File:Pregermination maize 2014 05 15 10 38 33 7932.jpg
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DescriptionPregermination maize 2014 05 15 10 38 33 7932.jpg |
English: Premature germination of maize. Soil acidity reduces molybdenum (Mo) availability - in some soils this results in poor Mo nutrition. Molybdenum is essential for nitrate reductase activity, and Mo deficiency can result in a build-up of nitrate in maize grain. This, in turn, can predispose the grain to premature germination. This photograph illustrates the germination of maize grain (still on the cob on standing maize) that is not yet sufficiently dry to harvest. This was from a zero-lime plot in a liming trial. The soil pH (in 1 M KCl) was 3.75 and the acid saturation was 74%. Soil pH (water) was not measured, but was probably between 4.2 and 4.4. There was no evidence of premature germination on limed plots.
Reference: Farwell, A.J., Farina, M.P.W. and Channon, P., 1991. Soil acidity effects on premature germination in immature maize grain. In Plant-Soil Interactions at Low pH (pp. 355-361). Springer Netherlands. |
Date | |
Source | Own work |
Author | Alandmanson |
Camera location | 29° 03′ 17.19″ S, 29° 41′ 27″ E | View this and other nearby images on: OpenStreetMap | -29.054776; 29.690834 |
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current | 13:26, 25 July 2017 | 1,941 × 1,667 (431 KB) | Alandmanson (talk | contribs) | User created page with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon EOS 7D |
Author | Alan Manson |
Exposure time | 1/8,000 sec (0.000125) |
F-number | f/5.6 |
ISO speed rating | 800 |
Date and time of data generation | 10:38, 15 May 2014 |
Lens focal length | 275 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Digital Photo Professional |
File change date and time | 10:38, 15 May 2014 |
Y and C positioning | Centered |
Exif version | 2.21 |
Date and time of digitizing | 10:38, 15 May 2014 |
Meaning of each component |
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APEX shutter speed | 13 |
APEX aperture | 5 |
APEX exposure bias | 0.33333333333333 |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 5,715.545755237 |
Focal plane Y resolution | 5,808.4033613445 |
Focal plane resolution unit | inches |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Scene capture type | Standard |
GPS tag version | 0.0.2.2 |