الفهرس 
REVIEW OF LITERATUREOnly 14 pages are availabe for public view
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Abstract
Soybean is one of the most important leguminous crops all over
the world. The importance of this crop is raising from its high nutritional
value. For instance, it contains about 20 % oil and 40”6 high quality protein.
Therefore, it is an excellent source for human and animal nutrition.
lncreasing the production of soybean is of great importance, 1> hich
may be achieved by using high yielding varieties and/or improving the
agronomic practices among which ,,•eed control. The use of herbicidal in Egypt
increased rapidly in recent years and -..:ill continue to increase in the future
since the comparison between cost of v:eed control by handitional means
and the use of herbicides is moving more and more in favour of the latter.
In Egypt, its often to irrigate land before preparing seed bed to
stimulate ,,·eed seed to germinate before planting the crop. \reeds u:hich
germinate before crop SO’-”ing can be easily eradicated by farm practices
or by chemicals. Early elimination of ”-’eeds ,..ill minimize competition
of weeds with the crop seedlings and consequently improve gro,.·th and yield
of crop plants. !reeds which may emerge after treatment can be follo,.·ed
”-’ith hoeing or suitable heribicide to obtain good ,,·eed control throughout
the growing season.
Combination of various chemicals are made to broaden the spectrum
of weed control and sometimes the dosage of any one herbicide can be
reduced. By compounds that are effective on different species, it is possible to use the minimum amount of each that kills the most sensitive species.
This is especially important when one of the chemicals is very expensive or when they persist long in the soil thus may cause damage to the following
crops or leave undesirable residues in the foliage or fruit.
The objective of the present investigation was to study the efficiency
of some chemical and mechanical weed control patterns under the common
method of soybean planting on v:eeds as v:ell as gro”·th, nodulation, yield
and yield components of soybean plants.