1997-11-19 Principles for increasing organic matter in order to increase soil fertility. Little by little, work in a dozen countries has convinced us that the vast majority of soils can be made highly fertile. How? By using our first principle:maximize organic matter production.
2006-10-20 Development is a) a process of people learning to solve their own problems, b) sustainably. It means progressing from one problem to another. Agricultural development is possible in more ways and climates than people often think.