Johnston, A.E. , Poulton, P.R. , White, R.P. and Macdonald, A.J.(2016) "Determining the longer term decline in plant-available soil phosphorus from short-term measured values", Soil Use and Management, 32, 151-161 DOI: 10.1111/sum.12253
2013
Poulton, P.R. , Johnston, A.E. and White, R.P.(2013) "Plant-available soil phosphorus. Part I: the response of winter wheat and spring barley to Olsen P on a silty clay loam", Soil Use and Management, 29, 4-11 DOI: 10.1111/j.1475-2743.2012.00450.x
Rothamsted(1991) "Guide to the Classical Field Experiments", Rothamsted Experimental Station, Lawes Agricultural Trust, Harpenden UK , , DOI: 10.23637/ERADOC-1-189
1980
Avery, B.W.(1980) "Soil classification for England and Wales (higher categories). ", Technical Monograph 14, Soil Survey of England and Wales, Harpenden UK , ,
1977
Johnston, A.E. and Poulton, P.R.(1977) "Yields on the Exhaustion Land and changes in NPK content of the soils due to cropping and manuring, 1852-1975", Rothamsted Experimental Station Annual Report for 1976 , Part 2 , 53-85 Get from eRAdoc: ResReport1976p2-55-87
For further information and assistance, please contact the e-RA
curators, Sarah Perryman and Margaret Glendining using the e-RA email
address: era@rothamsted.ac.uk