Agricultural production is part of a long chain of activities that starts from seeding and stretches all the way to the consumer. It should meet consumer expectations in terms of quality, safety, and also value or price. Many intermediate steps are involved and these often involve handling, storage, and transportation across national borders or continents. Precision agriculture (PA) technologies share the underlying ideas of good agricultural practices (GAP) and may become important tools for complying with regulations and for documentation of the production conditions as a proof of compliance. Precision farming and the use of global positioning systems (GPS) on agricultural machinery provide location and time information for all treatments. GAP reduces the incidence and intensity of pests and diseases, and also the use of chemical control methods. GAP implies that the correct dose of fertilizer is applied at the correct moment and in the correct way.