Teste e calibração do “modelo de umidade do solo para atividades agrícolas”(MUSAG).

Abstract

The objective of this paper was to evaluate the model MUSAG, at field conditions, determining the infiltration parameters percolation and evaporation associated to the model. The soil moisture was measured at 20cm, 40cm, 60cm, 80cm e 100cm, and were compared with the predicted by the model. The infiltration rate, hydraulic conductivity, deep percolation and evaporation, was obtained as a function of soil moisture and the parameters of the model were determined by linear regression. For all depths, except 40 cm, the “t” values were always below the tabulated values, for α = 0,01; thus, the MUSAG may be used to estimate soil water content, in soils and climate similar to the experimental site.