Tài liệu miễn phí Tiếng Anh thương mại
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The ability of camels to go for varying periods of time without water is a major factor in
placing the family camp and camel herd in relation to sources of water. This ability is
affected by several factors such as how much work (including walking in search of its
feed) the camel has to do and the ambient temperature. Camels spend more energy
(involving the use of water for evaporative cooling) at high temperatures, increasing thus
the need for water and reducing the time between waterings. The management
implications of this are that camels should be provided with shade,...
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During dry seasons when the surface water disappears and the vegetation dries up, camels
have to be watered from subterranean sources such as man made water holes, old wells
etc. In highly arid areas as in Eastern Africa, watering camels in dry season is a very time
consuming and arduous job since water has to be lifted bucket by bucket from several
metres deep wells. However, in various countries, state agencies are providing more
water-holes, deep bore holes (tube wells) with motor or wind driven pumps and supply of
water through large tankers when there is a prolonged drought. Camel...
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The absence of coordinated systems for data collection and record-keeping and the
maintenance of databases for the livestock sector, including a mechanism for feedback and
exchange among the stakeholders for development of livestock-related policies have been
identified as a major constraint for many countries in SAP. Such data recording, even on a
limited scale, is critical for genetic improvement of livestock.
Partially due to the paucity of data upon which to base policies and selection
decisions, the lack of planned breeding programmes is highlighted in most of the countries in
the SAP region [4]. Many countries have adopted policies...
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Policies on breeding and crossbreeding often vary across countries and are prone to
change within country at each election of a new government. Tepid and variable
commitments of government to long term breeding programmes have been identified as an
additional constraint in sustainability of genetic improvement. Little coordination and poor
linkage among government agencies and other stakeholders, little access to technologies and
meagre training on animal breeding for technicians has influenced the rate of genetic gain
further. Necessity of conserving local genetic resources is yet to be considered in many
countries. Breed conservation should be recognized realizing that some valuable...
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Breeding objectives for improving the productivity of or conserving particular breeds
or genetic groups of livestock depend upon many factors. Among these factors are the
agro-climatic conditions of the area of inhabitation (including endemic diseases), agricultural
and livestock systems in vogue, availability of feedstuffs — including crop by-products, herd
size, marketing structure and locally available animal genetic resources, socio-cultural and
economic level of the livestock owners, available infrastructure and facilities, desire and
capabilities of farmers and the political and administrative will of the state to bring about
change in animal productivity to improve the living...
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Ideally, multiple traits would be considered for selection, such as milk yield, AFC and
longevity, to consider both production and functionality. Such a plan might be difficult to
implement quickly, so, for more simplicity, evaluation could initially be based on ‘likeability’
scores assigned by the farmer. To evaluate likeability, farmers would be asked to assign an
animal a score of from 1 to 5, where 1 and 5 indicate an extremely poor or good cow,
respectively. Such a trait would comprise a mixture of productivity, reproduction and health.
Studies have shown that such a trait has a heritability near...
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The 2005 ARMS dairy version also included a sub-sample targeting organic operations. Of the
total dairy sample of 2,987 farms, 737 samples were targeted at organic operations in 19 states
nationwide as identified from lists provided by the major organic milk processors and certifiers.
After accounting for non-response and missing data, information on 1,814 farms, including 352
operations producing certified organic milk in 16 states, was available for the analysis. Among
the organic dairies, 325 sold more than 90 percent of milk production as certified organic, while
the other operations were either in transition to organic...
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The Ethiopian Boran breed is one of the cattle breeds widely used in Ethiopia. The breed
is well adapted to semi-arid tropical conditions, has a high degree of heat tolerance, is
tolerant to many of the diseases prevailing in the tropics and has the ability to survive
long periods of feed and water shortage (Ojango et al. 2006). These properties have
genetic basis and have been acquired by natural and human selection over generations.
They are all essential for successful animal production in the tropics. While only their
superior beef production potential has been the focus of research in many...
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The climate in Western Australia is predominately Mediterranean and as a result the winter
rainfall from May to August provides for grass growth in the months of June through to
November (Figure 1). However, there is a resulting shortfall in grass growth for the
remaining months of the year which must be addressed. This pattern of grass growth is not
adequate to feed a cow for her entire lactation. Alternatives to grass growth such as irrigated
pasture are limited due to competition for scarce urban water supplies, the increasing energy
costs of...
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In Western Australia silage made from rye grass is the predominant summer feed for cows. It
is most commonly mixed with cheap grain and to date this has proved to be an economical
feed option. The primary advantage of this type of silage is that it improves pasture
utilisation by conserving surplus pasture which is able to be fed out when there is a forage
deficit.
However, the disadvantage of this type of silage can be inconsistencies in its quality. The
inconsistencies arise when excess pasture is preserved at different times during...
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In North America, dairy farmers base the majority of their cow feed rations around corn
(maize) silage. Corn is a popular North American crop and underlies a large proportion of
their Agricultural economy. The main advantage of corn silage is its high starch levels as
starch improves the energy content of the diet. High starch forages are seen as a desirable
characteristic in North American dairy feed systems. When corn is not available, forages are
made with cereal crops such as wheat and barley. In order to maximise starch levels in wheat
or...
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Ruminant Animals is a first semester course. It is a year one credit unit diploma
course available to all students offering Post Graduate Diploma in Agricultural
Extension and Management. It may also be taken by students who wish to know
more about Agricultural Extension and Management.
The course will consist of sixteen units which consists of Course Guide. Importance
of ruminant animals in Nigeria, digestion in ruminants, classes of ruminants, feeding
and management of sheep and goats, housing, measures for disease prevention,
diseases and parasites of small ruminants and cattle breeds, management of beef and
dairy cattle...
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This course guide tells you briefly what the course is about. What course materials
you will be suing and how you can work your way through these materials. In
addition, it suggest some general guidelines for the amount of time you are likely to
spend on each unit of the course in order to complete it successfully.
It gives you guidance in respect of your Tutor Marked Assignments, which will be
made available in the assignment file. There will be regular tutorial classes that are
related to the course. It is advisable for you to attend...
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The first unit focuses on the definition of non-ruminant and the examples of animals
classified as ruminants. The second, third and fourth units centers on the different
classes of small ruminants. For each class its origin and domestication has been
discussed. Breeds belonging to each class are described as well as the breeding of
these animals.
Unit five deals with feeding and breeding management of sheep and goat. The
different houses that can be constructed for sheep and goats as well as the equipment
necessary in a sheep and goat farm. Units 7 and 8 deal...
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There are eight hours tutor-marked assignment in this course. You only need to
submit five of the eight assignments. You are encouraged, however, to submit all
eight assignments in which case the highest five of the eight marks will be counted.
Each assignment counts 10% towards your total course mark.
Assignments questions for the units in this course are contained in the assignment
file. You will be able to complete your assignment from the information and
materials contained in your reading, references and study units. However, it is
desirable in all degree level of education to demonstrate...
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The RRL also conducts analysis of r-value or vaccine matching of field isolates in
comparison with relevant vaccine strains. In terms of serology, the RRL routinely uses liquid
phase blocking (LP) and non structure protein (NSP) ELISA. It has been involved in several
validation tests conducted for NSP ELISA under the IAEA Project. In addition, the RRL
routinely produces and supplies the FMD diagnostic reagents to laboratories both within
Thailand as well as SEAFMD countries.
The RRL provides a substantial regional role in diagnostics, training, quality standards and
harmonization of methods. It has conducted several on-the-job trainings and...
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The FAO projects, through supporting virological surveillance, assisted identifying in
Pakistan the Asia-1 strain not matched to the Shamir vaccine; the early warning to WELNET
assisted when the first evidence of spread to the west was detected, and willingness to share
isolates assisted in vaccine development (FMD Institute Ankara) for local use.
The Roadmap assessment and peer review system has encouraged reporting of serological
findings but FMD remains highly sensitive and the move towards open and transparent
reporting of findings across the region is a challenge.
...
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In India, Foot and Mouth Disease (FMD) research started in the then Imperial
Bacteriological Laboratory at Mukteswar as early as in 1929. The work on the production of
vaccines using cell culture technique commenced at Mukteswar in early sixties initially in goat
kidney/calf kidney cell cultures and subsequently by 1971-72 with the availability of the BHK
21 cell line in monolayer cultures. With the increased demand for the FMD vaccines, the
Bangalore campus of IVRI was established in 1972 with the objective of large scale
production in fermenters. This plant became fully operational by 1980 and the production...
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It is expected that by the year 2015, the country will produce about 600 - 800 million
doses of trivalent vaccine annually. In Asia as a whole, well organized production facilities are
available and several countries in the region source the vaccine from India. Keeping abreast
with the contemporary developments research efforts are going on in addressing the major
challenge of increasing the duration of immunity and development of new generation
vaccines. The salient research accomplishments in the development and application of FMD
vaccines in India are described here. ...
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Feeds can contain both high and low water percentages. Examples of feeds with high water
contents are young grass (± 15% DM) and cabbage (
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Ruminants, such as dairy cows, can very well utilize NPN (see Chapter 2). Hence, instead of
feeding dairy cows expensive (true) protein, cheaper sources of nitrogen can be used as well.
Urea which is relatively cheap chemical product, is such a non-protein nitrogen. However,
certain precautionary rules must be observed when feeding non-protein nitrogen to dairy
cows. It should be realized, that NPN (urea) can only be used in low level production systems
with high amounts of poor quality roughage. In feeding high yielding dairy cows, this NPN
does not play a significant role. In case the ration is...
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Carbohydrates are sugars and starches derived from cereals, tubers, roots, and other
substances such as cellulose and lignin from plant cell walls, vessels and woody tissues.
Carbohydrates do mainly provide energy for maintenance and production. A surplus of
energy is stored as body fat.
A part of the carbohydrates is crude fibre (CF), the remaining is nitrogen-free extract (NFE).
The latter consists of sugars, starches and sugar-like substances. Sugars and starches are
much easier to digest than CF. CF is very important for the functioning of the rumen and for
production of milk rich in butterfat. Food for dairy...
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Product evaluation is an important part of brewing, whether performed informally or formally and
whether the product is from a commercial or home brewery. Formal beer evaluation serves three
primary purposes in the context of brewing competitions. First, the beer evaluations provide feedback to
the brewer concerning how well an individual recipe represents its intended beer style. This feedback
can be useful as recipes are fine-tuned and attempts are made to improve the beer. Second, beer
evaluations may provide brewers with troubleshooting advice. These diagnostic suggestions are
particularly helpful when the brewer cannot identify the source of off-flavors or aromas....
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A second important condition that is necessary for effective beer evaluation is suitable equipment. That
is, judges need sharp mechanical pencils with erasers—mechanical so that the aroma of wood does not
interfere with detecting beer aromas and erasers so that comments and scores can be changed. Beer
judges also need suitable cups for sampling the beer—impeccably clean plastic or glass, odor-free, and
clear. Also, judges need access to style guidelines. Tables should be equipped with water and bread or
crackers for palate cleansing, buckets and towels for cleaning spills or gushes, bottle openers and cork
screws, and coolers and temporary...
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As for the presentation of beers, two methods are common, each with positive and negative points. One
method of presentation permits judges to open and pour the beer into their own cups. A second method
of presentation requires stewards to pour beer into pitchers, and the beer is transferred from the pitcher
into judges’ cups. When judges are allowed to pour their own beers, there is some danger that moving
bottles to the evaluation table will stir up yeast and that judges’ opinions of a beer’s quality will be
influenced by the appearance of the bottles that it comes in....
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There are two general decision making strategies that judges use when evaluating a beer. In a top-down
decision making strategy, the judge forms an overall impression about the quality of the beer, decides
what overall score to assign that beer, and deducts points for each deficient characteristic of the beer
based on the overall impression. The problem with this top-down approach to beer evaluation is that it
is difficult to ensure that the points allocated to each subcategory (e.g., aroma, appearance, flavor,
body) agree with the comments that were made about that feature of the beer. In a bottom-up decision...
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Most judges use a combination of these two extremes. Regardless of which approach seems more
comfortable to an individual beer judge, there are several general guidelines that judges should follow
when assigning scores to beers. In the current BJCP scoring systems, each beer is evaluated on a 50-
point scale, allocating 12 points for Aroma, 3 for Appearance, 20 for Flavor, 5 for Mouthfeel and 10 for
Overall Impression. This scoresheet can be found on the BJCP website. In addition, there are sliding
scales on the bottom right hand corner for rating the stylistic accuracy, technical merit and intangibles of
each...
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In general, the best beers at a competition should be assigned scores in the 40+ range, with real
evaluations of the beer identifying some characteristics of the beer that make it non-perfect. A beer
receiving a perfect score of 50 must indeed be perfect; it must have absolutely no flaws, exemplify the
style as well as or better than the best commercial examples, be perfectly brewery-fresh, and be well-
handled and presented. These conditions might not all be under the brewer’s control, so achieving a
perfect beer at the point of presentation to judges is extremely rare. ...
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When providing feedback about very good beers, it is important to identify ways in which the beer can
be improved and mention these characteristics on the scoresheet. Any serious flaw or missing aspect of
a particular beer style (such as lack of clove character in a Bavarian weizen) generally results in a
maximum score around 30. Also, note the cut-off score of 21 determines if a beer adequately represents
a particular style.
A beer that is strongly infected or that contains a flaw so severe that it makes the beer undrinkable can
be assigned a score of 13. A...
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Visually inspect the beer. Give your nose a rest, and score the appearance of the beer. Tilt the
cup, and examine it through backlighting. For darker beers, it may be necessary to use a small
flashlight to adequately illuminate the beer. Examine the beer’s color, clarity, and head
(retention, color, and texture). Write comments about the degree to which the color, clarity, and
head are appropriate for the intended style and record a score. Score the beer for appearance,
allocating a maximum of one point for each of these characteristics. ...
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