The Doctor of Philosophy degree program with a major in forestry is open to nonforesters as well as foresters. Forestry specialties are studied in depth.

Qualified students with undergraduate degrees in forestry can usually complete the requirements for the Doctor of Philosophy degree in forestry in six semesters. The student must meet the requirements of the university and of the College of Agriculture and Natural Resources. The student must also complete additional requirements for the program as specified by the student's academic advisor.

Program requirements are highly variable, depending on the student's background of study and experience. In all cases, the student must complete an acceptable dissertation incorporating the results of original research.