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Controlling Wind Erosion In Field Pea Stubbles, Jeff Russell

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

The area sown to field peas in Western Australia's eastern wheatbelt has increased from 4000 ha in 1985 to about 35, 000 ha in 1992.

While field peas can be grown on soil types not suited to lupins, their stubble is highly fragile and prone to wind erosion, even at low grazing pressure. This is one reason why some farmers are hesitant to grow field peas.

Haroest losses of field peas can also be high; levels of JOO to 200 kg/ha of seed on the ground are not uncommon. For this reason farmers believe the stubbles should be grazed.

Farmers …

Seasonal Relationships Between Phytoplankton Composition, Abundance, And Primary Productivity In Three Tidal Rivers Of The Lower Chesapeake Bay, Harold G. Marshall, Kneeland K. Nesius

Biological Sciences Faculty Publications

The seasonal abundance and successional patterns of phytoplankton, including autotrophic picoplankton, are compared to spring, summer, and fall primary production maxima that occurred in three tidal rivers. The tidal freshwaters were dominated by diatoms, chlorophytes, and cyanobacteria during a late spring through early fall period of maximum growth. In contrast, downstream assemblages were dominated by estuarine diatoms, dinoflagellates, and cryptomonads which developed spring pulses and a protracted summer-fall maximum. Autotrophic picoplankton produced a major summer pulse at all river stations with reduced abundance during other seasons. The mean annual productivity rates for the tidal James, Rappahannock, and York rivers were …

Ash/Lilac Borer, Jay B. Karren

All Archived Publications

No abstract provided.

What Are The Indirect Costs Of Pesticide Use?, Ted Evans

All Archived Publications

No abstract provided.

Cereal Leaf Beetle, Jay B. Karren

All Archived Publications

No abstract provided.

Assassin Bug, Alan H. Roe

All Archived Publications

No abstract provided.

The Export Carrot Industry, Angie Galati, Allan Mckay

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

Carrots are the single most important horticultural export commodity from Western Australia.

In 1991-92, over 23,000 tonnes of carrots worth more than $12 million (fob) were exported. The State now exports about 70 per cent of its carrot production to Singapore, Malaysia, Hong Kong and the Middle East (see Table 1). These exports account for more than 90 per cent of Australian carrot exports. The State's carrot exports started in the mid 1970s. In 1977-78, only 2170 tofcarrots were exported, but exports have increased steadily since then (see Figure 1).

Export Of Rockmelons From The Ord River, John Bonnardeaux

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

The Ord River Irrigation Area and Carnarvon are the main production areas for cucurbits in northern Western Australia. Cucurbits are also grown in Derby, Broome and around Lagrange, south of Broome.

The area planted to rockmelons in the Ord River Irrigation Area has increased from 20 ha in 1980 to 425 ha in 1992.

Rockmelon production, the most important horticultural industry in the Ord River Irrigation Area, is worth about $9 million. It accounts for about 25 per cent of the Ord's dry season value of production

Mango Exports From Western Australia, Peter Johnson, John Gallagher, Terry Hill

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

The Department of Agriculture has been at the forefront in developing a mango industry in Western Australia.

In Camarvon, the Department is concentrating on developing an export industry, while in the Ord River Irrigation Area trials have identified suitable domestic and export varieties for that environment.

The effect of planting density, hedging and pruning techniques on yield is being examined. Research has also started on identifying superior selections of the Kensington Pride variety, the most commercially important variety in Australia. The aim is to improve fruit quality, bearing reliability, and to extend the production season..

Meristic And Organogenetic Variation In Ruppia Occidentalis And R. Maritima, Robert B. Kaul

School of Biological Sciences: Faculty Publications

Floral meristic and organogenetic variation was sampled in Ruppia occidentalis from an alkaline lake of the Nebraska Sandhills and in Ruppia maritima var. rostrata from a saline, non-Sandhills lake nearby. The androecium is meristically stable, always having two stamens, but the gynoecium is not. Seventy-two percent of the flowers of R. maritima had four carpels and the others had three, and in 80% of inflorescences the two flowers had the same number. In about one-third of inflorescences having dissimilar carpel numbers, the four-carpellate flower was uppermost. The number of carpels in each flower of R. occidentalis ranged from four to …

Botanical Survey Of A Cypress-Tupelo Swamp, Veryl V. Board, Charlotte Allen, Andrea Reeves

Journal of the Arkansas Academy of Science

Collection of plants from a cypress-tupelo swamp located at the eastern border of Independence County was part of a long range plan to document the flora of the county. Efforts were made to determine if the study area would fit the current federal definition of wetlands which requires aperiodic or permanent inundation of the soil.

A Bright Future For Export Plums, Ric Engel, Glynn Ward

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

Western Australia's stone fruit industry is relatively small by Australian and world standards owing to its small domestic market and past uncertainties with export. However, the industry is expanding to take advantage of growing markets in south-east Asia. It has adopted new production and marketing technology and is developing new varieties to meet the demand.

The future for our export plums has never been as promising as it is today. This is linked to fruit quality because markets are fickle and highly sensitive to poor quality fruit.

The introduction of a Quality Management Program in 199~91 helped the State develop …

Development Of Redglobe Table Grapes For Export, Ian Cameron

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

Exports wereonce a major outlet for the Western Australian table grape industry.

Over the last 20 years however, exports have fallen from 500 to 00 tonnes per year, despite an increase in the area planted to table grapes and an increase on overseas demand for our produce.

By 1993 less than 3 per cent of the table grapes produced in the State were exported.

The introduction of Redglobe, a new table grape varietyy from California, is expected to increase the export of table grapes from Western Australia to 1000t by 1997, when the variety will represent 90 per cent of …

Jerramungup "Moort Type" Soils - Soil Description, Analyses And Discussion, Tim Overheu Mr

All other publications

Hard Setting Grey Clays, colloquially termed Moort Clays by the Central South Coast farmers of Western Australia, fall into the typical class of Sunday soils (i.e. too dry to sow a crop on Saturday and too wet on Monday) - acknowledgment that these soils can be difficult to manage. The local soil name derives from the dominant endemic vegetation growing on this soil (Eucalyptus platypus ssp) usually with no competing understory vegetation. Moort clays are most often found on mid to upper valley slopes and depending on parent material and pedogenesis are often alkaline (sometimes acidic), hard setting, sometimes cracking, …

North Stirling Land Conservation District - Soils Manual, Justin Hardy, Peter J. Tille

Soil conservation survey collection

The North Stirling Land Conservation District is located between Katanning and Albany on the northern edge of the Stirling Ranges in south-western Western Australia.It includes parts of the Shires of Cranbrook and Tambellup, covering approximately 100,000ha of the catchment of the North Stirling basin. The basin is a flat area formed on Eocene sediments with poorly defined drainage lines and many salt lakes. It is surrounded by low granite and sandstone hills. The climate is Mediterranean, with cool wet winters and hot dry summers. Average annual rainfall ranges from 375-500 mm per annum. There is very little surface or underground …

Production Of High-Value Wheats : One Sustainable Answer To The Cost:Price Squeeze, Wal Anderson, Alan Peggs, Doug Sawkins

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

Farmers and scientists alike over the past decade have sought to address the declining terms of farm trade (the cost.price squeeze) by increasing wheat yields in ways that will ensure both their economic and ecological survival. Nevertheless, costs have continued to increase as a proportion of the value of the product.

Many farmers have increased their wheat yields substantially and the industry as a whole is more conscious of the quality of its product.

Over the past 10 years or more there has been intense interest in, and considerable adoption of. conservation farming techniques such as minimum tillage, residue retention, …

Export Of Asparagus From The Ord River, John Bonnardeaux, Chris Robinson

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

Fresh asparagus is presently supplied to Australian markets from August to March from temperate regions. For the remainder of the year, there is no significant production of fresh spears in Australia.

Recent research in Taiwan, Zambia and Zimbabwe has indicated quality asparagus can be grown in tropical and subtropical regions. The harvest period can be manipulated by withholding irrigation water and cutting fems to make spears grow out-of-season.

A Tale Of Two Ladies : Pink Lady And Sundowner, John Cripps, Eleanor Melvin-Carter

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

It is five years since the first Western Australianbred Pink Lady and Sundowner apples were sold on the local market. In that time, these crisp, sweet flavoursome apples have become top-selling, premium fruit.

The story is no different overseas. Trial shipments to London, Taiwan and Singapore have indicated a big demand for the unique Pink Lady apple - far more than Western Australia can presently supply.

One million fruiting Pink Lady apple trees are needed to meet anticipated export sales. Today, there are only 100,000 trees in the ground, of which about half are bearing fruit.

New high quality apple …

Molecular Approaches For Control Of Tomato Bushy Stunt Virus, H. B. Scholthof, M. Borja, Thomas Jack Morris, A. O. Jackson

School of Biological Sciences: Faculty Publications

I N this overview strategies are discussed that are currently being tested in our laboratory in an effort to engineer resistance against tomato bushy stunt virus (TBSV) in plants. TBSV is chosen as a model-system since this is an economically important RNA virus that is well characterized at the molecular level and the virus has some interesting and potentially useful features that can be exploited to produce resistant plants. Moreover, we anticipate that the information derived from our studies with TBSV will be applicable in developing resistance to other plant viruses. Some approaches that we are attempting to apply to …

Southwest Research-Extension Center, Field Day 1993

Kansas Agricultural Experiment Station Research Reports

Report of agricultural research from Southwest Research-Extension Center of Kansas State University.

Important Pests Of Ornamental Aspen, Fred A. Baker, Karen Shotwell, Diane Alston, Sherman Thomson

Aspen Bibliography

No abstract provided.

Lichen Communities On White Oaks In East-Central Illinois, Michael R. Thon

Masters Theses

This study was conducted as a survey of epiphytic lichen communities occurring on white oak trees at Walnut Point State Park (Douglas Co.) and Fox Ridge State Park (Coles Co.). Using a system of cover classes to estimate lichen cover, quantitative data on the distribution and abundance of epiphytic lichens was obtained. These data were used to calculate summary statistics of each community including total cover, species richness, and Shannon diversity. A total of ten taxa representing six genera were found. The foliose lichen Physcia millegrana had the highest cover in the open canopy habitats while all other taxa had …

The Effects Of Turf Compression On Plants Growth Regulator Efficacy, William Lyle Petersen

Masters Theses

A 150kg lawn roller was used in combination with various Plant Growth Regulators (PGR) (Embark & Event, Event & Oust, Embark & Oust, Escort & Oust, Telar & Oust, Event & Balan, Oust & Balan, and Balan) to evaluate its affects on the growth rate of rough turf at the Coles County Airport. The rolled plots were evaluated for height, reduction of seedheads, phytotoxicity, and weed control. Rolling was of no significance to treated or untreated turf. PGR combinations containing Oust were significantly better at reducing turf height than combinations lacking Oust. PGR combinations lacking Oust discolored turf significantly less …

The Use Of Tissue Culture For The Improvement Of Salt Tolerance In Atriplex Spp, Danielle L. Eyre

Theses : Honours

Soil salinity is widespread throughout the world, and human activity is responsible for increases in the area of land affected by salt. Replanting saline areas using salt-tolerant, or halophytic, species is one method of reclaiming this land. This project investigated the possibility of using in vitro methods to select for increased salt tolerance in halophytic plants. By establishing clonal lines of halophytes in culture and screening those clones for cells exhibiting variation in their capacity to tolerate salt, it may be possible to regenerate plants with elevated salt tolerance. Clonal lines of six species of A triplex (saltbushes) were obtained. …

Wood Anatomy Of Amanoa (Euphorbiaceae), W. John Hayden, Mark P. Simmons, Linda J. Swanson

Biology Faculty Publications

Wood anatomy of 29 specimens of seven species of Amanoa from tropical Africa, South America, and the Caribbean is described. The wood is diffuse-porous with most vessels in short radical multiples. Vessel elements are notably long, have simple perforation plates and small, alternative intervessel pits; tyloses are present in heartwood. Libriform wood fibres bear thick walls. Axial parenchyma distribution is diffuse and diffuse-in-aggregates. Chambered crystalliferous axial parenchyma is common. Rays are heterocellular, narrow, and very tall. The species examined, all from moist lowland forests, have similar wood structure. Wood of Amanoa resembles that of other primitive Euphorbiaceae.

Breeding Systems In Spiranthes Magnicamporum Sheviak, Christopher D. Loyet

Masters Theses

A study of the ecology, breeding systems, and pollinators of Spiranthes magnicamporum Sheviak was undertaken in fall 1992. An initial survey of three glacial drift hill prairies revealed sexual activity in this species via removed pollinia. Two hill prairie populations were used for pollination study. In each population, five individuals were randomly selected and crossed using autogamic, geitonogamic, and xenogamic methods. In addition, ten individuals were fitted with pollinator-exclusion bags. After capsule formation, all plants were harvested. They were examined in the lab for general morphology, the presence or absence of embryo formation, and the prescence of sexual or asexual …

Corticolous Bryophytes Of East-Central Illinois, R. Korkut Canayakin

Masters Theses

Among the numerous factors that influence epiphytic corticolous bryophytes, inclination, "raintracks", aspect, and phorophyte seem to play important role.

In order to determine the effects of these factors, 203 forest trees located in five sites has been examined. The results were arranged in tables and charted.

Vegetation And Tree Survival In A Savanna Restoration Project, Vermilion County, Illinois, Mary Claire Hruska

Masters Theses

This study involved pre-burn and post-burn inventories of herbaceous and woody vegetation, a post-burn tree survival survey, the development and implementation of a management plan for the savanna restoration site and the development of general guidelines for savanna restoration. An herbarium collection was made, 242 species representing 64 families were found on the site.

There were several significant changes in the density and frequency of vegetation after the burn. The following herbaceous species increased significantly in frequency: Agalinis tenuifolia (Vahl.) Raf, Ambrosia artemisiifolia L., Carex spp., Cassia fasciculata Michx., Desmodium glabellum (Michx.) DC., Dichanthelium acuminatum (Sw.) Gould & Clark var. …

Southwest Research-Extension Center Field Day 1993

Kansas Agricultural Experiment Station Research Reports

Each Field Day report consists of individual research reports on topics specific to the region, including cultural methods for most of the major crops grown in Kansas, mitigating the effects of weeds, insects, and disease associated with those crops, and irrigation. Research is conducted and reports written by staff of the K-State Research and Extension Southwest Research Extension Center.