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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

EFFECTS OF CLAY FRACTION MINERALOGY ON PHYSICAL ATTRIBUTES OF A YELLOW ULTISOL TREATED WITH CHISELING

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Author(s):
Deise C. S. Nogueira [1] ; Carolina Fernandes [2] ; Luma C. de Souza [3] ; Lívia A. Camargo [4] ; Antonio S. Ferraudo [5]
Total Authors: 5
Affiliation:
[1] Unesp. Faculdade de Ciências Agrárias e Veterinárias (FCAV) - Brasil
[2] Unesp. Faculdade de Ciências Agrárias e Veterinárias (FCAV) - Brasil
[3] Unesp. Faculdade de Ciências Agrárias e Veterinárias (FCAV) - Brasil
[4] Universidade de Campinas - Brasil
[5] Unesp. Faculdade de Ciências Agrárias e Veterinárias (FCAV) - Brasil
Total Affiliations: 5
Document type: Journal article
Source: Engenharia Agrícola; v. 40, n. 4, p. 433-442, 2020-08-28.
Abstract

ABSTRACT The objective of this study was to evaluate the influence of minerals in the clay fraction on physical attributes of Yellow Ultisol cultivated with sugarcane and prepared with two different treatments: chiseling across the entire area and chiseling only in planting rows. The samples were collected from four layers of soil at eight months after planting. We assessed the texture of the soil, levels of iron extracted by dithionite-citrate-bicarbonate (DCB) and ammonium acid oxalate (AAO), ratio of kaolinite/(kaolinite + gibbsite), soil bulk density, and soil penetration resistance. The first area showed a higher ratio of kaolinite/(kaolinite + gibbsite) and the second area had greater levels of iron extracted by DCB. Levels of iron extracted by DCB were inversely correlated with soil bulk density and penetration resistance, while the kaolinite/(kaolinite + gibbsite) ratio was directly correlated with soil bulk density and penetration resistance. The area with a greater kaolinite/(kaolinite + gibbsite) ratio had higher values of soil bulk density and soil penetration resistance and the area with higher levels of iron showed lower values of soil bulk density and soil penetration resistance. The mineralogy influenced the soil's physical attributes, while soil preparation treatments did not. (AU)

FAPESP's process: 14/14490-2 - Tillage systems for planting sugarcane in order to improve the productive capacity of the soil and reduce the environmental impact from this operation
Grantee:Carolina Fernandes
Support Opportunities: Regular Research Grants
FAPESP's process: 12/20681-0 - Mapping of specific areas of management using clay fraction iron oxides in Oxisol under cultivation of sugar cane.
Grantee:Livia Arantes Camargo
Support Opportunities: Scholarships in Brazil - Post-Doctoral