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Wildflowers Of The Geraldton District, E M. Bennett

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

THE wildflowers of Western Australia which have aroused such interest throughout the world are found largely in the south western corner of the State.

Within this area, and indeed in the drier areas also, certain districts are richer than others.

One example of this concentration of wildflowers occurs to the north and east of Geraldton.

Lupins In Western Australia. 2. Cultivation Methods, John Sylvester Gladstones

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

While lupins are by and large plants of lighter and less fertile soils, important differences exist among them in their soil preferences.

There may also be some differences in climatic requirements. Present knowledge of these differences is summarized in the Table below.

The Long Term Effects Of Frequent Cropping, Stanley Thomas Smith

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

AGRICULTURALLY speaking, few Western Australian soils are more than 50 years old. We have the responsibility of preserving them for farming—not for one man's lifetime, but for centuries.

The aim of this article is to demonstrate that cropping and cultural practices do have some effects on the soil, and that these effects should be considered when choosing a farm rotation.

Poison Plants Of Western Australia : The Toxic Species Of The Genera Gastrolobium And Oxylobium : Berry Poison (Gastrolobium Parvifolium Benth.) Spike Poison (Gastrolobium Glaucum C.A. Gardn.) Hook-Point Poison (Gastrolobium Hamulosum Meissn.) Scale-Leaf Poison (Gastrolobium Appressum C.A. Gardn.), T E H Aplin

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

This article deals with four species which, apart from spike poison, may be distinguished by their small leaf size. Scale-leaf poison is found in the Irwin district, and the other three are present in the Avon district.

Director's Report, Lee W. Lenz

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Engineering For Higher Yields, Yoshiaki Ishizuka

Department of Agronomy and Horticulture: Faculty Publications

It was difficult for me to understand the meaning of "engineering" as used in the title of my speech. I asked Dr. Haskins who told me that the term engineering is used here because one traditional role of the engineer has been the application of scientific principles in the solution of practical problems, and that in this case we want to consider the application of biological principles in both past and future increases in crop yield. Accordingly, I intend to express my thoughts on this problem, and to ask your suggestions for obtaining higher and better yields in the future. …

Mechanisms Of Translocation Of Plant Metabolites, Orlin Biddulph

Department of Agronomy and Horticulture: Faculty Publications

The mechanism of translocation has been discussed since the latter part of the 19th Century, when DeVries, in 1885, proposed protoplasmic streaming as the mechanism. Since that time O. F. Curtis, beginning about 1920, and more recently Thaine (1961) and Canny and Phillips (1963) have become interested in this approach to the problem. In the meantime Munch, in 1930, proposed a pressure flow mechanism based on a turgor pressure gradient in the phloem between metabolite supplying and metabolite consuming areas. These two mechanisms, and others, are fully discussed in Swanson (1959), so the present paper will deal with a compilation …

A Supplement To The Floras Of Santa Catalina And San Clemente Islands, Los Angeles County, California, Robert F. Thorne

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Studies In Stylidiaceae: New Taxa, Field Observations, Evolutionary Tendencies, Sherwin Carlquist

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Fertility Build Up Under Northern Wheatbelt Pastures, M L. Poole

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

Experiments on two farmers' properties demonstrated that legume pastures increase the fertility of northern wheatbelt soils.

Crops on legume pastures had higher yields than crops on volunteer pasture.

The experiments also indicated the most productive legume species for each situation and demonstrated that nitrogen added by legumes has a residual effect in the soil.

Saltland Pastures, C V. Malcolm

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

FOLLOWING THE DEVELOPMENT of Agriculture in Western Australia considerable areas of highly productive land have become salt affected to the degree that normal crops and pastures cannot be grown.*

However, species and establishment methods are available which can bring at least some of this land back into production.

The Effects Of Some Silvicultural And Soil Treatments On Aspen (Populus Tremuloides Michx.) Reproduction In Northern Utah, Calvin O. Baker

Aspen Bibliography

No abstract provided.

The Effect Of Cattle, Sheep, And Other Factors On Aspen (Populus Tremuloides) Reproduction After Clear-Cut Logging In Southern Utah, Paul A. Lucas

Aspen Bibliography

No abstract provided.

Populus: A Bibliography Of World Literature, 1854-1963, R.E. Farmer Jr., J.S. Mcknight

Aspen Bibliography

No abstract provided.

Taxonomic And Ecological Study Of A Hillside Marsh, Coles County, Illinois, Hampton M. Parker

Masters Theses

No abstract provided.

Digitaria Adscendens And D. Sanguinalis (Gramineae) In Arkansas, Albert Robinson Jr.

Journal of the Arkansas Academy of Science

No abstract provided.

Estimating Surface Area Of Soybean Root Systems, John B. Carlson

Journal of the Minnesota Academy of Science

A procedure for estimating the total root length, root surface, and root hair surface is described for greenhouse-grown soybeans. Data are presented on the extent of the root systems of 3-week and 14-week old soybeans. The possibility of correlating data from greenhouse-grown soybeans with that of field-grown soybeans as a method to make some predictions on extent of the root systems of field-grown soybeans is suggested.

Pasture Seed Production In Western Australia, B J. Quinlivan

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

Pasture seed production in Western Australia is an industry with a somewhat turbulent past. Booms and slumps have been the rule rather than the exception.

However, during the past few years there has been some degree of "stability"—if not in price, at least in terms of total production.

How Important Are Wild Oats?, J G. Paterson

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

WILD OATS tend to grow best on heavy, fertile land. They can be a particular problem in wheat crops where soils of this type predominate.

Trials have shown that wild oat competition is more important in a high yielding wheat crop than it is in a low yielding one. The extent of this competition is described in this article.

Dormancy And Life Span Of Saffron Thistle Seeds, B J. Quinlivan, J. R. Pierce

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

RESEARCH in the Geraldton area has indicated that seeds of the saffron thistle (Carthamus lanatus) spread their germination over some seven years but most germinate in the first two years.

Factors influencing the rate of germination and the survival of seeds are the depth of burial and the presence of termites in the soil.

Poison Plants Of Western Australia : The Toxic Species Of The Genera Gastrolobium And Oxylobium : Champion Bay Poison (G. Oxylobioides Benth.), Sandplain Poison (G. Microcarpum Meissn.), Cluster Poison (G. Bennettsianum C.A. Gardn.), Hutt River Poison (G. Propinquum C.A. Gardn.), Gilbernine Poison (G. Rotundifolium Meissn.), T E H Aplin

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

THIS article deals with five species of the genus Gastrolobium. The plants look rather similar so in the past have often been confused. They occur over a considerable area of the agricultural region of Western Australia.

Poison Plants Of Western Australia : The Toxic Species Of The Genera Gastrolobium And Oxylobium : Net-Leaf Poison (O. Racemosum (Turcz.) C.A. Gardn.), Brother-Brother (O. Tetragonophyllum E. Pritzel), Rigid-Leaf Poison (O. Rigidum C.A. Gardn.), Slender Poison (O. Heterophyllum (Turcz.) Benth.), Round-Leaf Poison (G. Pycnostachyum Benth.), T E H Aplin

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

THIS article deals with five toxic species, all of which are found in the Eyre district of the South-Western region of Western Australia.

Subject Index For Physiological Aspects Of Crop Yield

Department of Agronomy and Horticulture: Faculty Publications

Subject Index
8 pages
Anatomy [to] Yield, requirement

Some Noteworthy Species Of The Arkansas Flora, Gary E. Tucker

Journal of the Arkansas Academy of Science

No abstract provided.

Survey Of The Arkansas Campanulaceae (Including The Lobeliaceae), Edwin B. Smith

Journal of the Arkansas Academy of Science

This paper is a summary of the Campanulaceae of Arkansas, based on the material on file in the University of Arkansas herbarium. A key to the species is included, followed by an alphabetical listing by genus and species of the taxa in the Campanulaceae known to occur in the state. After each taxon, the following information is included in this order: blooming period (as indicated on our material), known distribution in general terms (NW-northwest, E-east, G-general, C- central, etc.), habitat, chromosome number (as reported in Darlington & Wylie, 1955; in the Index to Plant Chromosome Numbers, Vol. I.II, and Supplement; …

Study Of The Herbaceous, Vascular Plants From Selected Sites In Faulkner County, Arkansas, Sara Mills Barnett

Journal of the Arkansas Academy of Science

No abstract provided.

More Butterfat Per Acre At Denmark Research Station, Department Of Agriculture, Western Australia

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

STOCKING rates on dairy farms are generally too low and can be substantially increased, but unfortunately there is no satisfactory measurement to indicate the potential of a particular pasture or environment.

A trial carried out on Denmark Research Station in 1966-67, to obtain information on carrying capacity of a dryland kikuyu-subterranean clover pasture.

Metabolic Sinks, Harry Beevers

Department of Agronomy and Horticulture: Faculty Publications

The continued growth of higher green plants well supplied with water and inorganic nutrients depends primarily on (i) the accomplishment of photosynthesis in the leaves and (ii) the transport of organic compounds from the leaves to heterotrophic cells which constitute metabolic sinks.

Light Interception And Radiative Exchange In Crop Stands, John Monteith

Department of Agronomy and Horticulture: Faculty Publications

Crops grow and use water because they intercept radiation from the sun, the .sky, and the atmosphere. Diurnal changes of solar radiation dictate the diurnal course of photosynthesis and transpiration, and the vertical gradient of radiant flux in a canopy is a measure of the absorption of energy by foliage at different heights. Without exaggeration, the distribution of radiation within a plant community is the most important single element of microclimate.
Early ecological studies of radiation climate were mainly descriptive and were limited in scope by rather primitive instrumentation. A new quantitative approach to the subject was initiated by Monsi …

Physiological Significance Of Internal Water Relations To Crop Yield, R. O. Slatyer

Department of Agronomy and Horticulture: Faculty Publications

The overall effects of water deficits on crop yield are known to everybody. Moderate water deficiencies can result in stunting, distorted development, and much reduced crop yields, and prolonged drought can cause complete crop failure.
Despite these visible symptoms of deficiency, a clear and unambiguous statement as to the effect of deficits on crop yield is difficult to make, for a variety of reasons. Firstly, despite the importance of the phenomenon to agriculture in most of the food producing countries of the world, relatively little attention has been devoted to its water deficits. Secondly, and in part this is a …