A worker bee will harvest pollen from only one plant, such as apple, until it exhausts that supply. Other insects will flit from fruit to dandylion, which does the apple tree no good. Hence, honeybees are extremely effective at increasing crop yields.
Commercial farmers pay beekeepers to bring hives to their blossoming crop.
The video shows how to maintain healthy productive hives. They convert plant nectar into honey, which they store for a winter food source. The beekeeper typically harvests 30 to 60 pounds of honey per hive per year. Honey can be stored indefinitely, as it will not rot. It is excellent for baking sweet treats.