Labor (1) Wheat (1) Wetlands (1) Twenty-first century (1) Soils (1) Soil fertility (1) Social sciences (1) Science (1) Profit (1) Production (Economic theory) (1) Paper (1) Industrial productivity (1) Corn (1) Climatic changes (1) Carbon dioxide (1) Atmosphere (1) Arid regions (1) Agricultural productivity (1) Ability (1) Agricultura--Productividad (1) Suelos--Fertilidad (1) Suelo (1) Regiones áridas (1) Siglo veintiuno (1) Cambios climáticos (1) Dióxido de carbono (1) Zonas húmedas (1) Ciencias (1) Trigo (1) Productividad (1)