# ISO 5721:1989 — Withdrawn and superseded ISO standards

For ISO 5721:1989, item title is Tractors for agriculture — Operator's field of vision; status code is 9599; successor is ISO 5721-1:2013 | ISO/CD 21495-1 | ISO 5721-2:2014; withdrawn / published date is 1989-10-12, recorded from its source on 2026-08-05.

- **Identifier:** ISO 5721:1989 _(verified: appears in the quote below)_
- **Item title:** Tractors for agriculture — Operator's field of vision _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 5721-1:2013 | ISO/CD 21495-1 | ISO 5721-2:2014
- **Withdrawn / published date:** 1989-10-12 _(verified: appears in the quote below)_

## What the source says

> 11830,IS,,ISO 5721:1989,Tractors for agriculture — Operator's field of vision,Tracteurs agricoles — Champ de visibilité du conducteur,1989-10-12,2,['65.060.10'],ISO/TC 23/SC 4,9599,[11829],"[56751,71008,56752]","['en','fr']",7,"<p>This second edition cancels and replaces the first edition (1981). Specifies practical and mathematical methods of determining the masking effects of obstruction on the angles of vision forward, to the rear and upwards of seated operators of tractors. It does not take account of detachable implements and mounted elements, for example front loaders, pallets, ect.</p>"

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).