The greatest disadvantage of fixed-wing platforms is that they require open space to take-off and land and they fly only forward. Moreover, the review states that the fixed-wing UAVs are more stable, as far as mapping is concerned, and easier to operate in comparison to the rotor-wing. The following review (Petrie, Citation2013) recognizes two main classes of UAV platforms – a fixed-wing and a rotor-wing. It is claimed that by 2050, 7 million drones will be created for numerous purposes and 100,000 of them would be implemented in agriculture. The development of civil drones depends on their capability to fly in different heights, namely, in heights below 150 m above ground. They arrived at the conclusion that UAV-based sensors are very promising for a number of reasons: high spatial resolution, cost-effectiveness, no need for ground-based spectral measurements (Pavelka et al., Citation2016).Īccording to (SESAR Joint Undertaking, Citation2016) Unmanned Aerial Systems could provide farmers with the possibility of achieving their harvesting goals. Researches like (Nebiker, Lack, Abächerli, & Läderach, Citation2016) deal with the questions whether the expensive high-end sensors are better than the low-cost ones and if UAV-based multispectral remote sensing is suitable for yield estimation and plant disease detection. The unmanned aerial vehicles (UAV) are of great importance as they could aid farmers to deal with their everyday tasks in a more advanced way. The best way to meet the future production needs is to apply precision agriculture techniques in combination with the best genetics and cultural practices, equipment and agronomic management to achieve a maximum production (CRC Press Taylor & Francis, Citation2016). The task though is not straightforward, so technical advancement is needed not only in agriculture itself but also in other areas which could be beneficial to the agricultural sphere. These issues could be tackled by making precision agriculture (PA) techniques more widely available. That manner needs to be not only sustainable but also environmentally and economically oriented (CRC Press Taylor & Francis, Citation2016). In order to ensure the health and happiness of future generations, today’s people must live in a sustainable manner. That fact will lead to problems concerning feeding the Earth’s population. By 2050, the world’s population is claimed to increase to 9 billion people (Roser & Ortiz-Ospina, Citation2017). The necessity of new and modern agricultural techniques roots from the rapid world’s population growth. One of the methods proposed to monitor vegetation is by multispectral and thermal imagery in combination with UAV. That is why scientists must seek better solutions and reliable techniques to preserve the environment and moreover to increase the potential of agriculture in a sustainable way. In order to meet the yield’s expectations, nowadays agriculture could even be a threat to the environment. The growing number of the world’s population and the fast-industrial development tend to overexpose the soils and arable fields. For the past decade, UAV has proved to be applicable in many technological spheres.
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