Efeito do tempo de cultivo do solo sobre os limites de atterberg em propriedades rurais do município de Baraúna-RN.

Abstract

The work had objective to evaluate the effect of the time soil culture in the Atterberg limits. Soil samples had collected, in the depth of 0-25 cm, in three farms cultivated with muskmelon, considering 4 times of use: native area and areas with 1, 2 and 3 years. The samples had analyzed in the Laboratory of Soil, Water and Plant Analysis of the UFERSA, how much determination of the liquid, plastic and sticky limits. It was calculated the index of plasticity by difference enters the plastic and liquid limits. The data had submitted to the variance analysis by F test, considering a completely randomized experimental design, in factorial 3 x 4 (3 farms and 4 times of use), with 3 repetitions. The averages had been contrasted by Tukey test 5% of probability. Concluded that the culture time modified the Atterberg limits significantly. The classification of the soil how much to the plasticity it was modified, passing of weakly plastic in the native area for medium plastic in areas under culture. Although one is about one same soil (Typic Haplocambids), significant differences for the Atterberg limits between the studied agricultural farms had been evidenced.