Dairy Science Commons^™

A Comparison Of Daughters Of Sires In Artificial Breeding At Different Levels Of Management, Richard C. Cook

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

One of the largest problems facing the successful dairyman of today is selection of proper sires to mate to his high producing cows. Many breeders and dairymen have the impression that proven sires will give the same increase in production regardless of the dam's production or the level of environment present. Even though sires come from high producing herds, some as high as 600 pounds of butterfat, the average production of all cows in the state of Utah remains at a much lower figure. The average for all cows in Utah is about 250 pounds of butterfat and the average …

Dairy Club 1960, South Dakota State College

Dairy Digest

No abstract provided.

Effects Of Reserpine (Serpasil) On Bloat, Edward P. Michalewicz

Electronic Theses and Dissertations

Farmers and ranchers have been faced with the problem of bloat for many centuries. Thus far there has been little concrete evidence form research in determining the cause, finding a cure or a preventive for bloat. Numerous preventives for bloat have been practically useless. Investigators have used oils and paraffin’s as prophylactic and therapeutic measure against legume bloat. Antibiotics have been used as preventatives with some success, antifoaming agents have little effect and are of short duration. Tranquilizers, a comparatively a new group of compounds, have produced spectacular results in combatting stress conditions in animals. The ideal effect of tranquilizers …

Cutting Costs In Calf Rearing, N A. Scott

Journal of the Department of Agriculture, Western Australia, Series 4

RAISING calves as herd replacements and as a sideline to provide added income is becoming increasingly popular.

This is particularly noticeable since the inception of the Artificial Breeding Scheme whereby farmers are at liberty to breed herd replacements from their most productive cows and use semen from beef breeds for the poorer types.

Foster-Mothering Of Calves, Maurice C. Cullity, K. W. Simes

Journal of the Department of Agriculture, Western Australia, Series 4

"SAVE those calves" is a slogan which has been used frequently in propaganda to reduce the slaughter of heifers when it is thought that the supply of replacement animals to our dairy herds might be unduly low.

Although there is no fear of this at present, the wastage of calves both heifers and bulls, in Western Australia is unduly large.

Bracken Poisoning In Cattle, P B. Lewis

Journal of the Department of Agriculture, Western Australia, Series 4

THE ingestion of bracken fern causes the death of numbers of young cattle in the South-West of Western Australia every year.

Early experimental work in the United Kingdom demonstrated that bracken contained an anti-Vitamin Bl factor called thiaminase which was thought to be the cause of the poisoning, but later work indicated that a bone marrow poisoning, not yet chemically identified, was responsible.

Zamia Palm Poisoning, F C. Wilkinson

Journal of the Department of Agriculture, Western Australia, Series 4

THE Zamia palm (Macrozamia Reidlei) is a common plant in the jarrah and karri forest country and on the coastal plains and is one of the earliest recorded Australian poison plants.

Brucellosis And Its Control With Strain 19 Vaccine, C R. Toop

Journal of the Department of Agriculture, Western Australia, Series 4

DAIRY farmers of a generation ago will not need to be reminded of the ravages of contagious abortion or of the need for the continued application of effective control measures.

Fifteen or 20 years ago this disease which we now call Brucellosis was rife throughout the dairying districts of the State and it exacted a heavy toll.

The "abortion storm" was a common occurrence and it was not unusual for 30 per cent., and sometimes considerably more, of the cows in a herd to lose their calves at about the sixth month of pregnancy.

Record Keeping On Dairy Farms, R A. Bettenay

Journal of the Department of Agriculture, Western Australia, Series 4

FARMING today is very much a business venture and the successful farmer is the one who is not only capable of doing the manual work, but who also has the ability to plan the work routine and determine which of the possible avenues is likely to bring the greatest financial return.

For this, and many other reasons, simple but adequate records must be kept by all dairy farmers.

Many types of records should be kept but if a routine is followed, a few moments' work each evening will suffice to keep things up to date.

Vibriosis, F C. Wilkinson

Journal of the Department of Agriculture, Western Australia, Series 4

AN all-too-common problem on dairy farms is the failure of cows to conceive at times which will ensure their calves being born at the desired season—when the cows can take full advantage of the flush of green feed or, in the case of wholemilk producers, at a time when the milk is most needed to maintain their quotas.

There are of course many causes of sterility in cattle but in a survey carried out by veterinarians D. Roberts and M. Sier in 1957, it was shown that vibriosis was the main cause in 75 per cent of the herds investigated.

The Problem Of Low Solids-Not-Fat In Milk, Laurence C. Snook

Journal of the Department of Agriculture, Western Australia, Series 4

TO the consumer of milk, the solids-not-fat fractions is of prime importance.

This contains the protein, the minerals and the milk-sugar which collectively make milk such a valuable and palatable food.

If we wish to encourage increased consumption of milk as a health food it is essential that quality must be maintained and if possible improved.

Producers and distributors must always remember that if maximum sales are to be obtained, the needs of the consumer must remain paramount.

Brucellosis Can Cause Contagious Abortion In Cattle And Undulant Fever In Man, F C. Wilkinson

Journal of the Department of Agriculture, Western Australia, Series 4

WHEN the cow, shown in the accompanying photograph, was purchased it had a small fluid-filled lump on the left knee.

The swelling did not appear to be painful but gradually increased in size until it assumed the proportions shown in the picture.

It was a typical case of "big-knee," one of the less common manifestations of Brucellosis—the disease commonly known as contagious abortion—and a blood test of the animal confirmed the diagnosis.

Can Heifers Be Fed Too Well?, Laurence C. Snook

Journal of the Department of Agriculture, Western Australia, Series 4

DURING recent years, emphasis has been given to the results of experiments conducted overseas, which appear to show that when heifers are generously fed, this reduces their ability to produce milk in later life.

As a result, some dairymen now believe that heifer calves should be kept lean rather than in prime condition.

It has become common to hear statements to the effect that generous feeding encourages calves to become "beefy," at the expense of the milk-producing attributes which are essential in a dairy cow.

Cattle Lice : Spray Now For Prevention, F C. Wilkinson

Journal of the Department of Agriculture, Western Australia, Series 4

ALTHOUGH lice infestation can occur in any season of the year, the heaviest infestations are found during the winter.

This build up of lice infestation normally starts in the autumn but if the cattle are treated by spraying at this period, the majority of the lice are killed and the build up is prevented.

Thus the old saying "Prevention is better than cure" certainly applies with regard to cattle lice.

Milk Fever (Hypocalcaemia) Of Cows, Department Of Agriculture, Western Australia

Journal of the Department of Agriculture, Western Australia, Series 4

THE condition known as milk fever is almost essentially a disease of highly productive adult milking cows at the time of calving.

It is characterised by a low blood calcium level causing a sudden general depression of consciousness of the cow and muscular paralysis.

Without treatment most cases result in the death of the cow.

A System For Making Selective Matings In Dairy Cattle, Basil Ralph Eastwood

Electronic Theses and Dissertations

The term “selective matings” implies the selection of a sire to breed to each female on an individual, rather than a group or herd basis. Mating systems, other than random mating, may be classed either as the mating of like to like or as the mating of unlikes. This likeness or unlikeness may be based either on blood relationship or on individual appearance. The advantage and limitations of each mating system have been well worked out on a theoretical basis, and some of system have been thoroughly tested by experimentation and in the field. In actual practice many breeders use …

The Production And Ingestion Of Antibodies In Milk, George Donald Marx

Electronic Theses and Dissertations

Since biblical times man has depended upon the cow for nourishment. The cow’s contribution to human and animal welfare has been tremendous. These contributions may be increased by artificially producing antibodies in milk. In view of recent experiments the established theory that antibodies cannot pass the intestinal wall after the animal is a few days of age may not be true. Much information has been gathered to support this theory. Since the mammary gland is capable of producing a considerable quantity of antibodies and since antibodies inhibit disease, the milk should be an excellent source of antibodies for disease protection …