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| ARPN Journal of Agricultural and Biological
Science
February 2015 | Vol. 10 No. 2 |
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Title: |
Using
optimal control for tumor remedy and prevention of its
growth |
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Author (s): |
E.
Zanboori and A.
Fakharzade J. |
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Abstract: |
Tumor needs
angiogenesis for his growth naturally. One of the best way
for controlling tumor growth is prevention of tumor
angiogenesis. In optimum position, we can formulate this act
as an optimal control problem. In this paper, in the course
of description of model, we find optimum remedy by using
Embedding method for the first time. Numerical results show
the effect of this method for tumor remedy. |
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Title: |
An
appraisal of benzoic acid and sorgaab effect on weed
management and wheat (triticum aestivum l.) yield |
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Author (s): |
Muhammad
Aamir Iqbal, Qaiser Maqsood, Rana Nadeem Abbas, Asif Iqbal,
Sher Afzal and Nadeem Akbar |
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Abstract: |
A field
trial was conducted to evaluate the effect of benzoic acid
(an organic compound) and sorghum water extract (Sorgaab) at
the Agronomic Research Area, University of Agriculture
Faisalabad, during 2010-2011. Experiment was laid out in
randomized complete block design (RCBD) with three
replications. Benzoic acid and sorgaab were applied as
foliar spray, alone and in different combinations at 22 days
after sowing of wheat.
All the treatments increased wheat yield as compared to
control but the combined effect of benzoic acid and sorgaab
was more pronounced than their sole effect. The highest
grain yield (4.72 t ha-1) was recorded in plots
treated with benzoic acid applied @ 6 kg ha-1 +
sorgaab @ 12 L ha-1 (T8) which was 48%
higher than control. Application of benzoic acid
significantly affected all agronomic parameters as number of
productive tillers per plant, number of grains per spike,
1000-grain weight, grain yield, biological yield as well as
harvest index (HI) as compared to control. Significantly
less total weed density, weeds fresh weight and dry weight
were recorded in plots that were treated with 6 kg ha-1
+ sorgaab @ 12 L ha-1 (T8). |
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Title: |
Assessment of plant growth promoting rhizobacteria from
Jatropha curcas rhizosphere |
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Author (s): |
Viraj
Chaudhari and Meenu Saraf |
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Abstract: |
Plant
growth promoting rhizobacteria (PGPR) are able to colonize
all the ecological niches found on plant root and promotes
plant growth, have profound effects on productivity of
plants. In this study total 163 isolates were successfully
isolated from Jatropha curcas rhizosphere from two
distinctive sites of Gujarat state (India).Ten isolates were
screened on the basis of their fast growing ability,
motility and examined for production of indole acetic acid
(IAA), hydrogen cyanide (HCN), ammonia, exopolysaccharide
(EPS) and phosphate solubilisation. DN2, DP3, DR1, SP1 and
SAz1 showed good potential ability for plant growth
promotion. They were further studied for different salt
concentration, pH and temperature. DN2, DP3 and DR1 isolates
were grown best at 0.5% NaCl and 7 pH. SP1 and SAz1 isolates
were shown maximum growth at 1% NaCl and 9 pH. All five
isolates have excellent growth under the temperature of
37°C. It is expected that inoculation with these five
isolates DN2, DP3 & SP1 (Bacillus spp.), DR1 (Rhizobiums
pp.) and SAz1 (Azotobacterspp.) have positive
impact on plant root, shoot and yield of Jatropha curcas
under the field condition. |
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Title: |
Vulnerability to climate change of mangroves in Xuan Thuy National
Park, Vietnam |
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Author (s): |
Pham Hong
Tinh and Mai Sy Tuan |
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Abstract: |
To
quantitatively assess the vulnerability to climate change of
mangroves in Xuan Thuy National Park, mangrove cover change,
climate change, sea level rise, community awareness and
participation in the mangrove protection and rehabilitation
were measured, investigated and analyzed. The results
confirmed that in recent years mangroves in Xuan Thuy
National Park are not very vulnerable to climate change. For
instance the mangrove area has increased of about 600 ha
mangroves in the period 1995-2010 and the sedimentation rate
(10.4 mm/year) is much greater than the rate of sea level
rise (1.9 mm/year). This is explained that Xuan Thuy
National Park has good management mechanism with the
participation of many stakeholders, especially the active
participation of communities in the buffer zone in mangrove
protection and rehabilitation. The results also indicated
that mangroves in Xuan Thuy National Park could be more
vulnerable to climate change in the future due to decrease
of afforestation projects and the failure of landward,
seaward transgressions caused by seafood aquaculture and
seaward margin erosion. |
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Title: |
Physical-chemical evaluation of residues from the shiitake
mushroom production for the seedling germination in nursery |
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Author (s): |
Adriana
del Pilar Flores-Flores, José Antonio Rivera Tapia, Miguel
Ángel Hernández Espinosa, Conrado Parraguirre Lezama and
Omar Romero-Arenas |
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Abstract: |
The substrates most utilized for the
production of forest seedling in México are Peat and forest
soil; however, the high cost of the forest production,
creates the necessity and search for alternative substrates,
which must be capable of promoting healthy and good quality
plant. There are many byproducts of different productive
processes that can be used as a substitute for peat in
forest nurseries. The residues form the Shiitake mushroom
production (Lentinula edodes) has not yet been
characterized, therefore, it’s potential, as an alternative
substrate remains unknown. It was conducted a physical and
chemical characterization of the compost made from the
residues of Shiitake mushroom production as well as an
evaluation of the germination of Pinus Pseudostrobus
at nursery. The compost showed a 4.37% content of N, 0.904%
K, and 0.117% P, additionally it has a porosity of 30% among
other physical and chemical properties. After 30 days of
sowing, the plants that developed in the Shiitake compost
50%+vermiculite 25%+perlite 25%, presented a 92% of
seedling, which was higher than the control treatment (Peat
Moss 33%+vermiculite 33%+perlite 33%). From the results
obtained, it is proposed that the substrate based on the
compost from cultivation of Shiitake, allows a high
germination rate contributing to the forestry sector. |
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Title: |
An
continuously-variable, multiple engines solution for
tractors |
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Author (s): |
Luca
Piancastelli and Leonardo Frizziero |
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Abstract: |
In modern heavy duty and agricultural
vehicles the Continuous Variable Transmission (CVT) is
highly requested. However, the implementation of the concept
is not so easy. Many solutions were patented in last two
centuries to solve the problem. Many are based on planetary
gearings. In the recent years the introduction of hybrid
light-duty vehicles with power split planetary CVT has
revolutionized the market, reviving the interest in the
solution. This paper is aimed to introduce a new concept of
CVT dual drive with multiple speed controlled engines. The
example of a dual drive CVT with four common rail engine is
detailed. |
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Title: |
Effects
of sowing date and pre-treatment methods on seed emergence
and yield of yarrow (Achillea santolina) |
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Author (s): |
Bahram
MIRSHEKARI and Reza SIYAMI |
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Abstract: |
There is a little
information about influence of physical seed treatment
methods on yielding potential of medicinal plants. The
present study was conducted to improvement of seed emergence
and yield of yarrow by physical treatments especially in
late sowing date. The experiment was conducted at Tabriz,
Iran. The yarrow seeds were treated by ultrasonication,
laser, magnetic field, gamma and beta irradiations all for
3.5 and 5 min. In the field study seeds were hand sown on
5th and 20th May. LSD test (P=0.05) was used to compare the
differences among treatment means. All the seed priming
treatments improved the coefficient of uniformity of
emergence The effect of studied treatments on final
emergence percentage was significant. Seedling vigor index
from seeds treated with gamma and beta irradiations was
found to be similar to that of control. When seeds were sown
on 5th and 20th May, harvesting stage in the plots treated
under magnetic field and ultrasonic happened 101 and 88.8
days after sowing respectively. There is no significant
difference between biological yields of yarrow from sowing
dates of 5th and 20th May. Seeds priming by ultrasonic wave
and magnetic field is recommended for improving crop
performance and yield in delayed sown plants. |
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