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If you have questions contact Karen Clymer​.

D​eadlines for Applications

U.S. Resident

Semester Date
Fall April 15
Spring October 15
Summer April 15

International Applicants

Semester Date
Fall April 15
Spring September 15
Summer February 15
Your application package to the Department of Agronomy is complete once all the following information has been received.
(International Applicants) All official documents must be in English language, or they must be in the native language AND accompanied by an official translation.
  1. Graduate school application to Department of Agronomy.
  2. Privacy Act Release form.
  3. Official transcripts of grades from each college or university at which you matriculated, which are to be sent to Chairman, Graduate Committee by the Registrar(s) of the respective university or universities.
  4. Three letters of recommendation.
  5. Statement of Purpose.
  6. A nonrefundable fee of $60 for domestic applicants and $75 for international applicants (drawn on U.S. funds through a U.S. bank) is required for application for graduate study at Purdue University. It is University policy that no action be taken on your application until the fee is received. If you have a previous graduate record at Purdue, you are not required to pay an application fee.
  7. Graduate Record Examination (GRE) scores (test results should be requested from E.T.S. including both institution [R1631] and department [0104 ] codes).
  8. (​International Applicants) TOEFL (Test of English as a Foreign Language) scores if you are applying from abroad (A minimum TOEFL score of 550 will be required for admission to Purdue University Graduate School for all non-native speakers of English, effective for the fall semester of 1990. Test results [institution code 1631] should be requested to be sent from E.T.S. to Purdue University).
  9. (International Applicants) TWE (Test of Written English) scores if you are applying from abroad (A TWE score of five or above (scale: 1=low, 6=high) will be evidence of acceptable proficiency in English composition. Students who do not submit TWE scores with their application or students scoring less than five on the TWE will be referred by the Graduate School to the Office or Writing Review for further evaluation of their proficiency in English composition).
Once your completed application (including test scores) has been received by the Department of Agronomy, the departmental Graduate Committee will review and act on your application. Allow approximately two months, after your application is completed, for a decision on recommendation for admittance and availability of a graduate research assistantship.
More importantly, if you wish to be considered for an assistantship or fellowship, contact the faculty member with whom you are most interested in working. They will be able to tell you whether or not they have the funds to support you. If you will be independently supported, contact them anyway to get an idea of what they are working on and if they would be willing to work with you.

Degree Requirements

In the Department of Agronomy there are three graduate degree tracks most students take. A Masters non-thesis, Masters thesis and Doctoral degrees are all offered. Find out more about each degree below. 

Masters Requirements

Master’s Degree  -  Non-thesis
33 credit hours, including 1 hour seminar
3 credit hours, but not more than 6 credits of special problems GRAD 612 required
Total of 36-39 credit hours.
Master’s Degree - Thesis
24 credit hours. Must include 1 credit hour of GRAD 612
6 research credit hours
Total of 30 credit hours


Doctoral Degree Requirements

Current students who do not have an approved plan of study by the graduate school will have the option to follow the current requirments or be included int he new plan. Students who have an approved plan of study by the graduate school do not qualify for this option. Students entering in January 2011 can only follow the new credit hour requirement.
Doctoral Degree
27 course credits
9 departmental core credits
Total of 36 credit hours

*Six credit hours may be independent study, but not with the student’s major professor.  Students must have prior approval from the Agronomy Graduate Committee for independent study credits - provide objectives, syllabus and deliverables.  
Department Core Credit Hours
(3) Statistics (STAT 503 or 511, or equivalent)
(3) Statistics 512 (encouraged) or 514                          
(1) Ethics
(2) Seminar  
Total of 9 credit hours  
* The preliminary exam structure will remain the same, but will be reviewed by agronomy faculty in the future. There is no qualifying exam required.
* Students may take more than 36 credit hours as directed by their discipline or major professor, except if you are a plant breeding and genetics student.
Plant Breeding and Genetics Core Course Requirements and Preliminary Exam Structure
24 course credits minimum. This includes the 9 departmental core requirements and a minimum of 15 credits in plant breeding and genetics.
Competency-based preliminary exam at the end of the fifth semester.  

Core course requirements and preliminary exam structure for Doctoral students in the Department of Agronomy area of specialization    

PGB Track II                                                             
Faculty in PGB have the option to follow an alternate departmental path for graduate student training. Track II has reduced course requirements and an accelerated, competency-based preliminary exam to be taken by the end of the fifth semester.

Course Work

15 credits of core courses in PGB minimum (in addition to 9 credits of department core requirements)
24 cource credits minimum
Advanced Genetics and Breeding- 3 Credits
(3) AGRY605, Advanced Plant BreedingAGRY605, Advanced Plant Breeding                                                                               
(3) AGRY530, Advanced GeneticsAGRY530, Advanced Genetics
Plant Molecular and Cell Biology (at least one from the list below)- 3 Credits
Plant Cell biology, AGRY 598
Plant Growth and Development, BTNY 552
Molecular Plant Phys, HORT 551
Plant Molecular Biology, BIOL 550
Quantitative Genetics and Genomics (at least one from the list below)- 3 Credits 
Genomics, AGRY 600
Quant. Genetics, AGRY (M. Tuinstra)
Population Genetics, (B. Muir, AGRY 511)
QTL Analyses, (R. Doerge)
Others to be added.
Elective (at least one) - 3 Credits                                                                                    
Any 500+ level course, within or outside an area of concentration
Note: 300 and 400 level courses will not count toward the 24 credit hours required for the PhD. Course credits taken at other institutions for the MS degree, must be advanced graduate level courses to be accepted toward the 24 credit hours.
Areas of concentration in the PGB area
Competency areas:
  1. Statistics (mandatory for all Ph.D. students in the Department): ANOV (STAT 503/511 or equivalent) AND Regression (STAT 512 or equivalent) OR Experimental Design (STAT 514 or equivalent).
  2. Plant Breeding  AGRY 605, or equivalent.  Plant breeding methods and their applications, selection and experimentation with plant populations in field, greenhouse and controlled chamber conditions, analysis of qualitative and quantitative traits, integration of phenotyping and genotyping with molecular technologies, genetic mapping, genetic linkage, heritability, analysis of genetic gain from selection, heritability, analytic breeding, interspecific gene transfer and utilization. Demonstrate ability to develop, in form of research proposals, crop improvement and genetic research objectives and research plans.
  3. Plant Genetics AGRY 530 – to be renumbered as 630, STAT 512 or STAT 598 and BIOL598Z, or equivalents.  Strong fundamentals in both Mendelian, non-Mendelian inheritance, and molecular genetics. Students should have a full understanding of modern molecular genetics and have the ability to analyze mutants and genetic interactions. Knowledge of gene mapping through the construction and use of recombinant inbred lines and recombination-based mapping using molecular markers.  Know experimental techniques to determine cell autonomous vs. non-cell autonomous functions. Knowledge about plant reproduction, genetic imprinting, and epigenetic phenomenon.
  4. Genomics and Quantitative Genetics: (competency in subject areas similar to the content in AGRY 600 and Bioinformatics – STAT598B, BIOL595B, CHM599A).  Emphasis on genome structure and analysis, molecular methods for large-scale mapping of genes and genetic markers, and systems-level evaluation of phenotype and gene function.
  5. Quantitative Genetics ANSC/AGRY/FNR 511, ANSC/AGRY 611, or equivalents.  Quantitative genetics methods and tools, and their applications to breeding, genetics and evolution of plants--specifically in the analysis of changes in allele/gene frequencies in populations due to genetic drift, selection and mutation. Demonstrate ability to use, integrate and develop quantitative methodology in the development and analysis of complex genetic data sets.
  6. Plant Molecular and Cell Biology: Course work in modern plant molecular and developmental biology. Plant Growth and Development BTNY 520?, Plant Molecular Biology BIOL 550. Integration of molecular genetics to basic problems in plant growth and development. Additional courses in this area focus on plant science at the level of cellular compartmentalization of functions, protein trafficking, cell wall biogenesis, signal transduction (Plant Cell biology AGRY 598). Cell biology questions that scale to the physiology of tissues and organs are the topic of Molecular Plant Phys HORT 551.
The advisory committee for respective PhD students could (and likely will, in the interest of helping the student pass the preliminary exam) require additional courses, depending on the student’s primary area of interest (i.e., plant breeding, genetics, genomics), thesis research area, and prior courses taken.
Preliminary exam: a competency based exam that is used as the basis to admit a student into candidacy for a Ph.D.
Students must take their preliminary exam by the end of their 5th semester. Students who do not pass will have one additional attempt.  Students must have passed the preliminary exam by the end of the 6th semester or they will be removed from the program.
  1. Preliminary exam structure: A faculty representative of the PGB group will act as the exam coordinator. This individual will match student exam content with the appropriate faculty. The exam committee will be comprised of four individuals. Up to 2 can be from the student’s advisory committee, 2 will be from outside of the students advisory committee. All four will be content experts in areas of concentration that are suited to a particular student’s topic area. The student’s major professor can attend the preliminary exam, but only as a non-participating observer.
  2. Preliminary exam content: The exam will have a written and oral component. The exam will be centered on a research proposal that is distinct from the student’s thesis research in that the central hypothesis and specific aims of the proposal are not identical to the thesis project or any grant proposal to which the student has been given access. The preliminary exam coordinator will get written confirmation of this from the student’s major professor.
The proposal will have a background section, a well-defined knowledge gap, a central hypothesis, and specific aims that test the central hypothesis. The written exam will test the student’s ability to command key, current knowledge and develop a problem solving strategy to answer new questions. The exam coordinator and the exam committee will review an outline of the proposal addressing the points above, prior to holding the exam and, typically, before the student writes the proposal. If the proposal is deemed as not defendable the student will get feedback from the exam chair and then have a second and last attempt to submit a proposal.
The oral exam will test depth and breadth of knowledge in areas of concentration that are central to the PGB discipline area. Specific details of the proposal will also be examined during the oral session. Upon passing the preliminary exam the student will be admitted to candidacy. 

Core Science Requirements for Doctoral Students 

The Agronomy Department has a long-standing requirement for all students earning a Ph.D. in the department, to have a minimum level of coursework in each of the four basic areas of science: biology, chemistry, physics, and calculus.  This requirement is based in part on the belief that for a person to earn a doctorate in a scientific field such as ours, they should have a basic understanding of all the basic sciences.  The current requirements are also similar to what we require of our strong science majors (B.S. level) in our department.  These requirements help ensure that our students are well-grounded and well-rounded in science. 
The following core science and mathematics courses, or their equivalent, are required of all Ph.D. candidates.  Students deficient in these courses will be required to take them during their degree program.  These remedial courses may be taken for a letter grade (A, B, C, …) or Pass/No Pass.
Subject                                    Requirement              Purdue Equivalent
CHEMISTRY                         General Chem., plus one      CHM 111/112
(3-9 credits)                           semester of: Organic
                                            Inorganic, Analytical,
                                            Physical or Biochemistry
PHYSICS                               General                              PHYS 220/221
(3-6 credits)
MATHEMATICS                      Calculus                             MA 223/224
(3-6 credits)
BIOLOGY                                General                              BIOL 110/111
(3-6 credits)
Minimum of 1 semester (3 credits) in each of the 4 areas: biology, chemistry, physics and math
·         Minimum of 7 semesters total in the 4 areas. 
In essence, this allows students to have only one semester of coursework in each of two areas that are less directly related to their work.  For example, students coming from plant biology might take only one semester each of physics and calculus, while those coming from engineering might take one semester of biology and two semesters of chemistry.
·         Minimum of 1 semester (3 credits) in each of the 4 areas: biology, chemistry, physics and math
·         Minimum of 7 semesters total in the 4 areas.
Note—there has always been the option to petition for a substitution or exemption under exceptional circumstances, and the Graduate Committee reaffirms that option.  A more advanced math class (linear algebra, for ex.) might be able to substitute for a second semester of calculus.  A written petition to the Graduate Committee, explaining the request and the rationale, will be reviewed and a decision made on a case by case basis.  In the case of a course that the petitioner claims is equivalent to the requirement (most often with some international students), an explanation of that equivalency, consisting of a course syllabus or detailed description of course content, should be included.