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The irrigation management is aimed at the rational use of water in agriculture, allowing for a more efficient use of water and the economic, social and environmental sustainability of irrigation applied. Proper irrigation management can be performed with the aid of equipment called tensiometer. Thus, the aim of this study was to monitor the water potential an oxisol Indeed cover with straw at different times of day through tensiometers installed at different depths. The experiment was conducted in pots with a randomized block design, where they were installed 3 tensiometers in 0-10; 10 -20 and 20-40cm deep in an Oxisol with and without mulch. Hates tensiometer was used PVC tube type with acrylic tube without tensimeter three different lengths at the three depths. Pots of 60 cm in height were used as a ground volume of 60 liters. We used the manovacuum gauge is digital measuring the matrix potential in the range of 0-96 kPa, with an accuracy of 2%. Representative curves of soil water stress were performed with and without coverage function of time at different depths. 12 hours there was the greatest water stress values in the soil both soil covered as discovered, and there was a difference of 51.18% for 8 hours in bare soil and 30.10% in soil covered straw.

MONITORAMENTO TENSIOMETRICO DA VARIAÇÃO TEMPORAL DA TENSÃO DE ÁGUA EM UM LATOSSOLO