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Crotalaria juncea , known as sunn or sunn hemp , is a tropical Asian plant of the legume family ( Fabaceae ). Grown as a source of green manure , fodder and the lignified fiber obtained from its stem, it bears yellow flowers and elongate, alternate leaves. [ 1 ] Sunn hemp is also being looked at as a possible bio-fuel. [ 2 ] [ edit ] Description Annual, c. 60–250 cm tall.
Elaeagnus angustifolia , commonly called silver berry , [ 1 ] oleaster , [ 1 ] Russian olive , [ 1 ] or wild olive , [ 1 ] is a species of Elaeagnus , native to western and central Asia , from southern Russia and Kazakhstan to Turkey and Iran . It is now also widely established in North America as an introduced species . Elaeagnus angustifolia is a usually thorny shrub or small tree growing to 5–7 m in height. Its stems, buds, and leaves have a dense covering of silvery to rusty scales. The leaves are alternate, lanceolate, 4–9 cm long and 1-2.5 cm broad, with a smooth margin.
(Note: If you click on any of the pictures displayed on this page, you will be shown a larger, higher-quality version of the same image.) Nitrogen Fixation Home Page Part I. The range of organisms that can fix nitrogen Part II.
Ceratonia siliqua , close-up of female flower. Green and ripe Carob pods. Abaxial and adaxial surfaces of Carob leaflet.
Lupinus , commonly known as lupin or lupine (North America), is a genus of flowering plants in the legume family ( Fabaceae ). The genus comprises about 280 species (Hughes), with major centers of diversity in South and Western North America (Subgen. Platycarpos (Wats.) Kurl.), parts of the Southern Hemisphere (New Zealand and parts of Australia) and the Andes and secondary centers in the Mediterranean region and Africa (Subgen.
Plant characteristics | Nitrogen fixing | Site Preference | Hardiness | Uses | Problems | Pruning . Scientific Name: Shepherdia argentea (Pursh) Nutt. Plant Characteristics Native to North America, this shrub grows on the prairies from Manitoba to Saskatchewan. Commonly found around sloughs, in coulees, and on light soils on the prairies.
Alnus serrulata , the hazel alder or smooth alder , is a thicket-forming shrub in the family Betulaceae . It is native to eastern North America and can be found found from western Nova Scotia and southern New Brunswick south to Florida and Texas . [ edit ] Description Alnus serrulata leaves (detailed)
Alnus rubra , the red alder , is a deciduous broadleaf tree native to western North America . [ edit ] Description Male catkins with tiny female catkins above It is the largest species of alder in North America and one of the largest in the world, reaching heights of 20–35 m. The official tallest red alder (1979) stands 32 meters tall in Clatsop County, Oregon ( USA ).
Nitrogen-fixing Bacteria Certain bacteria are capable of fixing nitrogen. In this process, nitrogen gas (N 2 ) is converted to ammonium (NH 4 + ), a form of nitrogen that is biologically available to plants. The reaction is catalyzed by the enzyme nitrogenase. Because nitrogenase is inactivated by oxygen, the reaction must occur in a low oxygen environment. Species capable of fixing atmospheric nitrogen generally belong to one of the following phyla of bacteria:
Alder is the common name of a genus of flowering plants ( Alnus ) belonging to the birch family Betulaceae . The genus comprises about 30 species of monoecious trees and shrubs , a few reaching a large size, distributed throughout the north temperate zone . [ edit ] Etymology
How do other plants, which do not have this ability or "partner," benefit from this nitrogen fixation? First, not much nitrogen leaks out of the roots of the nitrogen-fixing plant, in that most of the nitrogen is utilized by the plant and its "partner". The way that other plants benefit is that when leaves from the nitrogen-fixing plant fall off onto the ground, then other bacteria, that live in the soil, convert those leaves, into humus. During this process, the nitrogen in the leaves (mostly in the form of proteins) is changed back into nitrate in the soil, which nearby plants can pick up and use.
Ceanothus integerrimus ( deer brush ) is a woody shrub in the family Rhamnaceae , native to the western United States , in Arizona , New Mexico , California , Oregon , and Washington . It grows in montane chaparral and woodlands regions, in hardwood forests, and in fir, spruce, and Ponderosa pine plant communities , being most abundant in the California chaparral and woodlands and Sierra Nevada . [ 1 ] [ 2 ] [ edit ] Description Ceanothus integerrimus is a deciduous shrub from 1–4 metres (3.3–13 ft) tall with an open ascending to erect branch habit. [ 2 ] It is a drought-tolerant phanerophyte. Nitrogen-fixing actinomycete bacteria form root nodules on Ceanothus roots. [ 3 ] [ 4 ] Its stems are round yellow to pale green in color with either small soft to straight stiff sharp hairs parallel to or in contact with the surface of the stem,. [ 2 ] [ 5 ] The leaves are glossy, deciduous and 2.5–8 cm long.
Plants That Feed The Soil? Nitrogen is one of the most important elements required by growing plants. Some plants form symbiotic relationships with certain types of soil bacteria that live on the plants’ roots are able to “fix” atmospheric nitrogen and make it available to the plant for growth. This gives these plants a decided advantage over other plants, especially in nitrogen-poor soils.