Fichièr:Centaurea solstitialis plant1 (12094183085).jpg
Talha d'aquesta previsualizacion: 800 × 600 pixèls. Autras resolucions : 320 × 240 pixèls | 640 × 480 pixèls | 1 024 × 768 pixèls | 1 280 × 960 pixèls | 2 592 × 1 944 pixèls.
Fichièr d'origina (2 592 × 1 944 pixèl, talha del fichièr: 885 Ko, tipe MIME: image/jpeg)
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Descripcion
| Descripcion | Introduced, warm-season, annual or short lived perennial, erect herb, to 75 cm tall; taproot is about 20 cm long with numerous laterals. Leaves and stems are spineless and have a covering of downy hairs, giving a greyish appearance. Heads are solitary; bracts have stout spines and the florets are yellow and all tubular. Flowering is in spring and summer. Occurs in exposed situations on fertile or drier soils, usually in neglected areas and roadsides with poor ground cover. Occasionally invades unimproved grazing land; grows best in areas of more than 600 mm rainfall, but can be troublesome in semi-arid rangelands. Thought to be allelopathic, restricting growth of competing species. Poisonous to horses. Strong, competitive well managed pastures are the long term solution. Slashing can be an effective control; best undertaken at early flowering and in dry conditions; repeat slashing may be needed. Intensive grazing in spring before spines form will reduce seed set. Seedlings and rosettes can be controlled through repeated shallow cultivations. Herbicides are most effective when rosettes are small. |
| Data | |
| Font | Centaurea solstitialis plant1 |
| Autor | Harry Rose from South West Rocks, Australia |
Publicat jos licéncia(s)
Aqueste fichièr es jos licéncia Creative Commons licéncia generica atribucion 2.0
- Sètz liure :
- de partejar – de copiar, distribuir e transmetre aquesta òbra
- d'adaptar – d'adaptar aquesta òbra
- Jos las condicions seguentas :
- atribucion – Vos cal atribuir aquesta òbra amb lo biais especificat per l'autor o lo concedent (mas pas dins un sens que suggerís que vos apròvan o qu'apròvan l'utilizacion d'aquesta òbra).
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Cette image a été originellement postée sur Flickr par Macleay Grass Man à l'adresse https://www.flickr.com/photos/73840284@N04/12094183085. Elle a été passée en revue le 26 mai de 2015 par le robot FlickreviewR, qui a confirmé qu'elle se trouvait sous licence cc-by-2.0. |
Istoric del fichièr
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| Data e ora | Miniatura | Dimensions | Utilizaire | Comentari | |
|---|---|---|---|---|---|
| actual | 26 mai de 2015 a 14.26 | | 2 592 × 1 944 (885 Ko) | Amada44 | Transferred from Flickr via Flickr2Commons |
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