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Cotton is an important fiber crop of Pakistan and is also the
second most important oilseed crop in the world. The cotton plant
possesses a narrow range of ecological adaptability and is very
much influenced by the climatic conditions. Among many factors
causing low yield, sowing time and plant spacing are more
important. Therefore, the present study was designed to investigate
the effect of different sowing times and plant distances on the
growth, seed cotton yield and quality of cotton genotype BH-160
under the agro-ecological conditions of Rahim Yar Khan in irrigated
environment. It may be concluded from this study that the boll
number, boll weight and yield per plant decreased with closer
spacing but seed cotton yield per hectare increased. The 15 cm
plant to plant spacing produced more seed cotton yield due to more
number to of plants per hectare, which compensated the other, yield
components. Plants spacing however did not affect G.O.T%, seed
index and fibre quality and plant height. Sowing date of 15th May
gave maximum seed cotton yield and did not effect on monopodial
branches.
Phosphorus and Zn deficiencies are common nutritional restrictions
to crop production in the soils of Pakistan. The P-Zn interactions
in plants have been examined in the past but their interaction
effects on economic yield of crops are still confusing,
particularly in sandy clay loam soils. For these reasons, a field
experiment was laid out in RCBD-factorial with three replications.
It is concluded from this experiment that the treatment with 40 kg
P and 8 kg Zn ha-1 gave the best combination of phosphorus and zinc
levels at 100 kg N ha-1. It is also the most suitable from economic
point of view as it gave maximum benefit cost ratio and value cost
ratio along with high net income.
Pakistan is facing an acute shortage of edible oil. In order to
overcome the prevailing situation, there is a dire need to increase
per acre yield of non-conventional oilseed crops. Plant density and
nitrogen fertilizer levels are among factors affecting sunflower
yield and seed oil percentage. The interaction between plant
spacing and N rate significantly affected seed and oil yields. In
this context, the OILCROP-SUN model has been tested with sunflower
and results indicated that achene yield of sunflower hybrid
cultivar among various planting densities was related to their
photosynthetic activity. The data suggested that there is
considerable scope to exploit the yield potential of sunflower
hybrid with variable planting density and nitrogen rates, depending
upon the prevailing climatic conditions. It may be concluded from
this study that planting density of 8.33 plants m-2band nitrogen
rate N2, 125 kg ha-1 (recommended dose) is recommended for
achieving high yield under agro ecological conditions of
Faisalabad.
Ziziphus jujuba is the most commonly grown fruit in Pakistan,
having essential oil that can be utilized for the purposes of
preservation like jujuboside and other flavoniides. In Pakistan it
is used for the treatment of ulcers, wounds, eye diseases and
bronchitis. Antioxidants are naturally occurring or synthetic
substances which prevent oxidation or chemical reaction involving
oxygen. The main focus of this investigation was to study the
chemical constituents, antioxidant activity and phytochemicals
present in the Ziziphus jujuba L. The results indicated that
different extracts fractions from methanol, n-hexane, ethyl acetate
and chloroform ranges from 20 to 100% concentration indicated that
noticeable antioxidant properties were present in jujuba species
that were determined by spectrophotometric techniques. The maximum
antioxidant properties were observed in 100% chloroform and in M3
(60% methanol and 40% chloroform) and minimum were analyzed in E1
(20% ethyl acetate and 80% n-hexane) and M1 (20% methanol and 80%
chloroform). The extraction techniques and extracting solvent were
of great importance in this study that showed the extractability of
various solvent.
Meat and its products enjoy a unique status in human diet but meat
also serves as an excellent substrate for the growth of most
microorganisms, and is associated with hypertension and
cardiovascular disease due to the presence of high sodium and fat
contents. In the functional examination of minced beef patties,
estimation for total sodium contents is essential to assess the
level of risk. The minced beef patties were also treated with
chitosan-mint mixture to minimize the presence of microorganisms,
oxidation and to increase the shelf life of the product by acting
as a natural antioxidant as well as antimicrobial agent. The
recommendations from this research work are; the microbiological
quality of minced beef should be monitored regularly and properly
to ensure consumer's safety. Different formulations for patties can
be developed by using masking agents, cold pressure storage and use
of less quantity of beef to ensure lower amounts of Na contents.
Suitability of different oils and fats available for proper
structure and other quality parameters of patties should be checked
to ensure good quality products with lower levels of fat.
Soils of Pakistan have free CaCO3, alkaline pH and low organic
matter. Consequently, nutrient disorders seem among the most
critical factors of crop production, particularly in salt-affected
soils. The essentially of P and Zn for plants has been established
long ago but interaction effects on economic yields of crops are
still controversial. Wheat is the most important cereal crop in the
world. In a pot study on wheat grown on salt-affected soil, results
indicated that mean number of tillers per pot, height of fertile
tillers, straw dry weight, 1000-grain weight and P uptake in straw
was recorded maximum with control closely followed by T5 (P @ 150
kg ha-1 + Zn @ 10 kg ha-1) while Zn concentration was maximum in
straw and grains, P uptake by grains, Zn uptake by straw and grains
with P @ 150 kg ha-1 + Zn @ 10 kg ha-1. However, when P-Zn
interactions were investigated, it was observed that application of
150 kg P ha-1 & 10 kg Zn ha-1 could be the appropriate
fertilizer combination for significant increase in growth and yield
of wheat in salt-affected soil. Moreover, adverse effect of
salinity/sodicity can be minimized by increasing the fertility
status of the salt-affected soil.
In pakistan, Cotton crop is naturally vulnerable to many species of
arthropod pests, from the time of its germination to its final
picking. The use of chemicals as a pest control measure is a two
edged sword with both positive and negative impacts. The B. hebetor
wasp is a good biocontrol agent partly because it feeds rapidly and
has gut enzymes that quickly break down two major blood proteins in
moth larvae. The main objective of the present study was to screen
out the insecticides which were environment friendly, less
hazardous to health and least toxic to the laboratory reared
strains of natural enemies like Bracon hebetor (Say) Hymenoptera:
Braconidae). The results showed that Fenpropethrin was the most
toxic. Fenvalerate and Cyhalothrin were the least toxic, while
Deltamethrin and Bifenthrin were moderately toxic against Bracon
hebetor.
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