Soil chemistry measurements from the Kew Wakehurst Ecosystem Observatory, UK, 2021-2024 - Barber, R.A.; Wilkes, P.; Underwood, B.C.; Clarkson, J.J.; Egan, G.; Cooper, A.N.; Wilkinson, T.; Lee, M.A.; Openshaw, I.; Castro, G.; Howell, L.E.; Roberts, R.J.B.; et al. (NERC EDS Environmental Information Data Centre, 2026)