|
|
| Journal of Agricultural and
Biological Science
March 2007 | Vol. 2 No. 2 |
|
Title: |
Identification on suitable
rice variety adaptability to aerobic irrigation |
|
Author (s): |
G. James Martin, P. K.
Padmanathan and E. Subramanian |
|
Abstract: |
A field experiment was
conducted at Central Farm, Tamil Nadu Agricultural University,
Coimbatore to screen suitable rice varieties for aerobic rice
cultivation. 12 rice varieties viz., ADT 38, ADT 39, ADT 43, ADT 46, CO
43, CO 45, CO 46, CO 47, White Ponni, PMK 3, MDU3 and ADS 16 were
evaluated in randomized block design with three replications. The upland
rice variety PMK 3 produced the highest grain yield of 3684kg ha-1 and
it was significantly superior to other rice varieties. The next best
variety was ASD 16 (3138kg ha-1) and it was on par with MDU 3 (2943kg
ha-1) and CO 43 (2805kg ha-1). The water productivity varied among the
varieties depending upon their field duration. The combined amount of
effective rainfall and irrigation water from sowing to harvest varied
from 520 to 650 mm, compared with 1200-1300mm in lowland rice. The
variety PMK 3 with duration of 137 days registered the highest water
productivity of 7.06kg rice per ha mm of water. White Ponni, which
matured in 184 days, recorded the lowest water productivity of 1.5kg of
rice per ha mm of water. The second best variety was ASD 16 (5.79).
Compared with lowland rice, water consumption in aerobic rice was lower
than 50% and water productivity was 60% higher. |
| |
|
|
|
Title: |
Effect of applied
calcium-boron ratio on the accumulation of nutrient-elements by radish
(Raphanus sativus L.)
|
|
Author (s): |
M. Tariq and C. J. B. Mott |
|
Abstract: |
The present study was
based on the hypothesis whether applied Ca/B ratio has an association
with other plant nutrients. A green house study was carried out in sandy
heath land soil, growing radish (cv. French breakfast) as a test crop.
The experiment was laid out in a randomized complete block design and
replicated three times. Different Ca/B ratios were applied 2000:1,
1000:1, 500:1, 250:1, 125:1 and 25:1, corresponding to soil solution
ratios 7959:1, 4369:1, 1035:1, 851:1, 486:1 and 45:1 along with a basal
dose of all essential nutrients. Significant treatment effects were
observed in the growth response of radish and maximum dry matter yield
of tops and roots were recorded at Ca/B ratio of 1035:1 in soil solution
or applied 500:1. Results further revealed that B deficiency and
toxicity symptoms were clearly apparent on plant leaves when the radish
plants received higher and lower Ca/B ratios, respectively. However, no
visible symptoms of other nutrients were found on plants during growth.
The concentrations of P, K, Ca, Mg, Na, Mn and B in plants were
significantly affected, while the total uptake of all nutrients were
significantly changed due to Ca/B ratios in soil, in terms of applied or
in soil solution, and showed close similarity to growth response.
Correlation between Ca/B ratios and the concentrations of P, Ca, Mg, Na,
Cu, Fe, Mo and B attained statistical significance, while in case of
total uptake only N, P and Na showed significance, suggesting Ca/B
ratios have some association with the other plant nutrients. It appears
from the present study that no single or narrow range of Ca/B ratios in
soil, whether applied or in soil solution is best for the concentration
and total uptake of plant nutrients studied. However, considering the
test soil from sandy heath land and the radish crop it seems that the
best Ca/B ratios for the concentration and total uptake of nutrients
ranged from 1000:1 to 500:1, corresponding to soil solution ratios
ranged from 4369:1 to 1035:1. However, the role of Ca/B ratio on the
behavior of plant nutrients is still not well defined, and further
experimentations are desirable in this field. |
| |
|
|
|
Title: |
The role of intercropping
on yield potential of common vetch (Vicia sativa L.)/oat (Avena sativa
L.) cultivated in pure stand and mixtures |
|
Author (s): |
Canan TUNA and Adnan ORAK |
|
Abstract: |
The present experiment
was conducted under the ecological conditions of Tekirdag, Turkey during
1999-2001. Three levels of different mixtures vetch (Vicia sativa L.)
and oat (Avena sativa L.) (25% vetch + 75% oat, 50% vetch + 50% oat,
75% vetch + 25% oat) and pure common vetch (100% vetch + 0% oat), pure
oat (0% vetch + 100% oat) were used as experimental treatments. The
objective of this research study was to determine the effects of
different mixtures ratio on yield and yield components of common vetch (Vicia
sativa L.) + oat (Avena sativa L.). Seeds were broadcasted at a rate of
180kg ha-1 for the grasses and 120kg ha-1 for the vetch. Field trials
were arranged in a randomised complete block design with three
replications. Plant height, number of branch per plant, number of pods
per plant, herbage yield and dry matter yield were recorded. The two
years’ results showed that the highest and dry herbage yields were
obtained from 25% vetch (Vicia sativa L.) + 75% oat (Avena sativa L.).
As a result, the best mixture was 25% vetch (Vicia sativa L.) + 75% oat
(Avena sativa L.). By this mixture, 25.3 t/ha herbage yield and 6.5 t/ha
dry matter yields were taken. |
| |
|
|
|
Title: |
Storage stability of
persimmon fruits (Diospyros Kaki) stored in different packaging
materials |
|
Author (s): |
Dilawar Khan, Arbab Riaz
Khan, Saiqa Bibi, Sajid Ali and Iqtidar A. Khalil |
|
Abstract: |
An experiment was
conducted to evaluate the storage stability of persimmon (Diospyros
kaki) fruits in different packaging materials, at NWFP Agricultural
University, Peshawar. Evaluation was made for changes in chemical
characteristics of the fruit during three storage intervals packaged in
seven different packaging materials. pH, TSS (0brix), acidity
percentage and moisture percentage were determined at five days
interval after storage for three intervals. pH was non-significantly
affected during storage intervals, while TSS was recorded to be
increased. Acidity percentage was first increased and then decreased
during storage. Fruits packaged in rice paper showed considerable
decrease in pH, TSS (0brix) and acidity percentage while an increase was
observed for moisture content. However, the effect of other packaging
materials was almost non-significant on the tested parameters during our
study. |
| |
|
|
|
|
|
|
|
