Cost of Purchase
Drones qualified for the use in agriculture are quite costly. For some drones, the heavy cost includes the cost of hardware, software, tools and imaging sensors.
Buying a drone that is not equipped with the necessary features can be cheaper. Besides this, purchasing drones equipped for the use in agriculture can be costly in the short run, but worthwhile in the long run.
Federal Laws (depend on the country)
The use of drones for agriculture purposes is considered commercial. This means that the farmer needs to undergo FAA operator training (in USA) in order to acquire a remote pilot certificate or to hire an operator with such qualifications. FAA also demands that drones must fly at an altitude of less than 400 feet.
Agricultural drones share the same airspace with manually manned aircraft, so they are proneto interference. Therefore, it is recommended to the farmer manage his flight with the local airport or the FAA (in USA) before doing it.
The truth is that not all the arable farmlands have a good online coverage to support the drone. Any farmer that is intending to use drones has to invest in connectivity or buy a drone capable of capturing and storing data locally in a format that can later be processed.
Drones are much more dependent of climatic conditions, which means that if it’s very windy or rainy outside you may not be able to fly and use them.
Knowledge and Skill
The images require analysis by a skilled personnel in order to transform it into useful information. Actually, an average farmer without these skills may need training or may be forced to hire a skilled personnel with the analysis software to help out with the image processing and data analysis.