Journal
REVISTA BRASILEIRA DE CIENCIA DO SOLO
Volume 29, Issue 3, Pages 447-457Publisher
SOC BRASILEIRA DE CIENCIA DO SOLO
DOI: 10.1590/S0100-06832005000300015
Keywords
sugarcane; vinasse; Barreiras formation; angle of internal friction
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The shear tension and soil cohesion are important soil physical properties. They are affected by management systems and the content of Fe, Si and Al oxides in the soil. The effects of different sugarcane management systems on the shear tension, angle of internal friction, soil cohesion, and the contents of Fe, Si and Al oxides in a Cohesive Yellow Argisol were studied in four areas of the Triunfo mill in Alagoas State, Brazil. The treatments consisted of an area cultivated with irrigation and another without irrigation, a site with vinasse application. A native forest area was included as reference for the original conditions. Samples were collected from each site at depths of 0.2-0.4 m and 0.4-0.8 m. The areas cultivated with and without irrigation promoted the greatest increase in soil cohesion, angle of internal friction and soil shear strength. The water and oxide contents affected the soil cohesion; the highest soil cohesion values were obtained in soils with the lowest water and the highest oxide contents.
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