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Articles 8971 - 9000 of 9094
Full-Text Articles in Life Sciences
Twinning Increases Production, K P. Croker
Twinning Increases Production, K P. Croker
Journal of the Department of Agriculture, Western Australia, Series 4
Many breeders claim that twinning causes too many losses among Merino lambs and does not favour breeding for twin lamb production.
But recent experiments have proved otherwise and agricultural scientists now agree that . . .
TWINNING INCREASES PRODUCTION
THE low marking percentages regularly recorded for Merino flocks suggest that the Merino is a relatively infertile breed.
Certainly, lambing percentages are low when compared with those of most British breeds of sheep.
Ninth Random Sample Laying Test, 1965-66, Department Of Agriculture, Western Australia
Ninth Random Sample Laying Test, 1965-66, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
NINTH RANDOM SAMPLE LAYING TEST, 1965-66 POULTRY RESEARCH STATION, WEMBLEY
REARING RESULTS AT HOUSING (21 WEEKS AND 3 DAYS)
SECOND PROGRESSIVE REPORT TO 27th FEBRUARY, 1966
Review Of Silvicultural Research: White Spruce And Trembling Aspen Cover Types, Mixedwood Forest Section, Boreal Forest Region, Alberta-Saskatchewan-Manitoba, J. M. Jarvis, G. A. Steneker, R. M. Waldron, J. C. Lees
Review Of Silvicultural Research: White Spruce And Trembling Aspen Cover Types, Mixedwood Forest Section, Boreal Forest Region, Alberta-Saskatchewan-Manitoba, J. M. Jarvis, G. A. Steneker, R. M. Waldron, J. C. Lees
Aspen Bibliography
The Department of Forestry has been carrying on silvicultural research in the white spruce (Picea glauca (Moench) Voss) and trembling aspen (Populus tremuloides Michx.) cover types in the Mixedwood Forest Section of Alberta, Saskatchewan and Manitoba for about 40 years. Because of the needs of industry most of this research has been focused on spruce, and only as small portion on aspen. Much of the research is concerned with basic problems and the findings in one area may be applied directly or with minor modification throughout the entire Mixedwood Forest Section. Only a minor part of the total …
Influence Of Fire On Aspen, K. W. Horton, E. J. Hopkins
Influence Of Fire On Aspen, K. W. Horton, E. J. Hopkins
Aspen Bibliography
No abstract provided.
A New Species Of Cacicus (Aves: Icteridae) From Peru, George H. Lowery Jr., John P. O'Neill
A New Species Of Cacicus (Aves: Icteridae) From Peru, George H. Lowery Jr., John P. O'Neill
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
Two New Colubrid Snakes Of The Genus Rhadinaea From Southern Mexico, Douglas A. Rossman
Two New Colubrid Snakes Of The Genus Rhadinaea From Southern Mexico, Douglas A. Rossman
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
The Nomenclature Of The Red-Winged Blackbird (Agelaius Phoeniceus) Of South-Central Mexico, Robert W. Dickerman
The Nomenclature Of The Red-Winged Blackbird (Agelaius Phoeniceus) Of South-Central Mexico, Robert W. Dickerman
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
Two New Subspecies Of Birds From Oaxaca, Mexico, Laurence C. Binford
Two New Subspecies Of Birds From Oaxaca, Mexico, Laurence C. Binford
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
Aspen-Elk Relationships On The Northern Yellowstone Winter Range, William J. Barmore Jr.
Aspen-Elk Relationships On The Northern Yellowstone Winter Range, William J. Barmore Jr.
Aspen Bibliography
No abstract provided.
Cacodylic Acid As A Silvicide, Maurice W. Day
Cacodylic Acid As A Silvicide, Maurice W. Day
Aspen Bibliography
This report deals with the effectiveness of cacodylic acid (dimethylarsenic acid) as a silvicide for undesirable trees. Cacodylic acid has been used successfully as an herbicide for the destruction of grasses and weeds. Experimental work with this material was begun during the 1963 field season, and continued during 1964, to permit complete evaluation of the results. It appears that cacodylic acid has considerable potential as a silvicide.
How To Identify Twin-Born Lambs, G T. Halpin, P. Nelson
How To Identify Twin-Born Lambs, G T. Halpin, P. Nelson
Journal of the Department of Agriculture, Western Australia, Series 4
IN the past few years it has become widely accepted that the ability to produce twin or multiple lambs is a heritable characteristic.
This means that breeding from sheep born as twins should give more multiple births and higher lambing percentages than breeding from sheep born as single lambs.
Lot Feeding Of Beef Cattle. 4. Cattle For Feed Lots, W J O Wilkie
Lot Feeding Of Beef Cattle. 4. Cattle For Feed Lots, W J O Wilkie
Journal of the Department of Agriculture, Western Australia, Series 4
BREED, age, condition, health, temperament and sex are all important in feed lot cattle.
Eighth Random Sample Laying Test, 1964-65, Department Of Agriculture, Western Australia
Eighth Random Sample Laying Test, 1964-65, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
EIGHTH RANDOM SAMPLE LAYING TEST, 1964-65
SIXTH PROGRESSIVE REPORT TO 31st OCTOBER, 1965
Eighth Random Sample Laying Test, 1964-65 : Third Progressive Report To 2nd May, 1965, Department Of Agriculture, Western Australia
Eighth Random Sample Laying Test, 1964-65 : Third Progressive Report To 2nd May, 1965, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
EIGHTH RANDOM SAMPLE LAYING TEST, 1964-65
THIRD PROGRESSIVE REPORT TO 2nd MAY, 1965
Average age of birds 276 days or 39 weeks and 3 days.
Eighth Random Sample Laying Test, 1964-65, Department Of Agriculture, Western Australia
Eighth Random Sample Laying Test, 1964-65, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
EIGHTH RANDOM SAMPLE LAYING TEST, 1964-65
FIFTH PROGRESSIVE REPORT TO 29th AUGUST. 1965
Aspen Snag Yields Record Bitterbrush Seed Cache, Edward R. Schneegas
Aspen Snag Yields Record Bitterbrush Seed Cache, Edward R. Schneegas
Aspen Bibliography
No abstract provided.
Estimates Of Heritability Of Beef Cattle Performance Traits By Regression Of Offspring On Sire, C. J. Brown, Maximo Gacula
Estimates Of Heritability Of Beef Cattle Performance Traits By Regression Of Offspring On Sire, C. J. Brown, Maximo Gacula
Genetics Collection
Data used in this study were taken from performance test records of Hereford, Aberdeen-Angus and Shorthorn sires and their progeny that were raised and performance tested at the Arkansas Agricultural Experiment Station during the years 1951 through 1962. Heritability estimates based on regression of offspring on sire were obtained from 201 male progeny belonging to 20 sire groups. The estimates obtained were 0.19±0.19 for 120-day weight, 0.27±0.13 for initial test weight, 0.93±0.18 for test daily gain, 0.43± 0.18 for feed consumption, 0.41±0.25 for feed conversion, 0.15±0.15 for type score, 0.37± 0.14 for final test weight, and 0.79±0.18 for production index.
The Role Of Fleece Measurement In Selecting Merino Sheep, H G. Neil, R. J. Lightfoot
The Role Of Fleece Measurement In Selecting Merino Sheep, H G. Neil, R. J. Lightfoot
Journal of the Department of Agriculture, Western Australia, Series 4
MANY things determine how much wool a sheep can grow.
These include the amount and quality of pasture available or how the sheep are fed, the stocking rate, the general health and thrift of the sheep and other management considerations such as cropping and the time of lambing.
Final Report : Sixth (1962-63) Western Australian Random Sample Laying Test, R H. Morris, F. A. E. Hunt
Final Report : Sixth (1962-63) Western Australian Random Sample Laying Test, R H. Morris, F. A. E. Hunt
Journal of the Department of Agriculture, Western Australia, Series 4
FINAL REPORT SIXTH (1962-63) WESTERN AUSTRALIAN RANDOM SAMPLE LAYING TEST
Final Report to December, 1963, covering a period of 500 days (71 3/7 weeks), comprising a 150-day (21 3/7 week) rearing period and a 350-day (50-week) laying period.
The Importance Of Milk Production In Beef Cattle, W J O Wilkie
The Importance Of Milk Production In Beef Cattle, W J O Wilkie
Journal of the Department of Agriculture, Western Australia, Series 4
IN recent years there has been a great deal of comment on the need for "dairy blood" in the State's beef industry.
There seems to have been some confused thinking on this matter. There is no doubt at all that a beef dam should be able to produce enough milk to do its calf well.
But there is nothing to gain and a great deal to lose if too much emphasis is placed on milking qualities without reference to beef qualities.
Seventh Random Sample Laying Test 1963-64 : Poultry Research Station, Wembley : Third Progressive Report O 26th April, 1964, Department Of Agriculture, Western Australia
Seventh Random Sample Laying Test 1963-64 : Poultry Research Station, Wembley : Third Progressive Report O 26th April, 1964, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
SEVENTH RANDOM SAMPLE LAYING TEST, 1963-6
4 POULTRY RESEARCH STATION, WEMBLEY
THIRD PROGRESSIVE REPORT TO 26th APRIL, 1964
Average age of birds 276 days or 39 weeks and 3 days.
Seventh Random Sample Laying Test : 1963-64 : Poultry Research Station, Wembley : Fourth Progressive Report To 31st May, 1964, Department Of Agriculture, Western Australia
Seventh Random Sample Laying Test : 1963-64 : Poultry Research Station, Wembley : Fourth Progressive Report To 31st May, 1964, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
SEVENTH RANDOM SAMPLE LAYING TEST, 1963-64
POULTRY RESEARCH STATION, WEMBLEY
FOURTH PROGRESSIVE REPORT TO 31st MAY, 1964
Average age of birds 308 days or 44 weeks and 1 day.
First Three Year Average Report For The West Australian Random Sample Laying Test Covering The 4th, 5th And 6th Tests, Department Of Agriculture, Western Australia
First Three Year Average Report For The West Australian Random Sample Laying Test Covering The 4th, 5th And 6th Tests, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
FIRST THREE-YEAR-AVERAGE REPORT FOR THE WEST AUSTRALIAN RANDOM SAMPLE LAYING TEST COVERING THE 4th, 5th AND 6th TESTS
Despite every effort made to provide all entries in individual tests with a uniform environment it is still possible for a particular entry's performance not to be a true indication of its inherent ability.
Random Sample Test results should therefore be viewed on a long term, annual, consecutive basis. If the yearly results for a given hatchery are grouped together and averaged over a period of several years irregularities in performance due to factors other than genetic worth are minimised and a …
Relationships And Taxonomic Status Of The North American Natricine Snake Genera Liodytes, Regina, And Clonophis, Douglas A. Rossman
Relationships And Taxonomic Status Of The North American Natricine Snake Genera Liodytes, Regina, And Clonophis, Douglas A. Rossman
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
Notes On The Avian Genus Arremonops With Description Of A New Subspecies From Honduras, Burt L. Monroe Jr.
Notes On The Avian Genus Arremonops With Description Of A New Subspecies From Honduras, Burt L. Monroe Jr.
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
A New Race Of Centurus Aurifrons (Aves: Picidae) From British Honduras, Stephen M. Russell
A New Race Of Centurus Aurifrons (Aves: Picidae) From British Honduras, Stephen M. Russell
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
A New Carolina Wren (Aves: Troglodytidae) From Southern Mexico, George H. Lowery Jr., Delwyn G. Berrett
A New Carolina Wren (Aves: Troglodytidae) From Southern Mexico, George H. Lowery Jr., Delwyn G. Berrett
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
A Revision Of The Lampornis Viridipallens Complex (Aves: Trochilidae), Burt L. Monroe Jr.
A Revision Of The Lampornis Viridipallens Complex (Aves: Trochilidae), Burt L. Monroe Jr.
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
Three New Subspecies Of Birds From Honduras, Burt L. Monroe Jr.
Three New Subspecies Of Birds From Honduras, Burt L. Monroe Jr.
Occasional Papers of the Museum of Natural Science, Louisiana State University
No abstract provided.
The Secret Of Viral Reproduction, George W. Cochran
The Secret Of Viral Reproduction, George W. Cochran
Faculty Honor Lectures
Nucleic acid is the basis of life. There are 2 types, ribose nucleic acid (RNA) and deoxyribose nucleic acid (DNA). DNA, the material found in the chromosomes within the nuclei of the cells of most living organisms, bears the genetic code that determines all of the characteristics of a living organism. Information from the DNA of the chromosomes is carried to all parts of the cell by one type of RNA called messenger RNA. Additional specialized RNA molecules are found inside the ribosomes, tiny bodies within the protoplasm that make proteins for the cell. Still other, smaller RNA molecules, called …