From farm to fork, the communication and information technology industry is being improved to aid farmers, croppers, and other consumers of intelligent services. The technological advance incorporates the creation of smart gadgets and Internet of Things (IoT) services. To feed the continuously expanding global population, the agricultural sector must be expanded. The IoT paves the way for intelligent farming solutions to boost agriculture productivity. IoT technologies provide farmers with historical and real-time data for forecasting the quality of the soil, weather patterns, and crop growth as a service. Smart agriculture offers expanded opportunities for process automation, assessment, and reducing waste. As a consequence, these characteristics significantly improve the quality and quantity of food items while decreasing their manufacturing costs. There has been highlighted the key IoT ecosystem components in this study. In addition to this, there is identified current study obstacles and discussed future research areas for agricultural IoTs.