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Articles 9181 - 9210 of 9279

Full-Text Articles in Earth Sciences

Salty Seepages Can Be Productive, C V. Malcolm Jan 1961

Salty Seepages Can Be Productive, C V. Malcolm

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

MUCH has been said and written concerning the use of Paspalum vaginatum for growing on seepage areas, but the general production to be expected from seepage areas has not received much attention.

The fact is that properly handled, seepage areas can be quite productive, and can be valuable for summer grazing.


Manage Your Rainfall For Maximum Production, J E. Watson Jan 1961

Manage Your Rainfall For Maximum Production, J E. Watson

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

TTOW much would an extra inch of rainfall be worth to you? Much sloping land loses this much and more by run-off every year.

The soil is the main asset of your farm, but your profits depend on how you manage the rain which falls on it.


Special Report (1960), Walter A. Lawrance Nov 1960

Special Report (1960), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Odor Report (1960), Walter A. Lawrance Nov 1960

Odor Report (1960), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Addition Of Sodium Nitrate (1960), Walter A. Lawrance Nov 1960

Addition Of Sodium Nitrate (1960), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Analytical Data (1960), Walter A. Lawrance Nov 1960

Analytical Data (1960), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Press Report (1960), Walter A. Lawrance Nov 1960

Press Report (1960), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Reclaiming Salt Land With Bluebush, Stanley Thomas Smith Jan 1960

Reclaiming Salt Land With Bluebush, Stanley Thomas Smith

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

IN Western Australia there are approximately a million acres of salt land, some of which is a serious economic problem to individual farmers, unfortunate enough to have the major portion of their properties affected by salt encroachment.


Soil Conservation In The Kimberley Area Of Western Australia, K Fitzgerald Jan 1960

Soil Conservation In The Kimberley Area Of Western Australia, K Fitzgerald

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

OFFICERS of the Soil Conservation Branch of the West Australian Department of Agriculture, have not been engaged in soil conservation work in the Kimberleys prior to this year, not because a serious erosion problem did not exist, but rather because with limited trained staff available they were too fully occupied elsewhere.

The recent arrival of a senior Soil Conservation Officer in the area to assist and plan an approach to the problem of soil erosion in the Ord River catchment area is therefore very welcome.


Comprehensive Survey Of Sedimentation In Lake Mead, 1948-49, W. O. Smith, C. P. Vetter, G. B. Cummings, U.S. Bureau Of Reclamation Jan 1960

Comprehensive Survey Of Sedimentation In Lake Mead, 1948-49, W. O. Smith, C. P. Vetter, G. B. Cummings, U.S. Bureau Of Reclamation

Publications (WR)

Reservoirs are becoming an increasingly prominent feature of the American landscape. Built for flood mitigation and to change a fluctuating river into a dependable source of water for irrigation, power, and other purposes, they are predestined, like natural lakes, to be destroyed sometime following their creation. Sedimentation sooner or later robs most lakes and reservoirs of their capacity to store water. The significance of sedimentation in the life of Lake Mead, the largest artificial reservoir in the world, was realized when the plan for the reservoir was conceived, and an aerial survey of the floor was made in 1935 before …


Irrigation In Western Australia : Report On Government-Controlled Areas : 1958-59, H K. Gibsone Jan 1960

Irrigation In Western Australia : Report On Government-Controlled Areas : 1958-59, H K. Gibsone

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

IRRIGATION in the south-western portion of Western Australia is mainly confined to the coastal plain west of the Darling Range where the three main irrigation districts of Harvey, Collie and Waroona have been established by the State Government.

The Government-controlled irrigation areas extend southward from Waroona (70 miles from Perth) to Dardanup (120 miles from Perth) and have an average width of about five miles.


Addition Of Sodium Nitrate (1959), Walter A. Lawrance Nov 1959

Addition Of Sodium Nitrate (1959), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Press Report (1959), Walter A. Lawrance Nov 1959

Press Report (1959), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Odor Report (1959), Walter A. Lawrance Nov 1959

Odor Report (1959), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Analytical Data (1959), Walter A. Lawrance Nov 1959

Analytical Data (1959), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Opposed Discs For Furrowing In Pastoral Areas, W. M. Nunn Oct 1959

Opposed Discs For Furrowing In Pastoral Areas, W. M. Nunn

Journal of the Department of Agriculture, Western Australia, Series 3

THROUGHOUT our pastoral regions in all land divisions from Murchison to Kimberley, there are extensive areas of bare country which must be broken in some way to enable water penetration and to provide a place for seed to lodge before regeneration of pasture species can be expected. Earlier articles in this Journal have explained the occurrence of these bare areas, and described methods of furrowing. Checkerboard designs have been successful on perfectly level locations but contouring becomes essential where there is a slope of any dimension.


Press Reports (1958), Walter A. Lawrance Nov 1958

Press Reports (1958), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Addition Of Sodium Nitrate (1958), Walter A. Lawrance Nov 1958

Addition Of Sodium Nitrate (1958), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Analytical Data (1958), Walter A. Lawrance Nov 1958

Analytical Data (1958), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Odor Reports (1958), Walter A. Lawrance Nov 1958

Odor Reports (1958), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Tyrosine Lignin (1957), Walter A. Lawrance Nov 1957

Tyrosine Lignin (1957), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Addition Of Sodium Nitrate (1957), Walter A. Lawrance Nov 1957

Addition Of Sodium Nitrate (1957), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Odor Report (1957), Walter A. Lawrance Nov 1957

Odor Report (1957), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Analytical Data (1957), Walter A. Lawrance Nov 1957

Analytical Data (1957), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Press Reports (1957), Walter A. Lawrance Nov 1957

Press Reports (1957), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Benthal Report (1957), Walter A. Lawrance Nov 1957

Benthal Report (1957), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Industrial Wastes: Bio-Assays For Control Of Industrial Effluents, Croswell Henderson, Clarence M. Tarzwell Sep 1957

Industrial Wastes: Bio-Assays For Control Of Industrial Effluents, Croswell Henderson, Clarence M. Tarzwell

United States Environmental Protection Agency: Publications

Waste effluents from many industries are toxic to fish and other aquatic life. The control or treatment of these wastes for safe release into receiving waters presents a problem of consider able magnitude.

Much effort has been expended by some industries to solve this problem, primarily through chemical analysis for possible toxic components and then generally by a search of the literature to find out how toxic a particular component may be. Unfortunately, this approach has not been successful, nor can it be expected to be productive of satisfactory answers.


Liming Of Bay 16 (1956), Walter A. Lawrance Oct 1956

Liming Of Bay 16 (1956), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Addition Of Sodium Nitrate (1956), Walter A. Lawrance Oct 1956

Addition Of Sodium Nitrate (1956), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.


Analytical Data (1956), Walter A. Lawrance Oct 1956

Analytical Data (1956), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.