Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"winterkill"”.
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Managing Stress Tolerance on Warm-Season Putting Greens in the Transition Zone
… Unfortunately, golf courses can still experience winterkill underneath protective covers. Two field trials were conducted with a goal of improving upon management strategies to improve the performance and survival of golf course putting greens under stress. Both trials were conducted on sand-based …
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MEASURING AND MODELLING COVER CROP GROWTH AND AGRONOMIC EFFECTS
… this termination method is frequently called ‘winterkill’. Black oat (Avena strigosa Schreb.) and white mustard (Sinapis alba L.) are two of the most interesting and widespread frost-sensitive cover crops due to their adaptability to various environmental conditions and cropping systems. Even …
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The Effect of Grass Carp Introduction on Aquatic Vegetation and Existing Fish Populations in Two Small Prairie Lakes
… in Prior Lake was greatly reduced due to a winterkill which occurred in the late winter of 1986. Bluegill and largemouth bass (Micropterus salmoides) were the most abundant fish species found in Prior Lake in 1987. Bluegill appeared to be overpopulated as their PSD value was 1; a high Wr of …
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Evaluation of a Power Plant Reservoir as a Fingerling Walleye Rearing Facility
… (129 fish) in 1987. Harvest was low because winterkill did not eliminate fish predators from the evaporation pond. Harvested fingerlings averaged 133.0 mm± 4.4 mm (SE) and 122.7 mm± 2.9 mm in total length in September, 1986 and 1987, respectively. Growth was reduced by a late-summer decline …
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Winter Limnological Conditions in a PRAIRIE Pothole and the Application of Molecular Oxygen
… was evaluated as a practical method to prevent winterkill. Ice and snow conditions after 20 December, 1977 allowed little light penetration, and phytoplankton numbers (6174/ml to 1668/ml) and chlorophyll concentration (46.6 mg/L to 14.1 mg/L) decreased throughout the winter. Aquatic bacteria and …
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Evaluation of Fish Stocking in Southeastern South Dakota Ponds
… the fishes stocked. Pond dryness and/or winterkill attributed to the failure of 121 (65%) of the ponds. A subsequent field survey of 30 ponds identified fish populations of recreational value. Attempts were made to identify important pond parameters that contributed to successful fish …
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Control of Common Carp in the Heron Lake Watershed, Minnesota
… shallow (maximum depth 1. 5 m), turbid lakes. Winterkill conditions killed four of six radiotagged common carp the first year, but all survived the second year. Fish in North Heron Lake overwintered in the center 160 hectares, and fish in South Heron Lake overwintered in the northernmost …
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Heterosis between semidormant and nondormant derived alfalfa germplasm
… the upper Midwestern United States due to severe winterkill. Three cycles of recurrent selection were conducted in four nondormant cultivars and winter hardiness was substantially improved in all four. The objective of this study was to test the hypothesis that the nondormant derived alfalfa …
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Optimizing Bermudagrass Management Strategies Using Aerial Imagery and Wireless Capacitive Soil Sensors
… making related to irrigation practices and winterkill stress mitigation. The first study assessed the impact of morning leaf wetness from dew and subsequent removal on remotely sensed visible imagery for creeping bentgrass and HBG. The data suggests that leaf wetness minimally influences …
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Food web regulation under different forcing regimes in shallow lakes
… macrophytes, respectively. Before the partial winterkill of fish Schulzensee allowed for a higher proportion of piscivorous fish than Gollinsee. However, the partial winterkill of fish aligned both communities as piscivorous fish are more sensitive to low oxygen concentrations. Young of the …
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Influence of Resource Pulses Following Stochastic Disturbances on Aquatic Food Webs
… carrion biomass and nutrients released following winterkill and their resulting effects on nutrient availability and primary and secondary productivity; 2) to evaluate how ecosystem effects resulting from resource pulses following stochastic disturbances compare to continuous subsidies supplied by …
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Exploiting the Productivity of C4 Photosynthesis in Cool Temperate Climates: Mechanisms and Thresholds of Cold Tolerance in Miscanthus, Saccharum, and Spartina pectinata
… of subzero temperatures with reports of winterkill in some cold climates. Spartina pectinata is a C4 perennial grass native to North America with a distribution up to 61°N latitude. The purpose of this thesis is to compare cold tolerance thresholds across these C4 perennial grasses and …
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Evaluation of Largemouth Bass and Bluegill Stocking Strategies in South Dakota Ponds
… of study ponds experienced at least partial winterkill during the study. First-year largemouth bass growth averaged 165 mm in the high-density split, 183 mm in the low-density split, and 176 mm in the simultaneous-stocking treatments. Growth of largemouth bass in the second year was 283 and …
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Using cover crops to alleviate compaction in organic grain farms
… crop density was determined every fall prior to winterkill and spring before termination by tillage. Weed density, along with their biomass and species identification were collected prior to cash crop planting and during the growing season, while cash crop yields were determined every fall. Soil …
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Yellow Perch Production in Semi-Permanent Wetlands in Eastern South Dakota and Evaluation of a New Chemical Marking Tool for Juvenile Yellow Perch
… fluctuate due to inconsistent recruitment and/or winterkill. Therefore, South Dakota Department of Game, Fish and Parks (SDGFP) uses semi-permanent wetlands as yellow perch rearing ponds to support maintenance or supplemental stocking efforts. Age-0 yellow perch harvest in these rearing ponds is …
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Advanced Largemouth Bass Production and Stock Contribution to Small South Dakota Impoundment Fisheries
… body or to reestablish a population following a winterkill, summer‐kill, or drought. Maintenance stocking and supplemental stocking are often less successful than introductory stockings. The primary focus of this study was supplemental and maintenance stocking of largemouth bass. Age‐0 largemouth …
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Impact of Management Practices on Cold Tolerance of Ultradwarf Bermudagrass Putting Greens
Low temperature injury is among the greatest challenges facing golf courses with ultradwarf bermudagrass (UDB) (Cynodon dactylon (L.) Pers. x C. transvaalensis Burtt-Davy) putting greens in Virginia. This research focused on the impact of turf covers, fungicide programming, core aeration, and …