A field trail was conducted at Jeleen Research Station, Dara,a governorate,
Syria, during two consecutive growing seasons (2010/ 2011-2011/ 2012), in
order to evaluate the role of some cultural practices in improving nitrogen use
efficiency and gr
ains quality characteristics of four wheat varieties (Acsad1105,
Acsad1229, Acsad885 and Acsad901). The experiment was laid according to
randomized complete block design-split, with three replicates. Leaf area index,
grain starch content and grain yield were significantly higher during the first
growing season, in the wheat variety (Acsad901), for the first planting date, and
nitrogen rate (200 Kg N. ha1-), when nitrogen fertilizer was added in two splits
(1.25, 68.60 %, 1051 g. m-2).
This research was conducted at Abu Jerash farm, Faculty of Agriculture,
Damascus University during 2011/2012 season to assess the effect of different
doses and concentrations of physical and chemical mutagens on some
quantitative and qualitative t
raits in the second generation (M2) of two
varieties of durum wheat.
Results showed significant differences (p<0.05) between the varieties,
treatments and the mutual interactions. Bowhoth 9 was superior in the average
of total number of changes (16.59%) compared with Doma1 (13.29%). The
total number of qualitative changes in the varieties studied was 14 types of
change, alternated and varied in appearance with the different doses and
concentrations of mutagens used. Bowhoth9 was superior in the average of
grain`s number (238.84), grains weight (11.89g) and the one thousand grain`s
weight (58.35g) in comparison with the parallel counterparts of averages
174.31, 7.06g, 54.38g, respectively in Doma1.
Twenty two samples of black tea were collected from local Syrian markets
during 2009-2010 to study the quality characteristics of tea in terms of
moisture، water extract، caffeine، total ash، water soluble ash، alkalinity of
soluble ash, insoluble
ash in diluted hydrochloric acid in addition to
microscopic examination.
Results showed that all tested samples were identical to the Syrian Standard
No. 286/2003 for all above quality specifications، except for caffeine percent
which was less than the standard in 4 samples. The results also showed that
there was no adulteration with foreign plants nor exhausted tea leaves.
This investigation was carried out at the experimental Station of the College
of Agriculture and Veterinary Medicine, King Saud University, Al-Qassim,
Saudi Arabia, during the growing season 2001/2002. The objectives of the
research were to study
and evaluate the productivity, morphological and
physiological behavior of alfalfa (Medicago sativa L.) plants grown under palm
trees environment.
The results proved the important effects of palm trees shading on alfalfa
growth, development and productivity. Significant differences were observed
between the control treatment and the two other treatments. The results also
showed a significant increase in fresh and dry weight and quality
characteristics except for fat percentage. This percentage increased gradually
from treatment 1, which was located under palm trees, to treatment 2, which
was located between palm trees to the control treatment, which was located
away from palm trees, where there was no shading. The morphological and
physiological characteristics did not significantly change in spite of the existed
changes among their means.
