This book will be helpful to both researchers and students who wants to design, fabricate and perform evaluation of self propelled power sprayer machines. The newly designed power sprayer save both cost and time. A base sprayer of dimension 6 feet by 3 feet was built. In this designed machine pressure can be controlled by pressure valves according to crop requirements. Effect on spraying, its pressure and vehicle speed was analyzed and noted at vehicle running as well as stationary condition.