Economic use of water in the cultivation of irrigated caupi beans in the semi-arid region of Brazil
Irrigation in agriculture allows to give conditions for plants to express their full production potential in the field, but scientific studies are needed to optimize the use of water in regions that are difficult to access, such as semi-arid regions. In view of this, the present work aimed to determine the economic irrigation depth for the cultivation of cowpea beans in the region of Sertão Alagoano. A creole bean variety commonly cultivated by farmers was used, which was subjected to five irrigation depths (30, 60, 90, 120 and 150% of the evapotranspiration of the culture, ETc).