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The Effects Of Herbicides On Three Soil Inhabiting Blue Green Algal Species, Lee C. Darlington

All Master's Theses

The object of this study was to examine the effects of varying concentrations of 2, 4-D, Dalapon, and Tordon on the growth of several nitrogen-fixing blue-green algal species obtained from soil samples and grown under culture conditions in the laboratory.

A Comparative Survey Of Soil Microfungi From Three Vegetation Types In Cedar Valley, Utah, Brent T. Wahlquist

Theses and Dissertations

Microfungi were isolated from soil samples by the soil plate method. Soil samples were collected at depths of 0-1", 1-4", and 4-8" both between and beneath the canopy of the dominant vegetation in stands of greasewood, sagebrush, and pinyon-juniper. Salinity, pH, and percent organic matter were measured for each soil sample. A total of 148 strains of fungi representing 141 species and 46 genera were isolated and identified from these alkaline soils, Few strains, including some Aspergilli, occurred only in the more saline greasewood soils, while many strains, including several Penicillia, occurred in both sagebrush and piny-on-juniper soils but were …

A Revision Of The Hedysarum Boreale Complex, Terry Edwin Northstrom

Theses and Dissertations

The Hedysarum boreale complex consists of all North American Members of the genus Hedysarum which possess free wing auricles, sub-equal calyx teeth, hidden leaflet veins, and wingless loment articles. One species, two subspecies, and three varieties are recognized. The traditional methods of comparative morphology are employed in delimiting species in the herbarium, but pertinent data from field work are also included. The somatic chromosome number was determined for all taxa, and was found in all cases to be 16. Distribution maps, illustrations, and graphical comparisons of taxa are included.

The Effect Of High Air Temperature And Depth Of Planting On The Emergence And Development Of Selected Grain Sorghum (Sorghum Vulgare) Cultivars, Jhander Orihuela

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The behavior of seedlings of six sorghum cultivars planted at 2.5, 5.0, 7.5, and 10.0 centimeters was studied in growth chambers at air temperatures of 28, 32, 36, and 40 centigrades (daytime).

A day length of 12 hours and a nighttime air temperature 8 centigrades lower than daytime were used throughout.

The cultivars, three hybrids and three varieties, were grown in sand culture. Field moisture capacity was maintained during the period of observation.

After 14 days of growth, data were collected on the emergence percentages, above ground growth, above ground oven dry weights, below ground growth, and below ground oven …

A Histopathological Study Of Rhizoctonia Solani Kuhn Infection Of Resistant And Susceptible Lines Of Lima Bean (Phaseolus Limensis Macf.), Chulevan Bunnag

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects of Rhizoctonia solani on the hypocotyls of resistant and susceptible lines of lima bean were studied. The fungus attacks lima bean at one or more stages during host development and causes pre-and -postemergence damping-off, root rot, and foliage blight. The isolate of the fungus used in this study was obtained from infected radishes grown in Salt Lake County, Utah.

The formation of infection cushions and modes of penetration by this fungus was no different on the resistant and susceptible lima bean hypocotyls. The infection process was studied under laboratory conditions. Differential staining showed that the fungal hyphae were …

The Alkaloids Of Delphinium Occidentale S. Wats., Lester B. Kreps

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Total and individual alkaloids were determined for duncecap larkspur from emergence through seed production. Total alkaloids were determined by a titration method. Individual alkaloids were separated by thin-layer chromatography and determinations made by cochromatography.

Total alkaloid concentration was highest during early vegetative growth then decreased steadily throughout the season. Decrease in total alkaloids was specific for a certain plant part. Total alakloids in stems and petioles declined more rapidly in the spring than did alkaloids in the apexes and leaves. Seasonal decline of total alkaloid was not noted in the crowns and roots; alkaloid concentration remained constant throughout the year …

Field Insect Pests Of Rice In East Pakistan And Their Control, Shafi Uddin Bhuiya

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

To turn barren lands into smiling fields has been one of the oldest and beautiful dreams of man. But to see the smiling fields turn into barren lands might be the most horrible dream man has ever seen. Insect pests struggling for their existence can make a smiling field a barren land.

Botanical Explorations Of The Intermountain Region, Dean W. Hatch

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

After having been studied for many years by the Intermountain Herbarium staff, the Intermountain Region is now recognized as a natural floristic unit. The floristic boundaries as determined by the Intermountain Herbarium staff are indicated on the map on page 3. This area includes all of Utah, the Red Desert of southwestern Wyoming, the Snake River plains of the Columbia Plateau Province which lie south of the high mountains in southern Idaho, the sagebrush area of southeastern Oregon, the portions of California that are included within the Great Basin, most of Nevada north of the Charleston Mountain range, and the …

Western Ironweed: Research On Anatomy, Physiology, Life History And Control, M. K. Mccarty, C. J. Scifres

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Western ironweed (Vernonia baldwini Torr.) is a member of a widespread and diverse genus. The genus is characterized by perennial herbs and shrubs. Weaver and Darland listed the increase of western ironweed, at one time sparsely distributed, as an indication of degeneration of the true prairie. They described the invasion, spread, and ultimate dominance of western ironweed in many pastures after the drought years. Weaver measured ironweed roots to a depth of 11 or 12 ft., and remarked that it was one of "the most abundant and worst weeds in native pastures derived from the true prairie." Research has …

Some Factors Affecting Germination And Seedling Growth Of Scotch Thistle, C. J. Scifres, M. K. Mccarty

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Scotch thistle (Onopordum acanthium L.) is a native of Eurasia. Scotch thistle is found in the grasslands of central Nebraska, with heaviest infestations in Gosper, Dawson, and Valley Counties and limited occurrence in 18 additional counties. The Nebraska Unicameral declared it a noxious weed in 1965. This study measures the effects of some environmental factors on scotch thistle germination and seedling growth, and clarifies some of the interactions of these with inherent characteristics of the achene. The effect of achene coat, stratification, light, temperature, growth regulators, pH, depth of planting, salinity, germination inhibitors, and moisture stress were studied.

Soil Surveys In Kentucky, Harry Hudson Bailey, Robert L. Blevins

Agronomy Notes

Soil surveys are a scientific inventory of the soil and land resources of an area. They locate the different kinds of soils and provide information as to their physical and chemical properties. The surveys also contain tables and charts showing the use of the soils for agriculture, engineering, community development, recreational areas, woodland, and wildlife.

Today there is some type of soil survey activity in every county. The University has cooperative soil survey arrangements with the USDA Soil Conservation Service and the U. S. Forest Service.

Behavior Of Pesticides In Plants, Logan A. Norris

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

A number of chemicals of diverse characteristics have arbitrarily been classed together on the basis of their use and given the descriptive name "pesticides. " An unfortunate aura of mystery has developed about these chemicals. However, there is nothing unique or mysterious about the chemicals we refer to as "pesticides." Like other chemicals, they have properties which can be accurately measured; they obey all the laws of physics, chemistry, and biology.

Development Of Vascular Connections Between Lateral Buds And Main Stem In Some Decapitated Plants, Syed Mushtaq Husain, Albert J. Linck

Journal of the Minnesota Academy of Science

After decapitation of pea plants, with resultant growth of lateral buds, the thickness of vascular tissue appeared to be correlated with the growth rate of buds. Basal lateral shoots had better developed vascular strands than buds on upper parts of the plants. IAA application retarded growth of the lateral buds and inhibited their vascular connections, but all lateral buds eventually grew in spite of the IAA application.

Chemical Firebreaks, Geoffrey A. Pearce

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

MANY public bodies are making regular use of herbicides to create firebreaks. In Western Australia more than $200,000 is being spent on chemicals each year to protect property from fire.

In many situations where the buildings and property are of great value, the cost of the chemical becomes insignificant.

Promising Results On West Kimberley Pindan Country, A L. Payne

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

IN the 22 to 28 inch rainfall belt of the West Kimberley area of Western Australia are extensive areas of what is locally known as "pindan" country.

The term "pindan" refers to a light red or yellow sandy soil type supporting scattered Eucalypts, sparse-dense wattle scrub and grasses such as curly spinifex, ribbon grass and native sorghum.

Growing And Marketing Yates For Profit, Frank Melville

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

THE YATES APPLE is a late maturing red variety which because of its good storage qualities enjoyed a prominent place on the late market for many years.

The trees grow and crop well, the only disabilities are insufficient colour under some circumstances, small size fruit and a tendency to shrivel.

All these troubles can be successfully overcome by appropriate management.

Paspalum Vaginatum : For Salty Seepages And Lawns, C V. Malcolm, I. A. F. Laing

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

PASPALUM VAGINATUM, aptly termed "sea shore paspalum" has an amazing ability to thrive in wet salty situations. It is also a good lawn grass.

Seed of the grass is not available but it may easily be established by planting pieces.

This article reviews where and how the grass may be used.

Honey Plants In Western Australia, F. G. Smith

Bulletins - 3000 - 3999

Successful honey production depends, among other things on a good knowledge of the plants which produce nectar.

Every apiarist needs to know which plants are of importance to honey-bees, where those plants occur, and when they flower. He also needs to know which plants produce nectar which will result in the production of good quality honey, and which produce unpalatable or unmarketable honey. To maintain the strength of his bee colonies he also needs to know which plants produce nutritious pollen.

The object of this bulletin is to provide the basic information on these subjects in the main beekeeping areas …

Continuous Cropping Trials, M G. Mason

Experimental Summaries - Plant Research

The aims of the trials at Binnu, Chapman, Wongan Hills, Avondale and Merredin were:

1. To determine whether the application of nitgrogen and fertilisers can maintain yields under a "continuous cropping" system
2. To compare the merits of three sources of nitrogen for this purpose.
3. To determine the maintenance dressing of superphosphate under this system and the need for supplementary fertilisers.

Trial 61A2
There have been no great problems with this trial. for a number of years the plots have required chemical spraying to control wild oats which had built up. In 1968 and 1969 some plots were soil sampled to determine …

Pasture Establishment In The Wheatbelt, M L. Poole

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

The value of legume based wheatbelt pastures is so great that considerable care is warranted during their establishment. Without such care patchy establishment or even complete failure is likely to occur.

IN THE WHEATBELT too many farmers still put less effort into their seeding of pasture species than their seeding of crops.

This may be because both compete for the farmer's time in the busy seeding period and it is the cereal crop which possesses the obvious cash value.

However, the total value of a good pasture has to be assessed over a period of several years because of its …

Pasture Improvement In South Western Australia, J W. Malcolm

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

"There is no doubt that Australia's enhanced prosperity in the last 30 years has been dependent in no small measure on the use of legume-based pastures." E. M. Hutron, June, 1968. *

THE LAST 30 years have seen an increased interest in pasture improvement which has transformed much of Western Australia. Large areas have been sown to new and improved pasture species—as a result productivity of both livestock and cereal enterprises has risen.

Wildflowers Of The Stirling Range, Alexander S. George

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

TWO hundred miles south-east of Perth, the Stirling Range rises abruptly from the surrounding plain. About forty miles long, it is a line of semi-isolated hills, rather than a continuous block.

There are many intriguing plants of diverse colour and form. Well over 400 species are known from the Range. A number of these are found no-where else, and some are restricted to one mountain.

Pastures For The Pastoral Areas, D G. Wilcox, K. Fitzgerald

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

The pastoral areas lie generally outside the zone where cultivated crops are grown.

The rainfall is erratic and the basic pastures for sheep and cattle consist of native plants.

In some favoured areas however, and in particular situations, sown pasture species are becoming increasingly important.

The Control Of Weeds In Cereals, Geoffrey A. Pearce

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

PRACTICALLY all broadleaved weeds found in cereals can now be killed with herbicides and with most, the farmer has a choice of chemicals.

Two more new products are now available and these have several advantages over other herbicides.

Chemical Ploughing, Geoffrey A. Pearce

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

PROGRESS in the field of chemical weed control has been spectacular in recent years. One field that is attracting interest is the idea of replacing cultivation with chemical sprays.

Linseed Production Survey : Esperance, 1968, R J. Guyton

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

A SURVEY conducted after the 1967 linseed season found that although most farmers understood the requirements of linseed growing there were several crop failures. These were associated with time of planting, soil type and insect control measures.

The Esperance district office of the Department of Agriculture conducted a second survey during December, 1968 and January, 1969

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.

Lupins In Western Australia. 3. Cultivation Methods Continued, John Sylvester Gladstones

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

THE characteristics of the lupin varieties grown in Western Australia were described in the first two articles of the series (Journal of Agriculture, August and September, 1969), together with recommendations for growing bitter sandplain lupins.

This article gives general recommendations for growing grain lupins, and discusses the main diseases and pests of lupins in Western Australia and their control.

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.

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. …