Oxygen availability (ODR) was found higher in the presence of inorganic fertilizers, both in spring and summer, mean values were detected 54.702 and 60.756 ug • m-2 • s-1, respectively. Mean values of ODR in soil treated with organic fertilizers
were 44.429 ug • m-2 • s-1 in summer and 27.109 ug • m-2 • s-1 in spring (Fig. 7).