Increasing in-farm efficiency and productivity is the main concern of farmers across the world considering the increasing demand of agricultural products and decreasing farmland. Towards that direction, the agricultural sector is being transformed in a rapid pace. Precision agriculture uses innovative technologies to increase crop yield while using lesser resources by establishing a decision management system, which uses data from the farm to control and estimate the number of resources required for a particular process with accuracy and precision. Precision agriculture is a rapidly developing area and emerging sensing technologies play an important role in it. From planting a seed to harvesting the yield, sensors can help growers with providing critical information in every stage of the production. This information can be used by growers to make key decisions to increase application efficiency and optimize inputs usage. Remote sensing systems can provide growers with large sets of data in a very short time, compared to manual data collection processes. The present chapter reviews the advances of sensing technology within farming practices and presents an overview of several categories of sensing systems that are used in agriculture.