File:Centaurea solstitialis flowerhead7 (12094206085).jpg
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Summary
[edit]DescriptionCentaurea solstitialis flowerhead7 (12094206085).jpg | 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. |
Date | |
Source | Centaurea solstitialis flowerhead7 |
Author | Harry Rose from South West Rocks, Australia |
Licensing
[edit]This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image, originally posted to Flickr, was reviewed on 26 May 2015 by the administrator or reviewer INeverCry, who confirmed that it was available on Flickr under the stated license on that date. |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:32, 2 February 2020 | 2,650 × 1,988 (1.39 MB) | Salicyna (talk | contribs) | Cropped 34 % horizontally, 34 % vertically using CropTool with precise mode. | |
02:02, 27 May 2015 | 4,000 × 3,000 (3.61 MB) | SteinsplitterBot (talk | contribs) | Bot: Image rotated by 90° (EXIF-Orientation set from 8 to 1, rotated 0°) | ||
14:26, 26 May 2015 | 3,000 × 4,000 (3.61 MB) | Amada44 (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
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Camera model | Canon PowerShot A650 IS |
Exposure time | 1/250 sec (0.004) |
F-number | f/2.8 |
ISO speed rating | 80 |
Date and time of data generation | 08:57, 14 November 2010 |
Lens focal length | 7.4 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Picasa |
File change date and time | 11:37, 23 January 2014 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 08:57, 14 November 2010 |
Meaning of each component |
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Image compression mode | 5 |
APEX shutter speed | 7.96875 |
APEX aperture | 2.96875 |
APEX exposure bias | 0 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 13,745.704467354 |
Focal plane Y resolution | 13,698.630136986 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Portrait |
Unique image ID | 4691fcf0c3666252a40c1944be4fe48a |
Keywords |
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IIM version | 4 |