Johnson grass


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Johnson grass:

see sorghumsorghum,
tall, coarse annual (Sorghum bicolor) of the family Poaceae (grass family), somewhat similar in appearance to corn (but having the grain in a panicle rather than an ear) and used for much the same purposes.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Johnson Grass

 

(Sorghum halepense), a perennial herbaceous plant of the Gramineae family; a pernicious weed.

The stems of Johnson grass are 1–2 m high. The inflorescence is a panicle (to 40 cm). There are two or three uniflor-ous spikes on each sprig. A single plant yields several thousand fruits, which drop off and heavily litter the soil. The rhizomes are segmented, with thick internodes and nodes. The mature plant is a vigorous bush with numerous shoots and rhizomes that densely penetrate the topsoil. The principal mass of rhizomes lies up to 20 cm deep, but a few penetrate to a depth of 60–80 cm. Johnson grass is found from the Mediterranean to India and China. In the USSR it is found in the Crimea, the Caucasus, and Middle Asia. The shoots yield a high quantity of nutritive green matter. Johnson grass is readily eaten by horned cattle and horses, both in green form and in the form of hay. At the same time, it is a dangerous and resistant weed of irrigated agriculture; it contaminates all crops, especially cotton. It often grows along the banks of rivers and irrigation ditches. Control measures include deep clod plowing in summer, drying the rhizomes for two weeks; careful and deep cultivation of row crops; sowing alfalfa and mowing it down early (which greatly suppresses and destroys the Johnson grass); autumn plowing to a depth of 20–30 cm; and systematic mowing of Johnson grass in irrigation ditches.

REFERENCES

Agadzhanian, G. Kh. Biologiia gumaia i mery bor’by s nim.Yerevan, 1939.
Kormovye rasleniia senokosov i pastbishch SSSR,vol. 1. Edited by I. V. Larin. Moscow-Leningrad, 1950.
Nikitin, V. V. Sornaia rastitet’nost’ Turkmenii.Ashkhabad. 1957.
Kott, S. A. Sornye rasteniia i bor’ba s nimi,3rd ed. Moscow, 1961.

T. V. EGOROVA and V. V. NIKITIN

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
After I had pulled all the Johnson grass (which took me about four weeks), I was ready to tackle the rocks.
One gardener battling Johnson grass referred to this noxious perennial as "Bermuda grass on steroids." If you want to beat this weed, dig out an entire clump and lay it gently in a wheelbarrow or on your sidewalk without trying to knock off the soil.
Cover provided by grasses increased beyond springtime values; little bluestem up to 14% cover at 25 cm and 2% at 50 cm, and Johnson grass contributing up to 13% cover at 25 cm and 5% at 50 cm.
We detected Johnson grass on 54% of points on restored sites and 61% of points on exotic sites.
During the Fall 2001 sampling period, common cat-tail (Typha latifolia; 49.8%) and Bermuda grass (Cynodon dactylon; 12.7%) were the most important plants identified in the reference wetland, while frogfruit (Lippia nodiflora; 21.3%), Johnson grass (Sorghum halepense; 19.2%), and barnyard grass (Echinochloa muricata; 15.5%) were most important in the constructed wetland (Table 1).
Johnson Grass Sorghum halepense: This weed is like crab grass on steroids.
(Johnson grass; TAC 4381) is an introduced grass known also from adjacent Eastland, Erath, Hood, Jack, and Parker counties (Turner et al.
Table 1: Influence of various concentrations of leaf and root aqueous extracts made from Johnson grass on the germination of receptor medicinal plant seeds.

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