This book is based on the research on the influence of long-term application of fertilizers on weed floristic diversity in maize-wheat cropping system under mid hill conditions of Himachal Pradesh. The study was undertaken in an ongoing long-term fertilizer experiment under the aegis of AICRP- LTFE, Department of Soil Science, CSK HP Krishi Vishvavidyalaya, Palampur, India during kharif 2018 and rabi 2017-18 and 2018-19.