Table 4 Data available^* as Open Access Datasets in e-RA, September 2017 http://www.era.rothamsted.ac.uk/open_access

Broadbalk: winter wheat since autumn 1843: wheat in rotation with other crops since 1968

 Broadbalk Yields^{(Data Citation 1)}

Mean long-term wheat yields from selected treatments

Continuous wheat: 1852–2016 Wheat in rotation: 1968–2016

Widely used to demonstrate effects of FYM and fertilizers, improved cultivars and pest control on yield

 Broadbalk soil organic carbon (SOC)^{(Data Citation 2)}

Long-term changes in SOC in topsoil (0-23 cm) from selected treatments

Continuous wheat sections only: 1843–2010

Includes % SOC, measured soil weights and calculated SOC, tha⁻¹

 Broadbalk soil Olsen P concentration^{(Data Citation 3)}

Long-term changes in Olsen P in topsoil (0–23 cm)

1843–2010, selected treatments

A measure of plant-available P

Hoosfield: spring barley since 1852

 Hoosfield Yields^{(Data Citation 4)}

Mean long-term barley yields from selected treatments

1852–2015

Shows long-term changes in yield due to improved cultivars, pest control, FYM and fertilizers.

 Hoosfield SOC^{(Data Citation 5)}

Long-term changes in SOC in topsoil (0-23cm) from selected treatments

1852–1998

Includes % SOC, measured soil weights and calculated SOC, tha⁻¹

Park Grass: permanent grassland since 1856, usually cut twice a year

 Park Grass species diversity^{(Data Citation 6)}

Effect of selected fertilizer treatments, with and without chalk, on number of species

1864–2011

Number of species comprising 1% or more of the above-ground biomass.

 Park Grass soil pH^{(Data Citation 7)}

Long-term changes in soil pH (in water) from selected treatments

1856–2011

Shows acidification of soil due to fertilizer use and atmospheric deposition, and effect of liming

Wilderness sites: two contrasting former arable sites which reverted to woodland in the 1880s

 Broadbalk Wilderness accumulation of organic carbon in soil and trees^{(Data Citation 8)}

Accumulation of biomass on a calcareous soil left to revert to woodland since 1882

Broadbalk Wilderness: 1881–1999.

Data on t C ha⁻¹ accumulated in soil, litter, root and above-ground biomass (trees)

 Geescroft Wilderness accumulation of organic carbon in soil and trees^{(Data Citation 9)}

Accumulation of biomass on an acidic soil left to revert to woodland since 1883

Geescroft Wilderness: 1883–1999.

Data on t C ha⁻¹ accumulated in soil, litter, root and above-ground biomass (trees)

Rothamsted meteorological data

 Mean annual temperature at Rothamsted^{(Data Citation 10)}

Mean annual air temperature and five-year mean.

1878–2013

The mean annual temperature is now 1 °C higher than the 1878–1987 average.