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Ponencias en congresos:
Evaluating the need for an active depth-control system for direct seeding in Portugal
Año:2011
Áreas de investigación
  • Agricultura
Datos
Descripción
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).
Internacional
Si
Nombre congreso
8th European Conference on Precision Agriculture (ECPA)
Tipo de participación
960
Lugar del congreso
Praga
Revisores
Si
ISBN o ISSN
978-80-904830-5-7
DOI
Fecha inicio congreso
11/07/2011
Fecha fin congreso
14/07/2011
Desde la página
371
Hasta la página
381
Título de las actas
Precision Agriculture 2011
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Miguel Garrido Izard (UPM)
  • Autor: Luis Alcino Conceiçao (Escola Superior Agrária do Instituto Politécnico de Portoalegre)
  • Autor: Eva Baguena Isiegas (UPM)
  • Autor: Constantino Valero Ubierna (UPM)
  • Autor: Pilar Barreiro Elorza (UPM)
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