Copper nanomaterials have received considerable attention in recent years due to their potential applications in precision agriculture and smart farming. A variety of applications of nanomaterials are discussed in this chapter, including crop protection, disease management, nutrient management, soil remediation, sensing and monitoring, and controlled release systems. Moreover, these materials can be applied to sensing and monitoring systems and can detect plant health conditions in real time. They are also used in the controlled, targeted release of agrochemicals, fertilizers, and growth regulators, resulting in improved agricultural productivity. The exploration of copper nanomaterials in precision agriculture and smart farming indicates potential for improving practices while minimizing environmental impact and ensuring sustainable farming. However, there are several concerns regarding using copper nanomaterial in agriculture, including toxicity and accumulation in soil. These problems can be resolved by encapsulating copper nanomaterials with biodegradable polymers and integrating technologies like nanorobotics and autonomous systems, which can promote minimized release and reduce unwanted effects on the plant and the environment. The aim of this chapter is to provide overview of copper-based nanomaterials for precision agriculture and smart farming.