Osvaldo Ryohei Kato published one of the first Doctoral Theses at ZEF. His research on “Fire-free Land Preparation as an Alternative to Slash-and-burn Agriculture in the Bragantina Region, Eastern Amazon: Crop Performance and Nitrogen Dynamics” is still available online. Kato started working with Embrapa in Brazil and continued to work with ZEF, e.g. on one of the first ZEF-based projects, “Secondary Forests and Fallow Vegetation in the Agricultural Landscape of the Eastern Amazon Region, Brazil“, which was funded by the German Federal Ministry of Education and Research (BMBF).
![](https://zef25years.de/wp-content/uploads/2024/05/First_Doc-thesis_n.png)
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