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 spread of Conservation Agriculture: justification, sustainability and uptake
2009605 citationsAmir Kassam, Theodor Friedrich et al.International Journal of Agricultural Sustainabilityprofile →
Current status of adoption of no-till farming in the world and some of its main benefits.
2010532 citationsRolf Derpsch, Theodor Friedrich et al.International journal of agricultural and biological engineeringprofile →
Global spread of Conservation Agriculture
2018496 citationsAmir Kassam, Theodor Friedrich et al.International Journal of Environmental Studiesprofile →
Peers — A (Enhanced Table)
Peers by citation overlap · career bar shows stage (early→late)
cites ·
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Countries citing papers authored by Theodor Friedrich
Since
Specialization
Citations
This map shows the geographic impact of Theodor Friedrich'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 Theodor Friedrich with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Theodor Friedrich more than expected).
Fields of papers citing papers by Theodor Friedrich
This network shows the impact of papers produced by Theodor Friedrich. 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 Theodor Friedrich. The network helps show where Theodor Friedrich may publish in the future.
Co-authorship network of co-authors of Theodor Friedrich
This figure shows the co-authorship network connecting the top 25 collaborators of Theodor Friedrich.
A scholar is included among the top collaborators of Theodor Friedrich 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 Theodor Friedrich. Theodor Friedrich is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Kassam, Amir, Theodor Friedrich, & Rolf Derpsch. (2018). Global spread of Conservation Agriculture. International Journal of Environmental Studies. 76(1). 29–51.496 indexed citations breakdown →
Kassam, Amir, Theodor Friedrich, Rolf Derpsch, & J. Kienzle. (2015). Overview of the Worldwide Spread of Conservation Agriculture. SHILAP Revista de lepidopterología.149 indexed citations
6.
Friedrich, Theodor. (2014). La seguridad alimentaria: retos actuales. Redalyc (Universidad Autónoma del Estado de México). 48(4). 319–322.10 indexed citations
Freitas, P. L. de, et al.. (2013). Effects of Zero Tillage (No-Till) Conservation Agriculture on soil physical and biological properties and their contributions to sustainability. Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT). 1–1.9 indexed citations
9.
Friedrich, Theodor. (2013). Producción de alimentos de origen animal. Actualidad y perspectivas. Redalyc (Universidad Autónoma del Estado de México). 21(1). 1–3.1 indexed citations
10.
Friedrich, Theodor, Rolf Derpsch, & Amir Kassam. (2012). Overview of the Global Spread of Conservation Agriculture. SHILAP Revista de lepidopterología.112 indexed citations
11.
Kassam, Amir & Theodor Friedrich. (2012). An ecologically sustainable approach to agricultural production intensification: Global perspectives and developments. SHILAP Revista de lepidopterología.11 indexed citations
12.
Friedrich, Theodor, et al.. (2012). Effect of Tillage Methods on Productivity of Winter Wheat in the Aral Sea Basin of Uzbekistan. 22(1). 255–258.2 indexed citations
13.
Friedrich, Theodor, et al.. (2012). Effect of Tillage Methods on Productivity of Winter Wheat in the Aral Sea Basin of Uzbekistan (THE 1st INTERNATIONAL CONFERENCE ON ARID LAND (ICAL 1) "DESERT TECHNOLOGY X (DT X)"). 22(1). 255–258.1 indexed citations
Derpsch, Rolf, Theodor Friedrich, Amir Kassam, & Hongwen Li. (2010). Current status of adoption of no-till farming in the world and some of its main benefits.. International journal of agricultural and biological engineering. 3(1). 1–25.532 indexed citations breakdown →
17.
Kassam, Amir & Theodor Friedrich. (2010). Conservation Agriculture: Concepts, worldwide experience, and lessons for success of CA-based systems in the semi-arid Mediterranean environments. 11–51.6 indexed citations
18.
Shaxson, Francis, Amir Kassam, Theodor Friedrich, & Adewale Adekunle. (2008). CONSERVATION AGRICULTURE: LOOKING BENEATH THE SURFACE 1.1 indexed citations
19.
Friedrich, Theodor, et al.. (2007). Proceedings of the international workshop on conservation agriculture for sustainable land management to improve the livelihood of people in dry areas, 7-9 May 2007.7 indexed citations
20.
Friedrich, Theodor, J. V. Cross, A. J. Gilbert, et al.. (2000). Pesticide application needs in developing countries.. Aspects of applied biology. 193–200.1 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.