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

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

Description

Title: Evaluating the need for an active depth-control system for direct seeding in Portugal
Author/s:
  • Garrido Izard, Miguel
  • Conceiçao, Luis Alcino
  • Baguena Isiegas, Eva
  • Valero Ubierna, Constantino
  • Barreiro Elorza, Pilar
Item Type: Presentation at Congress or Conference (Article)
Event Title: 8 th European Conference on Precision Agriculture (ECPA)
Event Dates: 11-14 Julio
Event Location: Praga (Republica Checa)
Title of Book: 8 th European Conference on Precision Agriculture
Date: 2011
Subjects:
Freetext Keywords: seeder, working depth, precision seeding, no-till
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Ingeniería Rural [hasta 2014]
UPM's Research Group: LPF-TAGRALIA
Creative Commons Licenses: None

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (573kB) | Preview

Abstract

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).

More information

Item ID: 7047
DC Identifier: http://oa.upm.es/7047/
OAI Identifier: oai:oa.upm.es:7047
Official URL: http://www.ecpa2011.cz/
Deposited by: PIF Miguel Garrido Izard
Deposited on: 11 May 2011 09:30
Last Modified: 20 Apr 2016 16:10
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM