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Study of compactibility and soil quality under integrated crop-livestock systems in East Nebraska State, USA

Grant number: 19/19373-8
Support type:Scholarships abroad - Research
Effective date (Start): March 03, 2020
Effective date (End): February 05, 2021
Field of knowledge:Agronomical Sciences - Agronomy - Soil Science
Principal Investigator:Reginaldo Barboza da Silva
Grantee:Reginaldo Barboza da Silva
Host: Humberto Blanco
Home Institution: Universidade Estadual Paulista (UNESP). Campus de Registro. Registro , SP, Brazil
Local de pesquisa : University of Nebraska-Lincoln (UNL), United States  

Abstract

In addition to the socioeconomic challenges demanded by the implementation of integrated agricultural production systems (SIPA) in the great plains of the United States, the challenge of soil science researchers in that country is to establish metrics that confirm the benefits of ecosystem services, promoted by SIPA. Among these services need to be better understood those (services) associated with health and soil quality, especially ON integrated crop-livestock system (iLP), whose trafficability resulting from grazing cattle over crop residues is the most common practice on the Great Plains and Center -Western US. Thus, the assessment of compactability parameters and water and mechanical physical quality e soil of th(Qs), gain relevance. The aims of this research is to prospect the changes of soil compaction parameters and physical-water and mechanical quality of the soil, resulting from the management adopted by the crop-livestock integration system (iLP), in the eastern state of Nebraska, USA. The Research Plan is part of a research project entitled "Impact of Cover Crop Grazing on Soil Erosion and Soil Health Parameters" by Dr. Humberto Blanco, Professor of the Department of Agronomy and Horticulture at the University of Nebraska - Lincoln (UNL). The field and laboratory tests will be conducted in treatments already established by the mentioned project, which combine different crop rotations and cover plants; presence and absence of irrigation; and grazing in different seasons of the year. The evaluations will be done, preliminarily, from 0.0 to 20 and depending on the soil property, the tests will be done from 0-5, 5-10 and 10-20 cm. In accordance with the demand of the project of Prof. Blanco, it was defined the prospecting/characterization of the following soil and water indicators, related to: a) mass and volume of soil constituents; b) aggregate stability; c) soil resistance, rupture and stress-strain and d) soil water dynamics. With results on compactability and soil quality (Qs), it is expected that metrics will be established to improve understanding of the benefits of ecosystem services and soil health from crop and livestock integration in the Great Plains and Midwest of US. (AU)