The text you provided is already in a formal tone. However, I can rephrase it to make it sound even more formal if you'd like. Here's a possible rephrased version:
The "Question Bank for Agriculture" is an exceedingly useful and comprehensive resource for undergraduate, post-graduate, and Ph.D. students, as well as individuals preparing for competitive exams such as ARS, NET, UPSC, PG entrance (SAUs), ICAR JRF/SRF, and other state entrance exams. This book is noteworthy for its inclusion of a vast array of multiple choice questions from various fields within agriculture, including but not limited to Genetics, Seed Science and Technology, Biotechnology, Environmental Science, Entomology, and Nematology.
Ruchi Bajpai: BSc.(Ag), MSc.(Seed Science & Technology),Ph.D (Seed Science & Technology), Asst. Prof. & Head of the Department, Department of Agriculture, Phonics Group of Institutions, Roorkee, Uttarakhand, India
Purna Jana: BSc. & MSc.(EVS), Ph.D (Forestry), Assistant Professor, Department of Agriculture, Phonics Group of Institutions, Roorkee, Uttarakhand, India
Ram Vakil Rawat: BSc.(Ag), MSc.(Entomology), Assistant Professor, Department of Agriculture, Phonics Group of Institutions, Roorkee, Uttarakhand, India
1. Genetics 2. Seed Technology 3. Biotechnology & Biochemistry 4. Environmental Science 5. Entomology & Nematology