This book covers topics of synthesis and various properties of herbicides in an in-depth manner. It outlines the detailed studies of various synthetic pathways of specific herbicides and the physical and chemical features of other synthesized herbicides. The objective of this book is to showcase several characteristics and features of herbicides, the physical and chemical properties of specific types of herbicides, and their effects on physical and chemical features of soil and micro-flora. In addition, an assessment of the extent of contamination in soils as well as crops by herbicides has been elaborated along with a research on the performance and photochemistry of herbicides and the impact of excess herbicides in soils and field crops.