'''Chemical components'''
...nown copyright status removed: [[image:Dammarane1.jpg|thumb|right|Chemical structures of 11 ginsenosides. Reproduced with permission from the article “Comparat
6 KB (779 words) - 10:10, 25 October 2007
== Chemical defence of seeds ==
...type of predator, may be used in each type of structure (Janzen 1971). A chemical defence strategy may protect seeds both pre- and post-dispersal. The prese
7 KB (1,068 words) - 10:41, 23 September 2007
...it may practically fail; but in the latter case the life of the brilliant structures is fleeting, and green is promptly predominant. "Color" is more or less res
...ese colors are produced by two groups of pigments essentially different in chemical and physical properties; yet these pigments are frequently blended in the s
5 KB (921 words) - 16:20, 29 January 2010
...ts, or manufactured through natural processes (such as [[composting]]), or chemical processes (such as the [[Haber process]]).
...n there is the matter of how effective they are at promoting plant growth, chemical [[soil test]] results aside. The answers are encouraging. Since the majorit
22 KB (3,099 words) - 12:48, 8 April 2007
...nsible for inflammation of the digestive organs of cattle. The hygrometrie structures attached to the fruits of such grasses as Stipa capillata (Russia), S. spar
The poisonous plants, however, are those that contain some chemical poison which either produces irritation, disease, or death by its direct ac
11 KB (1,771 words) - 15:08, 16 September 2009
...peak maturity, as it would be from a home [[garden]]). Also, the need for chemical preservatives and [[food irradiation|irradiation]] to artificially extend [
...rm byproducts like [[manure]] and [[crop residue]]s may be used to replace chemical [[fertilizer]]s, while on-farm produced [[silage]] and leguminous crops may
17 KB (2,667 words) - 15:01, 9 April 2007
...logical controls like Bt (''Bacillus thurengensis''), predatory insects or chemical pesticides. Diseases of cauliflower include black rot, club root and viral
...roccoli]] are the same [[Brassica oleracea|species]] and have very similar structures, though cauliflower replaces the green flower buds with densely packed whit
14 KB (2,349 words) - 04:48, 17 June 2009
...strength when dry. Such resin-saturated heartwood is called "fat lighter". Structures built of fat lighter are almost impervious to rot and termites; however the
...oven-dried wood retains a small percentage of moisture, but for all except chemical purposes, may be considered absolutely dry.
30 KB (4,953 words) - 08:58, 25 May 2007
...emerge as small, but fully formed earthworms, except for a lack of the sex structures, which develop later in about 60 to 90 days. They attain full size in abou
* '''Chemical'''. As well as dead [[organic matter]], the earthworm also ingests any othe
24 KB (3,609 words) - 04:03, 8 March 2010
...ircumstantial evidence that they may have existed 250 million years ago. A chemical used by plants to defend their flowers, [[oleanane]], has been detected in
...ithout bright [[color]]s and obvious shapes. Expending [[energy]] on these structures would appear to be a liability, unless they provide significant benefit.
28 KB (4,152 words) - 02:13, 10 February 2010
...achno | coauthors = Jankun, A. | title = Phosphatase activity in glandular structures of carnivorous plant traps | pages = 1716 | booktitle = Proc. of the Intern
...traps [[primary growth]]. They generally do not form readily fossilisable structures such as thick bark or wood. The traps themselves would probably not be pres
58 KB (8,691 words) - 12:29, 8 April 2007
...Blume mit Schmetterling und Biene 1uf.JPG|thumb|300px]] Flowers are unique structures housing reproductive parts of plants belonging to the angiosperm branch of
=== Different structures ===
59 KB (9,544 words) - 21:57, 27 November 2011
...will be far more certain if reliance is placed on barn-manures rather than chemical fertilizers.
...haps the most serviceable. It is important to provide ample ventilation in structures of this kind. In some regions, as around Boston, pits are constructed. The
43 KB (7,405 words) - 19:22, 17 June 2009
...ng mushrooms carry their own hazards because of poisons and [[allergens]]. Chemical spot tests are also used for some genera.
Of central interest with respect to chemical properties of mushrooms is the fact that many species produce [[secondary m
49 KB (7,785 words) - 20:55, 8 January 2010
...methods may be mentioned curing, drying, salting, smoking, canning, use of chemical preservatives, and by refrigeration. Of these the last method is the only o
...ed from what is known as the absorption system. This is a combination of a chemical and mechanical process. No compressor is used. Dense aqua-ammonia, which is
95 KB (15,861 words) - 10:40, 28 July 2009
...tectural feature is desired. The general tendency of the building of glass structures is toward extreme simplicity (Fig. 1547, p. 1256). In the extreme South, la
...t the same as the best grade, too much of it finds its way into greenhouse structures. Such sap lumber usually will not last more than two to five years. Too gre
107 KB (18,559 words) - 09:07, 17 September 2009
...ly for sale, in distinction from private conservatories, or more elaborate structures used for the display of plants. See Greenhouse.
Coldframes are box-like structures about 6 feet in width and of any desired length. They usually are built to
83 KB (14,615 words) - 08:36, 12 August 2009
...rs, cheerfully poisoning anything that annoyed them with whatever dreadful chemical that came to hand, unconscious of the long-term effects on fauna and flora,
...know its chemical formula. It is certain that humus does not have a single chemical structure, but is a very complex mixture of similar substances that vary ac
380 KB (62,788 words) - 19:57, 13 July 2009
...and in 1806 by M'Mahon, but these authors do not state to what extent such structures existed in America. In Doctor Hosack's botanic garden. 1801, extensive glas
...ad, in the 'New York Horticulturist,' in 1857. Before that, all greenhouse structures for commercial purposes were formed of portable sashes, and nearly all were
139 KB (22,466 words) - 22:18, 11 January 2010
...cling to supports on their own, and must be manually trained and tied over structures such as arbors and pergolas. Examples: 'Blaze' (repeat-blooming climber), '
...out of favor amid gardeners and landscapers, as they are often labor- and chemical-intensive plants susceptible to myriad pest and disease problems. So-called
188 KB (30,178 words) - 23:37, 5 August 2021