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Articles 13711 - 13740 of 13821
Full-Text Articles in Physical Sciences and Mathematics
Land Grading In South West Irrigation Areas, 1966-67, Department Of Agriculture, Western Australia
Land Grading In South West Irrigation Areas, 1966-67, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
Land grading in the South West Irrigation Areas with modern earth moving equipment first commenced in 1949.
The advantages of land grading are well recognised by farmers and this season grading operations were carried out on 208 farms.
The Hamel Nursery, K S. Cole
The Hamel Nursery, K S. Cole
Journal of the Department of Agriculture, Western Australia, Series 4
A LITTLE known, but highly productive use of irrigation water occurs at the Forestry Department Nursery, Hamel.
Seedlings of trees and shrubs are raised during the summer for sale the following winter.
Sales are made to the farming community and many trees are used by the Forest Department in its reafforestation programmes.
Phalaris Staggers : Prevention By Cobalt Bullets, Bryan J. Gorddard, P. P. Mann, A. J. Hadlow
Phalaris Staggers : Prevention By Cobalt Bullets, Bryan J. Gorddard, P. P. Mann, A. J. Hadlow
Journal of the Department of Agriculture, Western Australia, Series 4
FARMERS in the south west of Western Australia are familiar with the use of cobalt for the prevention of ill-thrift and deaths due to cobalt deficiency in sheep and cattle.
Less common is the use of cobalt for the prevention of chronic phalaris poisoning, known as phalaris staggers.
This condition is well known in eastern Australia, but only isolated cases have been recorded in W.A. no doubt due to the relatively small area sown to phalaris in this state.
Recommendations For The Establishment Of Harbinger Medic In The Northern Wheatbelt, R J. Parkin
Recommendations For The Establishment Of Harbinger Medic In The Northern Wheatbelt, R J. Parkin
Journal of the Department of Agriculture, Western Australia, Series 4
Harbinger is an early-maturing medic that has met with success on some soil types, especially in the northern wheatbelt.
Similar to Cyprus barrel medic but best suited to different soil types, harbinger adds to the range of pasture legumes available for sowing in under 16 in. annual rainfall areas.
The Australian Field Cricket, J A. Button
The Australian Field Cricket, J A. Button
Journal of the Department of Agriculture, Western Australia, Series 4
THE Australian field cricket, or the black field cricket as it is sometimes known, is a native of Australia and is widely distributed throughout the south western, south and south eastern sections of the continent.
Isolation Of A Toxic Substance From Centaurea Repens, Merton E. Sprengel
Isolation Of A Toxic Substance From Centaurea Repens, Merton E. Sprengel
Loma Linda University Electronic Theses, Dissertations & Projects
A poisonous steroid-type compound was isolated from Centaurea repens. After extraction with absolute ethanol, removal of the solvent, addition of 2% HCl to precipitate the pigments, and filtering, the pH was adjusted to 9 with aqueous anunonia. This solution was exhaustively extracted with chloroform, evaporated to dryness, and extracted with ethyl ether.
This fraction was chromatographed on silica-gel plates, using 10:1 1,2-dichloroethane-methanol as the developer. The band at Rf 4.2 was removed and found toxic to mice. Labored, slow, gasping respiration and frequent involuntary muscular contractions became apparent within a few minutes following the intraperitoneal injection into each animal. Death …
Summer And Autumn Rainfall In Relation To Epidemics Of Wheat Stem Rust In Western Australia, W A. Shipton
Summer And Autumn Rainfall In Relation To Epidemics Of Wheat Stem Rust In Western Australia, W A. Shipton
Journal of the Department of Agriculture, Western Australia, Series 4
High summer and autumn rainfalls, followed by rust infection of volunteer plants and favourable conditions during late winter and spring, lead to rust epidemics.
WIDESPREAD outbreaks of wheat stem rust are rare in Western Australia.
Cultivation : Does Haste Mean Waste?, H M. Fisher
Cultivation : Does Haste Mean Waste?, H M. Fisher
Journal of the Department of Agriculture, Western Australia, Series 4
Many farmers believe that increasing the speed of cultivation and seeding implements will cause deterioration of soils and reduced crop yields.
In a three-year trial on clover ley land at Wongan Hills higher cultivation speeds tended to increase rather than decrease wheat yields. There was some deterioration in the physical structure of the soil.
Irrigation In The South-West : Report On Government-Controlled Areas, 1965-66, G Gauntlett
Irrigation In The South-West : Report On Government-Controlled Areas, 1965-66, G Gauntlett
Journal of the Department of Agriculture, Western Australia, Series 4
LARGE scale irrigation in the south-western part of Western Australia is confined to the coastal plain, west of the Darling Range where the three irrigation districts of Waroona, Harvey and Collie have been established.
Leaf Scorching, Department Of Agriculture, Western Australia
Leaf Scorching, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
DURING the summer months, leaves of many plants develop browning and scorching which progresses inwards from the leaf margin or downwards from the leaf tip.
The affected parts become dry and brittle and may break away from the remaining green areas.
Diurnal Distribution Of Phytoplankton From A Single Station At The Mouth Of The James River, Harold G. Marshall
Diurnal Distribution Of Phytoplankton From A Single Station At The Mouth Of The James River, Harold G. Marshall
Biological Sciences Faculty Publications
Eight sets of water samples were taken to a depth of 36 ft. during a 24-hr. period. A homogeneity was found in the vertical distribution of the total phytoplankton in samples from 7 of the 8 hydro-casts. Skeletonema costatum and Asterionella japonica were the most numerous phytoplankters in every sample, with the majority of their counts each exceeding 500, 000 cells per liter.
1964 Drought In Connecticut, The, Byron E. Janes, Joseph J. Brumbach
1964 Drought In Connecticut, The, Byron E. Janes, Joseph J. Brumbach
Storrs Agricultural Experiment Station
No abstract provided.
Specialized Weather Information For Arkansas Agriculture, Donald A. Downey
Specialized Weather Information For Arkansas Agriculture, Donald A. Downey
Journal of the Arkansas Academy of Science
No abstract provided.
Fruit Growing In Western Australia, Western Australian Department Of Agriculture, Western Australian Tourist Development Authority
Fruit Growing In Western Australia, Western Australian Department Of Agriculture, Western Australian Tourist Development Authority
Horticulture published reports
Revised 1965.
The Mediterranean type climate of the coastal belt of the south-west of Western Australia is suitable for the commercial production of apples, pears, various stone fruits, oranges, grapes, and several other less important fruits. The warm dry summers (November-March), are too severe for the profitable production of many berry fruits and the winters too cool and wet for most tropical fruits. Figs, mulberries and olives all flourish in this climate but, for economic reasons, few are grown commercially.
A small tropical fruit industry, mainly bananas, has been established along the banks of the Gascoyne River at Carnarvon, which …
A History Of The War Service Land Settlement Scheme Western Australia, A, R. Barrett
A History Of The War Service Land Settlement Scheme Western Australia, A, R. Barrett
Farm Systems and Economics published reports
In writing a history of the Western Australian War Service Land Settlement Scheme, it is pertinent to remark that land settlement projects have ever been difficult and, in fact, to date very few have been really successful. However, there has always been the necessity to accede to the desire of returning men to go on the land, also in States such as Western Australia there was and still is the need for further land development. Therefore, when the Commonwealth Government offered to provide the funds for servicemen's rehabilitation on the land the State gladly accepted and agreed to take responsibility …
Kimberley Research Station Progress Report, 1964 : Soil Fertility And Plant Nutrition, D B. Parbery, R. Wetselaar
Kimberley Research Station Progress Report, 1964 : Soil Fertility And Plant Nutrition, D B. Parbery, R. Wetselaar
Journal of the Department of Agriculture, Western Australia, Series 4
BEFORE 1963, very little work, other than that described in Burvill's original report, had been done on the analysis of Ord soils, nor had their fertility status been clearly defined.
Contour Planting For Hillside Orchards. Part 1, N H. Shorter
Contour Planting For Hillside Orchards. Part 1, N H. Shorter
Journal of the Department of Agriculture, Western Australia, Series 4
FRUIT growers intending to plant an orchard on sloping land, would be well advised to consider the suitability of the block for planting on a contour system.
Leaf Scorch Of Apple Trees, N H. Shorter
Leaf Scorch Of Apple Trees, N H. Shorter
Journal of the Department of Agriculture, Western Australia, Series 4
BEFORE the 1964-65 fruit season, sections of a number of orchards in the Donnybrook district were converted to systems of permanent overhead sprinkler irrigation.
In several cases, however, leaf scorch occurred where these overhead sprinklers were used during the day time.
The Starling, John L. Long
The Starling, John L. Long
Journal of the Department of Agriculture, Western Australia, Series 4
Despite their pretty colour and their song, starlings cannot be considered beneficial, especially in the fruit and grain-growing areas of W.A. where they are declared vermin.
MILLIONS of starlings inhabit the settled parts of eastern and south-eastern Australia, but so far they have not reached Western Australia.
Kimberley Research Station Progress Report, 1964 : Climate, Jan Jerzy Basinski, E. A. Fitzpatrick, W. R. Stern
Kimberley Research Station Progress Report, 1964 : Climate, Jan Jerzy Basinski, E. A. Fitzpatrick, W. R. Stern
Journal of the Department of Agriculture, Western Australia, Series 4
A review of recent research in climate, soils, tropical crops and pastures, weeds, insect pests and cattle husbandry at the Kimberley Research Station.
EXTENSIVE climatic data are recorded at the Station and analysed in relation to crop performance, irrigation requirements, and farm management practices.
Puccinellia : Outstanding Saltland Grass, C V. Malcolm, S. T. Smith
Puccinellia : Outstanding Saltland Grass, C V. Malcolm, S. T. Smith
Journal of the Department of Agriculture, Western Australia, Series 4
"Puccinellia" is a tussocky perennial grass with an outstanding ability to survive salty and waterlogged conditions.
Considerable areas of saltland in Western Australia are suited to its growth.
Seed is now available commercially and in this article the conditions to which the grass is suited are described and establishment and management methods are suggested.
Seed And Pasture Rates For New Dairy Pastures, F E. Ryan
Seed And Pasture Rates For New Dairy Pastures, F E. Ryan
Journal of the Department of Agriculture, Western Australia, Series 4
THE success or failure of pasture establishment on new land often depends on the interaction of rate of seeding and rate of superphosphate application.
Every year large areas of virgin land are cleared and sown to pasture in the higher rainfall areas, and all-too often the new pasture is not as successful as it should be because too little super is applied, and, in some cases, too little seed.
Wheat Quality Surveys In Western Australia. 2. Variation Between Seasons And Localities In The Production Of High And Low Protein Wheat, J A. Parish
Journal of the Department of Agriculture, Western Australia, Series 4
Although the protein content of West Australian f.a.q. wheat averages only 9.4 per cent., often substantial amounts of comparatively high protein wheat are contained in this mixture.
However the quantity varies widely from year to year and is obtained from widely scattered areas of the wheatbelt.
Depletion Of Subsoil Moisture By Apple Trees And Other Woody Species, C. C. Wiggans
Depletion Of Subsoil Moisture By Apple Trees And Other Woody Species, C. C. Wiggans
Nebraska Agricultural Experiment Station: Historical Research Bulletins
This project began in 1934 and ended in 1955. The work of Kiesselbach, Russel and Anderson indicated that depleted subsoil moisture might be the reason for the loss of many orchards and the injurious effects noted on native woody forest species. Most of the work in apple orchards was done at the University Fruit Farm at Union, Nebraska. Samples were also secured from commercial plantings of apples and other woody species in areas ranging from Rulo, near the Kansas-Nebraska border, to Florence, just north of Omaha, to Lincoln and several points in central Nebraska.
Sulfur Fertilizers For Alfalfa Production In Nebraska, R. L. Fox, A. D. Flowerday, F. W. Hosterman, H. F. Rhoades, R. A. Olson
Sulfur Fertilizers For Alfalfa Production In Nebraska, R. L. Fox, A. D. Flowerday, F. W. Hosterman, H. F. Rhoades, R. A. Olson
Nebraska Agricultural Experiment Station: Historical Research Bulletins
In order to elaborate all aspects of the sulfur problem in alfalfa production, a series of field, greenhouse and laboratory experiments was initiated to determine: 1. The influence of sulfur fertilization on the yield of alfalfa in Nebraska. 2. The influence of sulfur fertilization on the protein, vitamin A, and sulfur contents of alfalfa. 3. The sulfur supplying capacities of various soils under field and greenhouse conditions. 4. The sulfur content of precipitation at widely scattered points in Nebraska. 5. Soil properties associated with sulfur deficiency. 6. Optimum methods for estimating the sulfur status of soils by soil testing. The …
Modern Methods Boost Apple Production In A South-West Orchard, N H. Shorter
Modern Methods Boost Apple Production In A South-West Orchard, N H. Shorter
Journal of the Department of Agriculture, Western Australia, Series 4
A WELL-KNOWN South-West apple orchard with an impressive cropping record is owned by W. F. & E. M. Dilley and Sons, of Upper Capel, near Donnybrook.
Trees in this orchard have been producing consistently heavy crops for many years and, furthermore, yields have increased steadily over a 10-year period.
Put Garden Rubbish To Work In A Compost Heap, W Dawson
Put Garden Rubbish To Work In A Compost Heap, W Dawson
Journal of the Department of Agriculture, Western Australia, Series 4
THERE'S a surprising amount of mumbo jumbo written about the simple compost heap. By the time you've waded through all the instructions, you feel as if you ought to have prerequisites of a doctorate in soil chemistry or an unbroken ancestry of at least three generations of professional English gardeners.
Dicalcium Silicate (Brown Mud) As An Agricultural Liming Material, Lyell Thompson, V. H. Ledbetter
Dicalcium Silicate (Brown Mud) As An Agricultural Liming Material, Lyell Thompson, V. H. Ledbetter
Journal of the Arkansas Academy of Science
No abstract provided.
The Development Of Irrigation In Nebraska, 1854–1910: A Descriptive Survey, Martin Evald Carlson
The Development Of Irrigation In Nebraska, 1854–1910: A Descriptive Survey, Martin Evald Carlson
Department of History: Dissertations, Theses, and Student Research
Preface (excerpted)
The primary purpose of this study is tto trace the development of irrigation in Nebraska from the organization of the state as a territory in 1854 through the rest of the nineteenth century. This period covers the first four stages through which irrigation progressed: individualistic, corporate, district, and state. A brief discussion of the North Platte Project is included, however, in order to carry the story into the fifth and final stage--the development of irrigation with Federal aid, as provided for in the Reclamation Act of 1902.
The emphasis of this work is on the irrigation movement and …
Saltland Notes : Don't Put Sheep In Yet, Department Of Agriculture, Western Australia
Saltland Notes : Don't Put Sheep In Yet, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
If you have sown bluebush or saltbush this year, keep the sheep out.