Peter van Straaten and the Rocks for Crops multi-cultural collaboration with Lombok University, Indonesia.   Dr. Peter van Straaten spoke at the III Brazilian Rochagem Congress in November 2016 (which we have previously featured in a series of articles: Part 1, Part 2, and Part 3). In his presentation, which was based on the article reprinted below, he challenged the audience to not only include geologists, soil scientists and agronomists in agrogeological research and development but also include farmers as equal stakeholders. Farmers are important as they can direct our efforts to a practical and sustainable ‘down to earth’ approach, so ...