Dr. Alexander Hristov

Professor

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Biography

Alexander N. Hristov is a distinguished professor in the Department of Animal Science at Pennsylvania State University, specializing in dairy nutrition. He has a substantial background in advanced dairy management, rumen fermentation, and methane mitigation strategies. Hristov's research focuses on understanding nitrogen utilization and improving dairy production systems to reduce methane emissions from livestock. He holds a Ph.D. from the Academy of Agricultural Sciences in Sofia, Bulgaria, and has over 200 peer-reviewed publications, including books, journal articles, and various research contributions to the field. Hristov also serves on several editorial boards and committees, has been a visiting scientist for multiple prestigious organizations, and actively contributes to global initiatives aimed at sustainable agriculture. His work has earned him numerous accolades and recognition within the agricultural science community, specifically through his innovative approaches to animal nutrition and environmental sustainability.

Research Interests

Experience

Distinguished Professor

2019-01-01 — Present

Penn State University, Department of Animal Science • University Park, PA

Hristov has been serving as a distinguished professor specializing in dairy nutrition.

Professor

2013-01-01 — 2019-01-01

Penn State University, Department of Animal Science • University Park, PA

Taught and engaged in research regarding dairy nutrition.

Associate Professor

2008-01-01 — 2013-01-01

Penn State University, Department of Animal Science • University Park, PA

Focused on research and teaching in dairy nutrition.

Associate Professor

1999-01-01 — 2008-01-01

University of Idaho, Department of Animal and Veterinary Science • Moscow, ID

Conducted research on dairy nutrition and mentoring students.

Research Scientist II

1997-01-01 — 1999-01-01

Agriculture Canada, Lethbridge Research Centre • Lethbridge, AB, Canada

Managed research programs focused on dairy science.

Visiting Scientist

1995-01-01 — 1997-01-01

Agriculture Canada, Lethbridge Research Centre • Lethbridge, AB, Canada

Collaborated on research initiatives in dairy fermentation.

Visiting Scientist

1990-01-01 — 1991-01-01

Dairy Forage Research Center • Madison, WI

Engaged in various research projects related to dairy production.

Research Scientist

1983-01-01 — 1997-01-01

Institute of Animal Sciences • Kostinbrod, Bulgaria

Conducted research on animal nutrition.

Requirements for Pennsylvania State University

Doctorate Program
Requirements
GPA Requirement
Required:3
TOEFL
Writing
Required:24
Speaking
Required:23
Total
Required:100
IELTS
Writing
Required:7
Speaking
Required:7
Overall
Required:7
GRE General
Prerequisites
Master's degree in related field for PhD Baccalaureate degree from accredited institution
Application Checklist
  • Three letters of recommendation
  • Statement of Purpose
  • Writing Sample
  • Official Transcripts
  • Resume/CV
Specialization Notes

GRE scores are highly recommended but not strictly required for Applied Linguistics.