The Cotton classification system is considered one of the most
important factors that has an effect on produced cotton yarns
quality, so we - in this research – have studied these items : the increased neps percentage phenomenon (state). the cotton
grades which recorded on the cotton bales. Detection of local cotton classification system accuracy and
efficiency. study of the possibility of application SOLVIOV
equation on Syrian cotton classification has been done certain
tests on cotton samples which have been taken from different
ginning centers and different bales.
The research was carried out during 2009 – 2010 in Al – Hasaka – Amoda – to study the effect of cattle manure at the rate of 30 ton/h1, and four organic green fertilizers (Lentil, Vetch, Faba bean and Barely) on plant area and earliness properties of
cotton crop compared with chemical fertilizer 400 kg/h1 urea, 83 kg/h1 P2O5 and 25 kg/h1 K2O.The study showed that the cattle manure significantly increased (plant area, lower first fruiting branch, earliness of flowering and boll maturity) when compared with all studied fertilizers, the increase reached (190. 92 Cm2, 0.30 pod, 1.50 day and 0.90 day) respectively. When compared with chemical fertilizer, the legume green fertilizers (Lentil, Vetch and Faba bean) significantly increased the plant area when compared with the control. The legume green fertilizer (Lentil) significantly increased the earliness of flowering (2.73) day and boll maturity (2.21) day when compared with the green fertilizer (Barely). The chemical fertilizer did not significantly affect the earliness of flowering and boll maturity when compared with the legume green fertilizer (Lentil) during the two seasons.
Seven cotton varieties ( Rakka5, Aleppo133, Aleppo90, Aleppo118 , Aleppo40,
Deir22, Line124) were grown in village Salhab ( Al-Ghab region , Hama) in 2012 using
randomized complete block design with three replications. were used to study estimation
of variance, broad sense heritability, genetic progress and correlation some of their
technological characters (Staple length mm, Length uniformity% , Fiber fineness
%(micronaire), trength Fiber(g/tex), Fiber elongation%, fiber maturity%), that’s to explore
potentials Genotypes in search region and put the numerous selectoral evidence in order to
obtain an additive and fast improve on the technological characters,
The study showed significant differences between in the studied genotypes, for
most of the considered traits.
The study suggested a variation of the values of Heritability, Genetic advance in the
characteristics technological of cotton., the highest Heritability of which was in the Staple
length and than trength Fiber, Fiber elongation , Fiber fineness, fiber maturity, Length
uniformity, characteristics where the inheritance degree reached (0.98, 0.97, 0.89,
0.80,0.75, 0.30) , genetic development% (1.03, 1.35, 0.36, 1.31,1.22, 0.11).
The results also showed a positive significant correlation between Staple length and
trength Fiber (r = 0.901**), also between Fiber elongation with fiber maturity and Length
uniformity ( r = 0.64**, r = 0.422**), and this gives us the area and ease of movement to
put the numerous selectoral evidence in order to improve the technological characters of
cotton.
Sahl Al-Ghab zone is characterized by the availability of natural and human
appropriate conditions for the cultivation of cotton, and it's one of the most desired
agricultural crops for export, in addition to the big need for local textile mills wi
th both of
its public and private sectors, and it's also one of the strategic and social crops. However,
between 2005-2013, cotton cultivation fell back in this region to be replaced mainly by
wheat in addition to other crops, and the main reasons for this decline is that there is no
proportionality between the price of cotton and production costs, as the price of the
kilogram of cotton rose from 31 S.P in 2005 to 100 S.P in 2013, while the price of the liter
of diesel – the main factor in the cultivation of cotton – rose from 25 S.P in 2005 to 60 S.P
in 2013.
Through this research, We knew the reasons for the decrement of cotton cultivation
in Sahl Al-Ghab zone and choosing the wheat and nothing else to replace it, especially that
wheat cultivation didn't achieve better economic returns of cotton.
On the contrary, it had negative results in terms of non-application of the agricultural
cycle and the spread of diseases such as wheat rust disease that spreaded in Sahl Al-Ghab
zone in the last years and which reflected negatively on production.
Seven cotton varieties (Rakka 5, Aleppo133, Aleppo 90, Aleppo 118, Aleppo 40,
Deir 22, and Line124) were used in the study of some quantitative characteristics of cotton
yield and its components (seed cotton weight per boll/g, 100seed/g weight aver
age, lint
percentage %, seed cotton weight per plant/g, total dry matter weight, seed cotton yield per
unit area kg/ha), and physiological qualities (leaf area cm2, leaf area index %). The seven
varieties were grown in Salhab (Al-Ghab region, Hama) in 2012 using randomized
complete block design with three replications.
The study included estimating variance, broad sense heritability, genetic progress,
and genetic correlation between cotton yield and its components, which is to be used in
breeding programs.
The research was carried out during the growing seasons of 2011 and 2012 to study
the effect of land leveling by laser, three tillage depths(01, 25 and 35cm) and three
irrigation systems with 7, 8, and 9 day intervals, along with the interactive ef
fect between
them on the yield of cotton (C.V Aleppo-90), irrigation management and net grossing. The
study showed the following results:
1- Land leveling by laser significantly increased the seed cotton yield, saved
irrigation water, and made net grossing higher as compared to no-leveling by laser through
the two seasons.
2- The two depths of tillage (25 and 35cm) significantly increased the seed
cotton yield, increased the irrigation water amount, and made net grossing higher as
compared to the depth of tillage (10cm)..
3- Increasing the irrigation water amount significantly increased the seed
cotton yield which reached 1441KG/H, and achieved higher grossing which reached 31360
S.P/H as compared to the lower irrigation water amount.
4- The interactive effect between the factors of this experiment gave a
significant positive difference. The best results were at (deep tillage 35cm × intervals 7
days × leveling by laser) through two seasons.
Seven cotton genotypes (Rkka5, Aleppo1-33, Aleppo90 – Aleppo 118,
Aleppo 40, Deir22, and Line124), were used to estimate variance and genetic
and phenotypic correlations between seed cotton productivity and its
components [earliness in flowering a
nd maturity(day), plant height (cm),
number of vegetative and reproductive branches, number of bolls per plant,
100 seed weight (g), average boll weight (g), lint percentage (%), and plant yield
(g)], to be used as selection indices for higher yield performance in breeding
programs. The experiment was carried out in Al-Ghab region (Hama) in 2012-
2013 growing season using randomized complete block design (RCBD) with
three replications.
This research aimed to use space image at certain growth stage for
predicting cotton yield in its direct physio-spectral relationship with
productivity. Timely, at the beginning of August better spectral growth stage is
coincidence with a maximum
leaf area index of cotton plants at Al-Kaltta fields.
Normalized difference vegetation index (NDVI) showed superiority on each of
red and near infrared channels in relation with productivity. Exponential
model was used to predict cotton productivity depending on NDVI values
during stage that maximum LAI.
The study was conducted in the eastern region of Syria to know the extent of
cultivation development of wheat and cotton production and the factors
affecting these crops during 1996-2010. The results showed that the effect of
time on the productio
n and productivity of wheat was not changed statistically,
while the cotton area was decreased significantly during the study period. The
total production of wheat was also affected significantly and positively by
cultivated area and planting costs per hectare, and negatively by purchase
price, while the production of cotton was affected significantly and positively by
costs and purchase prices. According to the geographical region, the results
showed that the production in the eastern region was significantly affected by
Al-Raqqa production for wheat and cotton crops and Al-Hassake production
for wheat crop. However, wheat productivity at Deir Ezzor was significantly
superior compared to Al-Raqqa and Al-Hassake. The study recommended
expanding the cultivation of wheat and cotton and support and expand the role
of agricultural extension.
Syrian agricultural sector is one of the most sectors which contribute to the
national economy, because it provides employment for about 50% of the Syrian
labor force. In addition to secure food and clothing to the citizens and the raw
materials f
or the national downstream industries and reduces the trade deficit.
The cotton crop is the most important strategic crop and where 18% of the
workforce are employed there, starting from the process of agriculture until the
delivery of the product to the consumers. In addition to, it is an export crop
which includes raw cotton ginned, spun and woven garments worth tens
billions of Syrian pounds. The cultivation of cotton is one of the most important
irrigated crop in Syria and the relative importance in the Syrian agriculture,
For these reasons, the study includes many agricultural aspects - productivity
also it depends on official statistical data analyzed and discussed according to
the approved scientific basis for such these kinds of studies. The econometrics
showed that production and area of cotton was decreased when the cost was
increased in spite of there were increases in researches which are done in the
fields of cotton.
