Dr. Cliff Johnston

Professor

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Biography

Cliff Johnston is a Professor in the Department of Earth, Atmospheric, and Planetary Sciences at Purdue University. He has a strong background in soil chemistry and mineralogy, having obtained a PhD in Soil Chemistry from the University of California, Riverside, in 1983. His extensive research work includes notable contributions in the field of environmental science, particularly focusing on the interaction of biological molecules with clay minerals and the effects of land use on soil organic matter chemistry. Over the years, Johnston has collaborated on various scholarly publications addressing critical issues such as soil chemistry and the thermodynamic mechanisms involved in sorption processes. His expertise is not only recognized in academia but also through various professional honors, such as the Fulbright Fellowship awarded in 2008 and being named the Andrew Main Lecturer in 2015. He has served on several editorial boards and committees within the field and continues to advance the understanding of soil dynamics in relation to environmental changes.

Research Interests

Experience

Postdoctoral Fellow

1983-01-01 — 1985-01-01

Los Alamos National Laboratory • Los Alamos, NM

Conducted research in Isotope Nuclear Chemistry.

Courses

EAPS 591/AGRY 598 Terrestrial Biogeochemistry EAPS 113/NRES 290 Introduction Environmental Science AGRY 540 Soil Chemistry

Requirements for Purdue University

Master Program
Requirements
GPA Requirement
Required:3.5
TOEFL
Listening
Required:22
Reading
Required:22
Writing
Required:22
Speaking
Required:22
Total
Required:100
IELTS
Listening
Required:7
Reading
Required:7
Writing
Required:7
Speaking
Required:7
Overall
Required:7.5
Duolingo
Overall Score
Required:135
Overall
Required:135
Prerequisites
Bachelor's degree in CS or related field Foundational concepts of computer science Data structures Computer architecture Operating systems Mathematics through differential equations Linear and matrix algebra
Application Checklist
  • Official Transcripts
  • Academic Statement of Purpose
  • Personal History Statement
  • Resume
  • Three Letters of Recommendation
  • CS Supplementary Form
Specialization Notes

GRE is not required.