Changes in Physical Quality of Oxisols Under Different Management Systems in the Brazilian Cerrado

Abstract

Soil compaction in agricultural areas has greatly increased in recent decades due to intensive farming practices, including short-cycle crops and machinery intensification. This study aimed to evaluate the impacts of management systems on the physical quality of a dystrophic Yellow Oxisol, in the Cerrado region of Brazil. Treatments consisted of five soil management systems, with five replications (native forest [control], slash-andburn agriculture, pasture, no-tillage, and conventional tillage). Data analysis was performed using a completely randomized experimental design. All systems were analyzed for soil density, macroporosity, microporosity, total porosity, hydraulic conductivity, infiltration, water retention curve, penetration resistance, and soil quality index (S index). The systems had significant effects on soil structure, and the evaluated properties responded well to changes promoted by them. No-tillage implementation raised soil resistance in the area previously damaged by intensive farming. Moreover, soils under pasture and slash-and-burn systems presented higher water retention in field capacity and higher S indexes, thus having a better structural quality.

Impacts of the landscape changes in the low streamflows of Pantanal headwaters—Brazil

“…The expansion of agriculture and ranching modifies the hydraulic properties of soils (Biggs et al, 2006; Chaves et al, 2008; Costa, 2005; De Moraes et al, 2006; Neill et al, 2006). Improper management, machinery intensification and short‐cycle crops affect oxisols structure in Cerrado (Feitosa et al, 2020; Scheffler et al, 2011; Severiano et al, 2011) and Amazon Biomes (Elsenbeer et al, 1999; Germer et al, 2010; Zimmermann et al, 2006). Sub‐surface soil hydraulic conductivity is decreased, increasing the occurrence of perched water tables and overland flow (Germer et al, 2010).…”