Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- adjective Of, relating to, or being a plant that flowers only when the duration of daylight is more than a certain amount, as in late spring or early summer.
Etymologies
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Examples
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Gardeners get hung up on whether to grow long-day, short-day or day-neutral varieties, bred to grow in relation to the amount of daylight they get as they mature.
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What matters is that in the mid-Atlantic region you can grow pretty much any onion variety you want, even long-day (i.e., northern) varieties of onions.
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With our present arrangement, we had these long-day marches every other day.
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This evening I need to assemble Linnea's swimming kit and a long-day nappy bag, and prep the lunches.
New Bra! ailbhe 2008
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With our present arrangement, we had these long-day marches every other day.
The South Pole; an account of the Norwegian antarctic expedition in the 'Fram', 1910 to 1912 2003
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Depending on the variety, some plants, like soybean, can either be short-day, long-day or dayneutral.
Chapter 5 1993
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In the Philippines, long-day periods occur during the months of March to August.
Chapter 5 1993
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The yield is normally higher under long-day conditions, but the lower yield of short-day plants is largely compensated by the rapid growth rate under high temperatures (24-30°C), and moderate yields are therefore attainable in the tropics, though the cultivar is important (see Day-length).
Chapter 20 1987
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However, it goes to seed very early when introduced into the long-day conditions in Pennsylvania and can be used to breed for early-maturing traits.
2 The Plants 1984
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With our present arrangement, we had these long-day marches every other day.
The South Pole; an account of the Norwegian Antarctic expedition in the "Fram," 1910-12 — Volume 1 and Volume 2 Roald Amundsen 1900
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