Online Encyclopedia

Search over 40,000 articles from the original, classic Encyclopedia Britannica, 11th Edition.

RAPE (Lat. rapum or rapa, turnip)

Online Encyclopedia
Originally appearing in Volume V22, Page 899 of the 1911 Encyclopedia Britannica.
Spread the word: del.icio.us del.icio.us it!

See also:

RAPE (See also:Lat. rapum or rapa, See also:turnip)  , in See also:botany.—Several forms of See also:plants included in the genus Brassica are cultivated for the oil which is See also:present in their ripe seeds . The one most extensively grown for this purpose is known as colza, See also:rape or coleseed, in See also:Germany as Raps (Brassica napus, See also:var. oleifera): its seeds contain from 30 to 45%, of oil . The leaves are See also:glaucous and smooth like those of a swede See also:turnip . For a See also:seed-See also:crop rape is sown in See also:July or See also:early See also:August in See also:order that the plants may be strong enough to pass the See also:winter uninjured . The See also:young plants are thinned out to a width of 6 or 8 in. apart, and afterwards kept clean by hoeing . The foliage may be eaten down by See also:sheep early in autumn, without injuring it for the See also:production of a crop of seed . In See also:spring the See also:horse and See also:hand See also:hoe must be used, and the previous application of 1 cwt. or 2 cwt. of See also:guano will add to the productiveness of the crop . On See also:good See also:soil and in favourable seasons the yield sometimes reaches to 40 bushels per See also:acre . The haulm and husks are either used for See also:litter or burned, and the ashes spread upon the See also:land . It makes good See also:fuel for See also:clay-burning . There is a " summer " variety of colza which is sown in See also:April and ripens its seed in the same See also:year . It does not yield so much oil as the " winter " See also:kind, but it will grow on soil in poorer See also:condition .

Neither of these is much grown in See also:

Great See also:Britain for the production of oil, but the " winter " variety is very extensively grown as See also:green See also:food for sheep . For this purpose it is generally sown at See also:short intervals throughout the summer to provide a See also:succession of See also:fodder . It is peculiarly adapted for peaty soils, and is accordingly a favourite crop in the fen lands of See also:England, and on recently reclaimed mosses and See also:moors elsewhere . Its growth is greatly stimulated by the ashes resulting from the practice of paring and burning . Its highly nutritious leaves and stems are usually consumed by folding the sheep upon it where it grows, there is no green food upon which they fatten faster . Occasionally it is carried to the See also:homestead, and used with other See also:forage in carrying out the See also:system of soiling See also:cattle . The See also:wild See also:form Brassica campestris, the wild coleseed, colza or kohlsaat, of the See also:fields of England and many parts of See also:Europe, is sometimes cultivated on the See also:European See also:continent for its seed, which, however, is inferior in value to rape as an oil-yielding product . In addition to the previously mentioned rape, a variety of another See also:species (or subspecies) of Brassica, namely, Brassica rapa, var. olcifera (Rubsen in Germany), is grown for its oil-yielding seeds . The- leaves in a young See also:state are not glaucous, but See also:sap-green in See also:colour and rough, being very similar to those of the turnip, to which the plant is closely related . Both winter and summer varieties are grown; they are rarely cultivated in Britain . The oil is similar to that in the true colza seeds but the plants do not yield so much per acre as the latter: they are, however, hardier and more adapted for cultivation on poor sandy soils .

End of Article: RAPE (Lat. rapum or rapa, turnip)
[back]
RAPE
[next]
RAPE (from Lat. rapere, to seize)

Additional information and Comments

There are no comments yet for this article.
» Add information or comments to this article.
Please link directly to this article:
Highlight the code below, right click and select "copy." Paste it into a website, email, or other HTML document.