Definitions for johnson grass
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Johnson grass, Aleppo grass, means grass, evergreen millet, Sorghum halepense(noun)
tall perennial grass that spreads by creeping rhizomes and is grown for fodder; naturalized in southern United States where it is a serious pest on cultivated land
A perennial Mediterranean grass (Sorghum halepense) cultivated for forage
a tall perennial grass (Sorghum Halepense), valuable in the Southern and Western States for pasture and hay. The rootstocks are large and juicy and are eagerly sought by swine. Called also Cuba grass, Means grass, Evergreen millet, and Arabian millet
Origin: [Named after W. Johnson of Alabama, who planted it about 1840-1845.]
Sorghum halepense, commonly called Johnson grass, is a plant in the grass family, Poaceae, native to the Mediterranean region, but growing throughout Europe and the Middle East. The plant has been introduced to all continents except Antarctica, and most larger islands and archipelagos. It reproduces by rhizomes and seeds. Johnsongrass has been used for forage and to stop erosion, but it is often considered a weed for the following reasons: ⁕Foliage that becomes wilted from frost or hot dry weather can contain sufficient amounts of hydrogen cyanide to kill cattle and horses if it is eaten in quantity. ⁕The foliage can cause 'bloat' in such herbivores from the accumulation of excessive nitrates; otherwise, it is edible. ⁕It grows and spreads so quickly that it can 'choke out' other cash crops that have been planted by farmers. This species occurs in crop fields, pastures, abandoned fields, rights-of-way, forest edges, and along streambanks. It thrives in open, disturbed, rich, bottom ground, particularly in cultivated fields. Johnsongrass resistant to the popular herbicide glyphosate has been found in Argentina and the United States. It is considered to be one of the ten worst weeds in the world.
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"johnson grass." Definitions.net. STANDS4 LLC, 2015. Web. 27 Nov. 2015. <http://www.definitions.net/definition/johnson grass>.