Cite this dataset as
Kirby, K.J.; Smart, S.M.; Black, H.I.J.; Bunce, R.G.H.; Corney, P.M.; Smithers, R.J.; Shaw, M.W. (2013). Woodlands survey soil data 1971-2001. NERC Environmental Information Data Centre. https://doi.org/10.5285/fb1e474d-456b-42a9-9a10-a02c35af10d2
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This dataset is made available under the terms of the Open Government Licence 
The dataset consists of pH, Loss on ignition (Soil organic matter) measurements and soil group information taken from soil samples from plots in 103 woodland sites surveyed across Great Britain in 1971 and again over the growing seasons of 2000, 2002 and 2003 (referred to as '2001 survey'), using exactly the same field methods. Data were collected under projects managed by The Nature Conservancy (in 1971) and the Centre for Ecology and Hydrology (in 2001).
Publication date: 2013-12-10
This dataset is part of the following
Data were collected on paper from 103 woodlands by field surveyors employed by The Nature Conservancy, Merlewood Research Station, Cumbria (in 1971) and employed under a project managed by the Centre for Ecology and Hydrology (in 2000-2003). Extensive training was undertaken by surveyors. Collected data were double punched into spreadsheets as a form of quality control before being compiled into a database. Data collected are available as four separate datasets: flora data, soil data, tree diameter data and site details.
https://orcid.org/0000-0003-2750-7832