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Keep Your Pigs Cool, P C. Beck

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

CORRECT MANAGEMENT and husbandry of pigs during the hot summer experienced in Western Australia is of the utmost importance if production is to be maintained at a profitable level.

Entyloma Leaf Spot Of English Marigold, R F. Doepel

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

THE English Marigold or Calendula is a hardy ornamental which is widely grown in gardens throughout Western Australia.

In recent years a serious fungal disease known as entyloma leaf spot has become established in home plantings.

Minerals For Livestock : Shotgun Licks : A Waste Of Money, Laurence C. Snook

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

Think carefully before buying proprietary "shotgun" licks, warns Animal Nutrition Officer Dr. L C. Snook in this article.

Many of these licks contain a variety of minerals not needed by stock in Western Australia, and misleading claims are sometimes made as to their value.

Dr. Snook concludes that only three minerals are needed in this State, and gives a recipe for a cheap all-purpose lick containing them.

Rearing Orphan Lambs, Laurence C. Snook

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

Orphan lambs are easy to rear if a few basic principles are understood.

Delayed Foliation In Apple Trees, J E L Cripps

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

DELAYED foliation refers to the late leafing out and production of small leaves by fruit trees.

However, the weak and protracted blossoming which precedes the appearance of the leaves has more serious consequences for it may lead to a reduced set of fruit.

Take Care Of Young Fruit Trees, R G. Cahill

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

Young fruit trees need good care if they are to grow well and produce good crops in later years.

Bridgetown Horticultural Instructor, R. G. Cahill, gives these hints for orchardists establishing young trees.

Although they take little effort to put into practice they will pay off well in the future.

Water For Agriculture. 3. Watering Plants With Salty Water, Stanley Thomas Smith

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

In Western Australia it is often necessary to use saline water for irrigation and gardening because of the lack of better water.

Two factors influence the results achieved. One is the selection of suitable plants, the other is the way in which the water is used.

Stress Factors In Pig Raising, P C. Beck

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

THE pig raiser who wishes to attain the best possible growth performance from his pigs must recognise factors other than the basic ones of good nutrition and bredin capacity.

These are "stress factors"—minor factors of husbandry which can greatly damage health and limit the growth rate.

Root Diseases In Wheat On Clover Ley : Factors Under Investigation. 4. Seed Bed Preparation, S C. Chambers

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

The occurrence of root rots in wheat crops in relation to seed bed preparation was studied in a series of field experiments.

Results suggest depth of cultivation has little effect upon the incidence of root diseases.

Ploughing of the seed bed reduced the amount of root rot compared with scarifying and also gave higher yields.

However, the increased yield appears to be mainly due to better control of weeds.

Mulesing And Tailstripping : For The Prevention Of Fly-Strike, W L. Mcgarry

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

MULESING and tailstripping are basic to fly strike control.

During emergencies and bad fly waves they may need to be supplemented by temporary protective measures such as jetting and crutching.

The Pruning Of Fruit Trees : Deciduous Fruit Trees (Japanese Plums) (European Or English Plums), H R. Powell

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

Many varieties of Japanese plums are grown in this State, the main ones being Santa Rosa, Ruby Blood, Satsuma, Delaware, Wickson, Narrabeen, Elizabeth, Beauty and Wilson.

Malic Dehydrogenase Activity At 101 C Under Hydrostatic Pressure, Richard Y. Morita, Roger D. Haight

Papers in Microbiology

MORITA, RICHARD Y. (University of Nebraska, Lincoln) AND ROGER D. HAIGHT. Malic dehydrogenase activitv at 101 C under hydrostatic pressure. J. Bacteriol. 83:1341-1346. 1962.-No malic dehydrogenase activity was found to occur at 101 C at various hydrostatic pressures from 1 to 700 atm. However, activity was demonstrated with hydrostatic pressures above 700 atm, with optimal activity at 1,300 atm at the same temperature. Explanation of the data is based upon thermal denaturation of the enzyme, which involves a molecular volume increase of the enzyme. The molecular volume increase is counteracted by hydrostatic pressure. Pressures above 700 atm to 1,500 atm …

Interaction Between The Parameters Of Hydrostatic Pressure And Temperature On Aspartase Of Escherichia Coli, Roger D. Haight, Richard Y. Morita

Papers in Microbiology

HAIGHT, ROGER D. (University of Nebraska, Lincoln) AND RICHARD Y. MORITA. Interaction between the parameters of hydrostatic pressure and temperature on aspartase of Escherichia coli. J. Bacteriol. 83:112-120. 1962.-The data obtained from studies of an aspartase preparation and aspartase in cells of Escherichia coli indicate that there is an interaction between the parameters of hydrostatic pressure and temperature. Pressure was found to decrease aspartase activity at 45 C and lower in vitro and below 53 C in vivo, thereby indicating that when the enzymesubstrate complex is formed there is an increase in molecular volume which is counteracted by pressure. Above …

Evaluation Of Sires Available Through Planned Mating, L. Dale Van Vleck, C. R. Henderson, H. W. Carter

Department of Animal Science: Faculty Publications

There is some concern that methods of sire evaluation which utilize contemporary stablemate averages can be biased by differential genetic merit of the mates of these sires. A little reflection, however, indicates that even if the cows to which some sires are mated are more highly selected than the mates of other sires, this differential merit will not affect seriously the ranking of sires according to the evaluation of their progeny. Until the present, data have not been readily available with which to study the seriousness of this problem. The present study does not deal with the question generally, but …

Sire Evaluation From Five-Month Daughter Records, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

The chief advantages of sire evaluation based on five-month daughter records are: 1. Genetic progress is inversely proportional to the turnover rate in testing bulls so that if this interval is shortened by 10%, the rate of genetic progress will be increased by 11%. The turnover period can be shortened with the use of 5-month records from about 50 months to 45 months—a decrease of 10% in time. 2. Genetic progress is also related to how many top bulls are saved and how many poor ones are culled out of all those sampled. In other words, the more bulls tested …

Silage Competitions In The South-West : 1960-1961, Department Of Agriculture, Western Australia

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

Review and results of the 1960-61 Australian Dairy Produce Board Silage Competition, and an outline of the 1961-62 Competition.

Frost Injury Of Wheat, S C. Chambers

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

Late spring frosts commonly reduce yields and affect the quality of grain in many wheat crops- especially throughout the southern, eastern and north-eastern districts.

The damage is usually localised on individual farms, but occasionally widespread damage occurs in the south of the State.

Wimmera Rye Grass : Major Pasture Grass Of The Cereal And Sheep Areas, H G. Cariss

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

MANY of the volunteer pasture species of the cereal and sheep areas seed profusely, persist well and produce useful early green feed.

Mostly, however, they produce poor quality herbage of low forage value, particularly during the spring and summer months.

The seeds of many species cause problems in stock husbandry and lower the value of wool.

Facial Eczema In West Australian Sheep, M R. Gardiner, M. Nairn

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

SINCE 1894 when the disease was first described in New Zealand, the term "facial eczema" has been used to describe a specific photosensitization of sheep in that country.

Reply To Dr. L.B. Holthuis On The Names Of White Shrimp, Gordon Gunter

Gulf and Caribbean Research

As an explanation to the reader it should be stated that my paper was submitted to Doctor Holthuis for Crustaceana. He asked me to withdraw it and I did so saying that I would publish it elsewhere. He then asked me to publish his remarks along with it, to which I agreed, and they are given above. However, his interpretations and ideas in this instance are contrary to the International Code of Zoological Nomenclature. Therefore, I have prepared the following rebuttal.

On The Names Of Penaeus Setiferus (L.) And Penaeus Schmitti Burkenroad, L.B. Holthuis

Gulf and Caribbean Research

Dr. Gordon Gunter, who sent me the manuscript of his paper “Specific Names of the Atlantic American White Shrimp (Family Penaeidae)” for comment was so kind to allow me to have my reactions to it published simultaneously with it. Unfortunately I cannot agree with Doctor Gunter’s views on the scientific names that should be used for the two Atlantic species of White Shrimp.

In the first place I believe that Doctor Gunter’s suggestion that the northern species should be known at Penaeus fluviatilis Say and the southern as P. setiferus (L.) instead of respectively P. setiferus (L.) and P. schmitti …

Specific Names Of The Atlantic American White Shrimp (Family Penaeidae), Gordon Gunter

Gulf and Caribbean Research

Penaeid shrimp are of special interest to zoologists for several reasons, one being the fact that they are unique among the decapod Crustacea in having a nauplius larval stage, which is otherwise found only in lower groups.

The shrimp catch of the south Atlantic and Gulf coasts in 1360 amounted to one-fifth of the total value of all fishery products of the United States (Power, 1961), and the shrimp fishery is the most valuable one in the country. The catch depends almost wholly upon three species, Penaeus aztecus Ives, P. duorarum Burkenroad and P. setiferus (Linnaeus) , according to current …

Food For Thought In Rabbit Poisoning, J W. Leighton

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

SINCE the introduction of the "1080" Poisoning Unit Scheme in 1955 by the Agriculture Protection Board reasonable control of rabbit numbers has been obtained.

Besides this many important side effects have resulted.

Dairy Hygiene, J F. Brennen

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

A high standard of hygiene is essential in the production of milk and milk products for human consumption.

Dairy Instructor J. F. Brennen, M.D.A., outlines some of the steps needed in order to achieve this.

Mineral Supplements, Laurence C. Snook

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

TJRODUCTIVE dairy cows have a high mineral requirement. A deficiency can cause lowered milk production and poor health may result if it is not corrected.

Water For Agriculture. 1. Water For Agricultural Purposes In Western Australia, Department Of Agriculture, Western Australia

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

THE total soluble salts content of a water is the most important characteristic in determining the suitability of Western Australian waters for stock, irrigation or general use.

Other quality characteristics are of secondary importance.

Hard Seeds In Lupins, B J. Quinlivan

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

A study of hard seeds in the W.A. blue lupin is yielding some interesting facts about this important survival mechanism of pasture plants.

The knowledge gained will be useful in future pasture plant breeding projects.

SOME interesting facts on hard seeds in lupins have come from experiments commenced several years ago.

This article outlines the reasons for the experiments and the results with lupins so far.

Subsequent articles will cover subterranean clover and techniques for softening hard seeds in both species before planting.

Getting Ready For Summer, Department Of Agriculture, Western Australia

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

THE spring period is one of completion and preparation for poultry farmers.

Investment Theory And Forest Management Planning, Barney Dowdle

Yale School of the Environment Bulletin Series

No abstract provided.

Perennial Atriplex Of Utah And The Northern Deserts, Craig A. Hanson

Theses and Dissertations

Atriplex is a genus in the Chenopodiaceae, the perennial members of which are ecologically important in western North America. Seventeen species and one subspecies of perennial Atriplex occur in Utah and the northern deserts. Three of these species and the subspecies were described by the writer in a recent publication as a result of extensive field work leading to this study. These are A. welshii, A. navajoensis, A. bonnevillensis, and A. cuneata ssp. introgressa. This study is an investigation of the systematics and phytogeography of the perennial Atriplex in Utah and the northern deserts, with emphasis on the A. gardneri …