This map shows the geographic impact of U.D. Perdok'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 U.D. Perdok with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites U.D. Perdok more than expected).
This network shows the impact of papers produced by U.D. Perdok. 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 U.D. Perdok. The network helps show where U.D. Perdok may publish in the future.
Co-authorship network of co-authors of U.D. Perdok
This figure shows the co-authorship network connecting the top 25 collaborators of U.D. Perdok.
A scholar is included among the top collaborators of U.D. Perdok 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 U.D. Perdok. U.D. Perdok is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Wang, Xiaobin, et al.. (2005). Scenario analysis of tillage, residue and fertilization management effects on soil organic carbon dynamics. Pedosphere. 15(4). 473–483.10 indexed citations
5.
Wang, Xiaobin, et al.. (2005). Nutrient dynamics in a dryland corn cropping system in Northern China : Effects of crop residue, animal manure and NP fertilizer applications. Socio-Environmental Systems Modeling. 1066–1067.1 indexed citations
Lu, Zhaoxin, et al.. (2004). Analysis of tillage soil surface roughness. Transactions of the Chinese Society of Agricultural Machinery. 35(1). 112–116.3 indexed citations
Hoogmoed, W.B., et al.. (2003). Tillage and residue effects on rainfed wheat and corn production in the Semi-Arid Regions of Northern China. Socio-Environmental Systems Modeling. 1354–1359.2 indexed citations
Perdok, U.D. & B. Kroesbergen. (1999). Cone index as function of soil moisture and pore volume. Socio-Environmental Systems Modeling. 5–12.2 indexed citations
Perdok, U.D. & B. Kroesbergen. (1996). Compressibility and workability of soils under uni-axial load as influenced by air volume and water content.. Socio-Environmental Systems Modeling. 66–72.1 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.