for example, that the conventional approaches to tillage were not suitable in all soil types. It depended on the soil type, depended on the slope. Fall ploughing with the mouldboard plough was the traditional way these things were done. It left acres exposed, and the areas were free to run off and contribute sediment into the local watercourse, destroy habitat, and move downstream. Of course it also represented a loss of nutrients.
As farming became more intense...because again, 40 years ago there was more livestock and there was more pasturing. You have crop rotations. When you move to a system where you have a corn and beans rotation, you basically have the soil exposed for nine months of the year outside of the growing season. You need to adopt other measures, such as conservation tillage where you leave the plant residue on the surface to help break up the impact of rain and reduce runoff. It also adds tilth to the soil and improves the soil structure.
Of course, farmers are innovators, and new technologies come along. It's a very competitive industry. Their weather-dependent economic margins being what they are, they have to adapt. They have to adapt very carefully to new production techniques. They need basically to understand, I think, how what they are doing impacts or doesn't impact the environment.
It's very much something where farmers need to learn from one another. You need the ability to sort of transfer what you learn in one landscape, in one soil type, in one production technique, to other areas.