Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
The Contribution of Commercial Fertilizer Nutrients to Food Production
Countries citing papers authored by A. E. Johnston
Since
Specialization
Citations
This map shows the geographic impact of A. E. Johnston's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by A. E. Johnston with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites A. E. Johnston more than expected).
This network shows the impact of papers produced by A. E. Johnston. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by A. E. Johnston. The network helps show where A. E. Johnston may publish in the future.
Co-authorship network of co-authors of A. E. Johnston
This figure shows the co-authorship network connecting the top 25 collaborators of A. E. Johnston.
A scholar is included among the top collaborators of A. E. Johnston based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with A. E. Johnston. A. E. Johnston is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Johnston, A. E. & P. R. Poulton. (2014). Changing concepts for the efficient use of phosphorus in agriculture. Rothamsted Repository (Rothamsted Repository).3 indexed citations
Johnston, A. E., et al.. (2004). Phosphorus and crop nutrition: principles and practice. Rothamsted Repository (Rothamsted Repository).2 indexed citations
7.
Johnston, A. E.. (2003). Understanding potassium and its use in agriculture. Rothamsted Repository (Rothamsted Repository).25 indexed citations
8.
Kafkafi, U., et al.. (2002). Potassium and chloride in crops and soils: the role of potassium chloride fertilizer in crop nutrition (IPI Research Topics No. 22). Rothamsted Repository (Rothamsted Repository).7 indexed citations
9.
Johnston, A. E., et al.. (2002). Understanding phosphorus and its use in agriculture. Rothamsted Repository (Rothamsted Repository).32 indexed citations
10.
Johnston, A. E.. (2000). Some aspects of nitrogen use efficiency in arable agriculture. Rothamsted Repository (Rothamsted Repository).4 indexed citations
11.
Poulton, P. R. & A. E. Johnston. (1996). The long-term effect of ley-arable cropping on soil organic matter and crop yield. Rothamsted Repository (Rothamsted Repository).
12.
Cassman, Kenneth G. & A. E. Johnston. (1995). Long-term experiments and productivity indexes to evaluate the sustainability of cropping systems. Rothamsted Repository (Rothamsted Repository).10 indexed citations
13.
Johnston, A. E.. (1995). The significance of long-term experiments to agricultural research. Rothamsted Repository (Rothamsted Repository).2 indexed citations
14.
Powlson, D. S. & A. E. Johnston. (1994). Long-term field experiments: their importance in understanding sustainable land use. Rothamsted Repository (Rothamsted Repository).32 indexed citations
15.
Johnston, A. E.. (1991). Potential changes in soil fertility from arable farming including organic systems. Rothamsted Repository (Rothamsted Repository).5 indexed citations
Johnston, A. E.. (1971). Potassium residues in soils from experiments at Rothamsted and Woburn. Rothamsted Repository (Rothamsted Repository).3 indexed citations
18.
Johnston, A. E., et al.. (1965). Notes on the use of soil analysis for estimating available P in Rothamsted soils. Rothamsted Repository (Rothamsted Repository).1 indexed citations
19.
Johnston, A. E., et al.. (1965). Changes in the Park Grass experiment. Rothamsted Repository (Rothamsted Repository).5 indexed citations
20.
Johnston, A. E., et al.. (1964). The Park Grass Experiment. Rothamsted Repository (Rothamsted Repository).50 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.