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1. Geescroft Wilderness, Long Term Soil Organic Matter Study [IACR.Geescroft]
This study began in 1885. The area is naturally regenerated woodland since 1885. Map of 1623 shows the field as arable. Arable crops were also present 1847-78. The field was left fallow 1879-82. ...

2. Morrow Plots, Long Term Agriculutral Experiment, Illinois [UI.Morrow]
The exact origin of the Morrow plots on the campus of the University of Illinois is obscure, but they are reputed to be the oldest continuous agronomic research study in the USA. Some evidence indicates ...

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