Soil use and management systems, time since adoption, and their impacts over aggregation

Abstract

The Cerrado biome is of notable territorial relevance in the state of Piaui, Brazil. This region is an area of reference for food production. The aim of this work was to evaluate the stability of soil aggregates in water, in function of different soil use and management systems, as well as of the time since adopting these systems in Cerrado areas in the southwest region of Piaui. In this study, nine soil use and management systems were evaluated, arranged in the following manner: no-tillage system of three and six years of use, pasture of two and six years, eucalypt of six and twelve years, conventional tillage of two and eight years, and native Cerrado (Savana). The analyzed variables were: organic carbon, mean geometric diameter, mean weight diameter, aggregate stability index and aggregate diameter classes. Aggregation in Ferralsol is favored by clay and organic carbon contents. The longer adoption time in the no-till, pasture and eucalypt systems favored soil aggregation, while in conventional tillage there was a reduction of the aggregates.

Soil tillage systems and their effects on soybean crop development

“…A contagem foi realizada até o número total de plântulas se tornar constante em cada parcela por três dias consecutivos, de a ação microbiana, tornando-a mais susceptível a mineralização (Schwartz, Baumhardt & Evett, 2010). Assis e Lanças (2010), observaram em seu trabalho que a percentagem de agregados maiores que 2,00 mm na profundidade de 0-5 cm aumentou ao longo do tempo no sistema de plantio direto pois nesse preparo há a ausência de mecanização frequente e a proteção da palhada sobre o solo (Silva et al, 2018).…”

Geografia contextualizada no Semiárido Baiano: Um estudo sobre a Cultura Igarense

“…O método para captura do radical livre DPPH baseia-se na transferência de elétrons de uma substância antioxidante ou de uma espécie radicalar. A transferência de elétrons é perceptível pela mudança de coloração, em que o DPPH de coloração púrpura é reduzido a difenil-picril-hidrazina de coloração amarelada, com consequente desaparecimento da absorção, podendo ser monitorado pelo decréscimo da absorbância (SILVA et al, 2018;NASCIMENTO et al, 2011).…”

Changes in soil profile hydraulic properties and porosity as affected by deep tillage soil preparation and Brachiaria grass intercropping in a recent coffee plantation on a naturally dense Inceptisol

“…However, in spite of the increasing adoption of Brachiaria intercropped with coffee (Serafim et al, 2013a(Serafim et al, , 2013b, very scarce information exists on its effects on soil hydraulic properties when combined with subsoiling operations during coffee plots installation. As soil water availability to coffee plants is strongly dependent on soil physical attributes (Kahlon et al, 2013;Silva et al, 2015Silva et al, , 2017Silva et al, 2018Silva et al, , 2019Barbosa et al, 2020), understanding how different management practices may affect water infiltration, redistribution and storage processes in soils is key for crop development in coffee plantations.…”