Drylands are defined by a scarcity of water. Drylands are zones where precipitation is balanced by evaporation from surfaces and by transpiration by plants (evapotranspiration). Dry sub-humid semi-arid hyper-arid lands. Drylands are complex, evolving structures whose characteristics and dynamic properties depend on many interrelated interactions between climate, soil, and vegetation. Dryland farming and dry farming encompass specific agricultural techniques for the non-irrigated cultivation of crops. They are also associated with arid conditions, areas prone to drought and those having scarce water-resources. Mix mixed prairie moorland lowland meadow bare simple aerial fly flying rise rising crane. UHD 4K 3840×2160.