Evaluating the need for an active depth-control system for direct seeding in Portugal

Garrido Izard, Miguel; Conceiçao, Luis Alcino; Baguena Isiegas, Eva; Valero Ubierna, Constantino y Barreiro Elorza, Pilar (2011). Evaluating the need for an active depth-control system for direct seeding in Portugal. En: "8 th European Conference on Precision Agriculture (ECPA)", 11-14 Julio, Praga (Republica Checa).

Descripción

Título: Evaluating the need for an active depth-control system for direct seeding in Portugal
Autor/es:
  • Garrido Izard, Miguel
  • Conceiçao, Luis Alcino
  • Baguena Isiegas, Eva
  • Valero Ubierna, Constantino
  • Barreiro Elorza, Pilar
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 8 th European Conference on Precision Agriculture (ECPA)
Fechas del Evento: 11-14 Julio
Lugar del Evento: Praga (Republica Checa)
Título del Libro: 8 th European Conference on Precision Agriculture
Fecha: 2011
Materias:
Palabras Clave Informales: seeder, working depth, precision seeding, no-till
Escuela: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Departamento: Ingeniería Rural [hasta 2014]
Grupo Investigación UPM: LPF-TAGRALIA
Licencias Creative Commons: Ninguna

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Resumen

The research evaluated the need for an active depth-control system for direct seeding in Portugal. Through the use of an LVDT (linear variable differential transformer) there were observed wide variations on the seed deposition depth (from 17.1 mm to 29.5 mm) during seeding tasks, being recorded by a load cell the force exerted by the seeding arm in order to penetrate the ground. The GPS installed on the tractor showed a variation in the seeding speed from 1 to 5 km/h; thus, a uniform seed deposition was hard to achieve. Problems encountered during the operation of the photocell hindered the obtaining of reliable data, with an achieved seeding dose much lower (2 .7 ± 1.9 seeds/m) than the pre-adjusted dose (5 seed/m). The seeding test confirmed that increasing the pressure of the seeding arm resulted in closer depth to the set-point. Nevertheless, due to soil strength variability (1001 ± 253 kPa by penetrometer resistance) and ground stubble, a high percentage of seeds were deposited on the surface (above 30%, according to chassis seeder displacement measured by the LVDT). In order to improve work quality, the development of an active control system for the seeder under certain soil conditions (heavy field texture with 5.21% of humidity) attains great importance in Alentejo (main grain growing Portuguese region).

Más información

ID de Registro: 7047
Identificador DC: http://oa.upm.es/7047/
Identificador OAI: oai:oa.upm.es:7047
URL Oficial: http://www.ecpa2011.cz/
Depositado por: PIF Miguel Garrido Izard
Depositado el: 11 May 2011 09:30
Ultima Modificación: 20 Abr 2016 16:10
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