Soil managements and their influence on the soil physical properties and on the sweet potato yield

• Grant number: 13/14385-1
• Support Opportunities: Regular Research Grants
• Start date: March 01, 2014
• End date: February 29, 2016
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Amarílis Beraldo Rós
• Grantee: Amarílis Beraldo Rós
• Host Institution: Agência Paulista de Tecnologia dos Agronegócios (APTA). Secretaria de Agricultura e Abastecimento (São Paulo - Estado). São Paulo , SP, Brazil

Abstract

The conventional tillage can reduce the soil quality due to exposure and degradation of organic compounds, for the favoring of conditions for the formation of a compacted zone below the plowed layer and for the ease that the pulverized soil is eroded. Thus, the adoption of tillage systems with minimal tillage favors the maintenance and restoration of physical, chemical and biological soil properties and, as a result, the crops yields are satisfactory. For implantation of sweet potato crop is made the revolving of the surface layer by plowing followed by leveling and making mounds. Thus, there is the burial of almost all remaining plant residues from previous crops and the soil is unprotected of vegetation until the complete covered by the established culture. It is known that, among the management components, soil preparation is the activity that most influences its physical behavior by acting directly on its structure, soil physical properties can be used as quality indicators. Thus, this study aims to assess the impact of soil tillage systems (conventional - plowing followed by leveling -, conventional tillage followed by making mounds, no tillage - no soil disturbance except in the planting rows - and making mounds in the area without prior revolving of the soil), on the presence or absence of straw, on the physical properties of a Alfissol type soil and on the sweet potato root yield. (AU)