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- Western Australia (27)
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Articles 31 - 60 of 192
Full-Text Articles in Life Sciences
Tb176: Agrelation: A Computerized Decision-Making Tool For Coloraod Potato Beetle Population Management And Environmental Quality Concerns, Charles R. Ziegler, Francis A. Drummond, Darrell W. Donahue, Stewart N. Smith
Tb176: Agrelation: A Computerized Decision-Making Tool For Coloraod Potato Beetle Population Management And Environmental Quality Concerns, Charles R. Ziegler, Francis A. Drummond, Darrell W. Donahue, Stewart N. Smith
Technical Bulletins
Many facets of Maine potato production have been simulated with computer models and expert systems. Given the ongoing improvement of computer technology and validation of past efforts, scientists can now combine several agricultural submodels into one holistic and user-friendly computer application. This bulletin reports on the development of one such application—Agrelation—aimed at modeling a portion of Maine potato production and management.
Tb179: Oxygen Supplementation For Aquaculture Biofilters, John Riley, Daniel Hagopian
Tb179: Oxygen Supplementation For Aquaculture Biofilters, John Riley, Daniel Hagopian
Technical Bulletins
There is conflicting evidence concerning the negative effects of high concentrations of dissolved oxygen on nitrifying bacteria. This project was developed to determine what happens to an established slime layer in a fixed-film, flow-through bio-filter, exposed to oxygen supersaturation. Specific objectives were to determine qualitatively and quantitatively whether the treatment is actually beneficial after acclimation, and whether rapid fluctuations in DO are detrimental to an acclimated culture.
Tb178: Methods For Evaluating Carbon Fractions In Forest Soils: A Review, Jennifer L. Evans, Ivan J. Fernandez, Lindsey E. Rustad, Stephen A. Norton
Tb178: Methods For Evaluating Carbon Fractions In Forest Soils: A Review, Jennifer L. Evans, Ivan J. Fernandez, Lindsey E. Rustad, Stephen A. Norton
Technical Bulletins
This publication was developed as part of an effort to evaluate the existing methodologies for determining carbon fractions in soils that might be applied to the question of forest soil C sequestration. A great deal of research has been done on this topic although often focused on agronomic soils. Forest land managers will be increasingly interested in identifying methods to monitor and to evaluate the effects of forest practices on soil C reserves. As well researchers are interested in this and the logical linkages to N cycling. Ultimately practical methods that can be widely utilized will be needed; these may …
Tb177: Evaluation Of An Experimental Filter Medium For Water Re-Use Systems, John Riley, David Cole, Robert Bayer
Tb177: Evaluation Of An Experimental Filter Medium For Water Re-Use Systems, John Riley, David Cole, Robert Bayer
Technical Bulletins
This report describes the development and testing of a new material for use as a filter medium in recirculating aquaculture systems and other water quality control situations. The material consists of a combination of activated carbon and a hydrophilic urethane foam in a homogeneous matrix. Its physical properties relevant to filtration were determined. It was then tested for its ability to remove various dissolved organic compounds and inorganic nitrogenous compounds in the form of a synthetic waste-water containing ammonia and nitrite. Finally it was subjected to long-term use in the biofilter of a fish culture system. It proved to be …
Tb172: Evaluation Of Entomopathogens For Biological Control Of Insect Pests Of Lowbush (Wild) Blueberry, Francis A. Drummond, Eleanor Groden
Tb172: Evaluation Of Entomopathogens For Biological Control Of Insect Pests Of Lowbush (Wild) Blueberry, Francis A. Drummond, Eleanor Groden
Technical Bulletins
To maintain the economic viability of Maine’s blueberry farms, to offer alternative pest control strategies in light of the implementation of the Food Quality Protection Act of 1996, and to reduce the human health and environmental risks associated with pest management, these researchers have been researching biological control tactics. This technical bulletin outlines protocols and experimental design necessary for evaluation of entomopathogens targeted against the significant direct and indirect pests associated with lowbush blueberry.
Tb175: A Numerical Method And Supporting Database For Evaluation Of Maine Peatlands As Candidtate Natural Areas, Ronald B. Davis, Dennis S. Anderson
Tb175: A Numerical Method And Supporting Database For Evaluation Of Maine Peatlands As Candidtate Natural Areas, Ronald B. Davis, Dennis S. Anderson
Technical Bulletins
In Maine, non-tidal peatlands comprise the last major terrestrial ecosystem group remaining largely undisturbed by humans, and for which there still exists a full range of options for protection in near-pristine condition. To make the best choices of areas to protect, ecologically based prioritization of candidate natural areas is needed. This technical bulletin presents a quantitative method of evaluation of the natural features of peatlands—providing the fundamental tool for establishing peatland protection priorities. We apply the method to the evaluation of 76 Maine peatlands representing all the morphologic/hydrologic peatland types in the biophysical regions of the state.
Tb174: Maine Wild Blueberries Field Winnowing Systems, Darrell W. Donahue, Alfred A. Bushway, Keith E. Moore, Ben J. Lagasse
Tb174: Maine Wild Blueberries Field Winnowing Systems, Darrell W. Donahue, Alfred A. Bushway, Keith E. Moore, Ben J. Lagasse
Technical Bulletins
The objective of this study was to determine if there were differences in berry quality between the two winnowing systems currently used in the Maine wild blueberry industry. The following experiment was performed three times during the 1997 field season.
Tb170: The Flora And Plant Communities Of Maine Peatlands, Dennis S. Anderson, Ronald B. Davis
Tb170: The Flora And Plant Communities Of Maine Peatlands, Dennis S. Anderson, Ronald B. Davis
Technical Bulletins
The objectives of this study are (1) to classify and describe the plant communities of Maine peatlands, (2 ) to demonstrate the relationships between the communities, (3) to characterize the communities in terms of physical and chemical variables, (4) to show the geographic distribution of the communities, (5) to investigate the relationships between plant communities and peatland geomorphic/hydrologic types, (6) to report the areal cover of vegetation cover-types (aggregated communities ) for individual peatlands, and (7) to document the flora of Maine's peatlands, including vascular plants, bryophytes, and lichens.
An Inventory And Condition Survey Of The Sandstone-Yalgoo-Paynes Find Area, Western Australia, A L. Payne, A M E Van Vreeswyk, K A. Leighton, H J. Pringle, P Hennig
An Inventory And Condition Survey Of The Sandstone-Yalgoo-Paynes Find Area, Western Australia, A L. Payne, A M E Van Vreeswyk, K A. Leighton, H J. Pringle, P Hennig
Technical Bulletins
The inventory and condition survey of the Sandstone-Yalgoo-Paynes Find area, undertaken by the Department of Agriculture and Food, Western Australia (DAFWA) between 1992 and 1993, describes and maps the natural resources of the region’s pastoral leasehold land. This survey report provides a baseline record of the existence and condition of the area’s natural resources, to assist with the planning and implementation of land management practices. The report identified and described the condition of soils, landforms, vegetation, habitat, ecosystems, and declared plants and animals. It also assessed the impact of pastoralism and made land management recommendations. The area surveyed covers about …
Tb167: Management And Winter Hardiness Of Hairy Vetch In Maine, Jean-Luc Jannink, Laura C. Merrick, Matt Liebman, Elizabeth A. Dyck
Tb167: Management And Winter Hardiness Of Hairy Vetch In Maine, Jean-Luc Jannink, Laura C. Merrick, Matt Liebman, Elizabeth A. Dyck
Technical Bulletins
The research presented here describes a set of three different experiments that sought to establish appropriate management practices for hairy vetch in Maine, and to determine whether variability for winter hardiness exists among germplasm available commercially or from gene banks. Specific objectives of the first experiment were to evaluate effects of planting date and companion crop on crop and weed dry weight and total above-ground N content, at two sites differing in drainage. In a second experiment, the winter hardiness of hairy vetch from six commercial sources and the effect of a rye companion crop on hardiness were evaluated. In …
Tb163: Insect Predation Of Seeds And Plant Population Dynamics, Jianxin Zhang, Francis A. Drummond, Matt Liebman, Alden Hartke
Tb163: Insect Predation Of Seeds And Plant Population Dynamics, Jianxin Zhang, Francis A. Drummond, Matt Liebman, Alden Hartke
Technical Bulletins
This review provides a framework for understanding the mechanisms of insect seed predation, the diversity of insects that prey on seeds, and the ecological and evolutionary consequences of insect seed predation. Insect seed predation can play significant roles in reducing plant population growth, modifying intraspecific and interspecific competition, shifting spatial and temporal distribution, affecting species evolution, and plant community structure, both in natural and agricultural ecosystems.
Analysis Of Western Australian Wool Quality On A Shire Basis, John Stanton A/Prof, Lindy Coss
Analysis Of Western Australian Wool Quality On A Shire Basis, John Stanton A/Prof, Lindy Coss
Technical Bulletins
No abstract provided.
Tb162: Red Maple And White Pine Litter Quality: Initial Changes With Decomposition, Mairin T. Delaney, Ivan J. Fernandez, Jeffrey A. Simmons, Russel D. Briggs
Tb162: Red Maple And White Pine Litter Quality: Initial Changes With Decomposition, Mairin T. Delaney, Ivan J. Fernandez, Jeffrey A. Simmons, Russel D. Briggs
Technical Bulletins
The specific objectives of this study were (a) to define the organic and inorganic composition of foliar litter from red maple (Acer rubrum L.) and white pine (Pinus strobus L.), and (b) to determine the shifts in the organic and inorganic composition of these two litter types during the initial stages of decomposition. These two species were chosen because of their prominence in the northeastern U.S. and the contrast they afforded in litter quality characteristics which have a strong influence on litter decomposition.
Tb160: The Horse Flies And Deer Flies Of Maine (Diptera, Tabanidae), L. L. Pechuman, Richard Dearborn
Tb160: The Horse Flies And Deer Flies Of Maine (Diptera, Tabanidae), L. L. Pechuman, Richard Dearborn
Technical Bulletins
The distribution of Maine Tabanidae is of special interest because of the number of species with more southern ranges which reach their northeastern limit in Maine. A few northern species reach their southern limit in the state. This paper includes all of the species known or likely to be found in Maine with specific localities by county for the more unusual species and for species not found throughout the state.
Processing Results Of Western Australian Wool, John Stanton A/Prof, Lindy Coss, Peter Metcalf
Processing Results Of Western Australian Wool, John Stanton A/Prof, Lindy Coss, Peter Metcalf
Technical Bulletins
Despite a perception by some that Western Australian wool "processes poorly", this study found that consignments processed : 1) into long tops suited for worsted weaving 2) into longer than predicted tops 3) with the same consistency as other Australian consignments.
Tb159: Drought And Cold Stress-Induced Morphometric Changes In Tree Rings Of Red Spruce, Richard Jagels, James Hornbeck, Susan Marden
Tb159: Drought And Cold Stress-Induced Morphometric Changes In Tree Rings Of Red Spruce, Richard Jagels, James Hornbeck, Susan Marden
Technical Bulletins
Morphometric analysis of individual, key growth rings might provide a way of establishing “fingerprints” or unique patterns for growth rings produced following different natural or anthropogenic stresses.
Tb158: Milk Processing And Distribution Costs: Maine 1993, Stephan C. Howick, George K. Criner, Stephen L. Jacobs
Tb158: Milk Processing And Distribution Costs: Maine 1993, Stephan C. Howick, George K. Criner, Stephen L. Jacobs
Technical Bulletins
The objective of this study is to provide an updated estimate of the theoretically lowest achievable costs of processing and distributing milk in Maine. Costs are estimated for a state-of-the-art processing plant assumed to be located in the Portland, Maine, area. The plant produces and distributes a full line of products, including white milk, chocolate milk, and orange juice, and distributes additional products such as cheeses and yogurts.
Tb157: Capture, Care, And Handling Of Fishers (Martes Pennanti), Herbert C. Frost, William B. Krohn
Tb157: Capture, Care, And Handling Of Fishers (Martes Pennanti), Herbert C. Frost, William B. Krohn
Technical Bulletins
These authors brought fishers into captivity to assess the reproductive cycles of both sexes and to monitor females with known reproductive histories. In addition, kits born in captivity were raised to sexual maturity to monitor growth and development. Here they report on the rates at which fishers were caught, the care and maintenance of fishers while in captivity, and the handling procedures used with 44 fishers taken from the wild and 38 fishers conceived in the wild and born in captivity, during the period from 1990 to 1993.
Tb156: Woody Landscape Plant Cold-Hardiness Ratings, Paul E. Cappiello, Lyle E. Littlefield
Tb156: Woody Landscape Plant Cold-Hardiness Ratings, Paul E. Cappiello, Lyle E. Littlefield
Technical Bulletins
The Lyle E. Littlefield Ornamentals Trial Garden has served as an excellent choice for testing winter survival of landscape plants. It is located on approximately 5 hectares of land comprising the highest elevation and windiest site on Marsh Island. The site is in USDA hardiness zone 4a. The soil is highly variable, ranging from a fine sandy loam to marine clay, with many stones throughout. In general, most plants are cultivated in beds mulched with mixed soft wood bark from a local mill. Plants receive supplemental irrigation during the first two seasons after planting, and thereafter irrigation is supplied only …
Tb152: The Effect Of Juvenile Wood On The Properties Of Aspen Flakeboard, Kenneth D. Roos, James E. Shottafer, Robert K. Shepard
Tb152: The Effect Of Juvenile Wood On The Properties Of Aspen Flakeboard, Kenneth D. Roos, James E. Shottafer, Robert K. Shepard
Technical Bulletins
While the effects of juvenile wood tissue on solid wood products and paper have been known for some time, little information is available regarding its influence on structural flakeboard. Juvenile and mature wood tissue were identified b y their physical and mechanical properties in quaking aspen (Populus tremuloides Michx.). Sections of juvenile and mature wood were separated from 1-foot bolts of aspen. These sections were used to prepare three distinct types of structural flakeboard : juvenile wood-based, mature wood-based, and one formed from an equal mixture of the two. The panels were tested for selected mechanical and physical properties. The …
An Inventory And Condition Survey Of Rangelands In The North-Eastern Goldfields, Western Australia, H J. Pringle, S A. Gilligan, A M E Van Vreeswyk
An Inventory And Condition Survey Of Rangelands In The North-Eastern Goldfields, Western Australia, H J. Pringle, S A. Gilligan, A M E Van Vreeswyk
Technical Bulletins
The inventory and condition survey of the north-eastern Goldfields, undertaken by the Department of Agriculture and Food, Western Australia (DAFWA) between 1988 and 1990, describes and maps the natural resources of the region’s pastoral leasehold land. This survey report provides a baseline record of the existence and condition of the natural area’s resources, to assist with the planning and implementation of land management practices. The report identified and described the condition of soils, landforms, vegetation, habitat, ecosystems, and declared plants and animals. It also assessed the impact of pastoralism and made land management recommendations. The area surveyed covers about 100 …
An Inventory And Condition Survey Of The Murchison River Catchment, Western Australia, Peter James Curry, A L. Payne, K A. Leighton, P Hennig, D A. Blood
An Inventory And Condition Survey Of The Murchison River Catchment, Western Australia, Peter James Curry, A L. Payne, K A. Leighton, P Hennig, D A. Blood
Technical Bulletins
The inventory and condition survey of the Murchison River catchment and surrounds, undertaken by the Department of Agriculture between 1985 and 1988, describes and maps the natural resources of the region’s pastoral leasehold land. This survey report provides a baseline record of the existence and condition of the natural area’s resources, to assist with the planning and implementation of land management practices. The report identified and described the condition of soils, landforms, vegetation, habitat, ecosystems, and declared plants and animals. It also assessed the impact of pastoralism and made land management recommendations. The area surveyed by field work during 1985-88 …
Analysis Of Black Point In Wheat, J M. Wilson
Analysis Of Black Point In Wheat, J M. Wilson
Technical Bulletins
Fungal staining (black point) of wheat can reduce the quality of grain. The most serious problem is a discolouration of products. Discolouration is a consequence of infection by microorganisms. The most likely cause in Western Australia is a species of the common fungus Alternaria. Infection and discolouration occur between flowering and grain maturity, and the optimum environmental conditions are probably consecutive days of high relative humidity together with warm temperatures.
Tb153: A Long-Term Study Of An Oak Pine Forest Ecosystem: Techniques Manual For The Holt Research Forest, Jack W. Witham, Elizabeth H. Moore, Malcolm L. Hunter Jr., Alan J. Kimball
Tb153: A Long-Term Study Of An Oak Pine Forest Ecosystem: Techniques Manual For The Holt Research Forest, Jack W. Witham, Elizabeth H. Moore, Malcolm L. Hunter Jr., Alan J. Kimball
Technical Bulletins
The manual is a compilation of the study techniques used for the long-term forest ecosystem research project at the Holt Research Forest in Arrowsic, Maine, plus brief evaluations of each method's advantages and drawbacks. It is based on 12 years of work by a team of three university professors, an associate scientist who has lived on the forest since 1983, a research assistant, several graduate students, and numerous undergraduate field assistants. We hope this manual will be useful to other researchers planning, or already involved in, other forest ecosystem studies.
Tb151: The Balsam Gall Midge--An Economic Pest Of Balsam Fir Christmas Trees, E. A. Osgood, R. L. Bradbury, F. A. Drummond
Tb151: The Balsam Gall Midge--An Economic Pest Of Balsam Fir Christmas Trees, E. A. Osgood, R. L. Bradbury, F. A. Drummond
Technical Bulletins
This technical bulletin summarizes all previous published research on the balsam gall midge. Also included are new data on the effect of late bud burst on midge oviposition and the degree of population regulation of the gallmaker by its inquiline.
Tb149: Wood Property-Age Relationships Of Natural And Plantation-Grown Red Pine, Robert K. Shepard, James E. Shottafer
Tb149: Wood Property-Age Relationships Of Natural And Plantation-Grown Red Pine, Robert K. Shepard, James E. Shottafer
Technical Bulletins
This study examined changes in specific gravity, modulus of rupture, and modulus of elasticity with age for a natural stand and two plantations. It also examined differences in wood properties between the three stands and the effects of important variables on, and their interactions with, wood properties. Wood property data were obtained from microbending specimens selected at breast height from five trees in each stand.
Tb141: Nitrogen Fertilization Effects On Growth And Value Of Eastern White Pine Sawlog Stands On Till And Outwash Soils, Robert K. Shepard, Gregory A. Reams
Tb141: Nitrogen Fertilization Effects On Growth And Value Of Eastern White Pine Sawlog Stands On Till And Outwash Soils, Robert K. Shepard, Gregory A. Reams
Technical Bulletins
Diameter growth response functions were developed using data collected from nitrogen fertilization study plots in eastern white pine stands on till and outwash soils. These functions were combined with height measurements and used to evaluate stand volume and value growth. White pine diameter growth functions were developed for application rates of 0, 50, 100, and 200 lb of nitrogen/ac, but only those for the 0 and 100 lb/ac treatments were compared because it was evident that the 100 lb/ac treatment would provide a larger financial return than either 50 or 200 lb/ac. The mean increase in sawtimber volume due to …
Growth And Wool Production Of Merino Wethers After Treatment With Testosterone, M A. Johns, A Meldrum, J F. Wallace, K P. Croker, F E. Watson
Growth And Wool Production Of Merino Wethers After Treatment With Testosterone, M A. Johns, A Meldrum, J F. Wallace, K P. Croker, F E. Watson
Technical Bulletins
The results were variable with there being no response to the testosterone treatment of the weaners in year 2 which were weaned onto dry feed. In the other two years, the weaners grazed at the lower stocking rates were heavier and there appeared to be a general increase in the weight of those injected with testosterone. However, the level of response was not consistent and in year 3 there was no response while the sheep grazed green feed for four months or so following weaning.
Tb148: Alternative Forage Plants For Native (Wild) Bees Associated With Lowbush Blueberry, Vaccinium Spp., In Maine, C. S. Stubbs, H. A. Jacobson, E. A. Osgood, F. A. Drummond
Tb148: Alternative Forage Plants For Native (Wild) Bees Associated With Lowbush Blueberry, Vaccinium Spp., In Maine, C. S. Stubbs, H. A. Jacobson, E. A. Osgood, F. A. Drummond
Technical Bulletins
To determine potentially suitable alternative food sources for important native bee pollinators of blueberry, the primary objectives of the present research were (1) to compile the published North American nectar, pollen, and flower records; (2) to analyze the pollen loads of native bees associated with Vaccinium spp. in Maine; and (3) to survey distribution and abundance patterns of native bee populations in Maine blueberry fields.
Tb147: Simulating The Development Of Mexican Bean Beetle Immature Stages, Epilachna Varivestis Mulsant (Coleoptera: Coccinellidae), On Dry Beans, Yuqing Fan, Francis A. Drummond, Eleanor Groden
Tb147: Simulating The Development Of Mexican Bean Beetle Immature Stages, Epilachna Varivestis Mulsant (Coleoptera: Coccinellidae), On Dry Beans, Yuqing Fan, Francis A. Drummond, Eleanor Groden
Technical Bulletins
A computer model was developed to simulate and predict the phenology of Mexican bean beetle (MBB), Epilachna varivestis Mulsant, populations on dry beans, Phaseolus vulgaris. Time-varying distributed developmental rates of the egg, four larval instars, and pupal stages were simulated with degree day models, based on a standardized cumulative probability distribution function from a range of constant temperature experiments. Predictions from the simulation model provided a good fit to the observed constant temperature data and field experiments. Using temperature data in the form of daily maximums and minimums, the model can be used to predict the occurrence of immature MBB …