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 20 of 73 for “"intensively managed"”.
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Valuing critical zone services in intensively managed landscapes
… the goods and services from landscapes. In intensively managed landscapes (IML), the provisioning, supporting, and regulating services are altered through anthropogenic energy inputs so as to derive more agricultural productivity from these landscapes. Land use change and other alterations …
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Analysis of sediment dynamics in intensively managed landscapes
… sediment transport, and sediment yield in an intensively managed agricultural landscape. This objective was accomplished by combining of field sampling and measurements, laboratory analysis, sediment fingerprinting study, statistical analysis and modeling exploration in the Upper Sangamon …
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Nitrogen loss inhibitors in intensively managed winter wheat
Several potential pathways exist for significant nitrogen loss from nitrogen fertilizer applied to winter wheat in Virginia. A number of materials have been previously identified which inhibit steps in one or more of these loss pathways. Ammonium polyphosphate, ammonium thiosulfate, dicyandiamide, …
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Coevolutionary dynamics under anthropogenic impact in intensively managed landscapes
… the soil organic carbon (SOC) dynamics in intensively managed landscapes, which have accelerated soil erosion, through modeling and simulation of the coevolution of landscape and SOC. In the river valley study, we distinguish between floodplains and terraces--two similar geometries in …
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Dynamics of inorganic soil-nitrogen age in intensively managed landscape
Our interests in reactive nitrogen and the nitrogen cycle have shifted from increasing the efficiency of nitrogen delivery to target crop species to decreasing environmental damage caused by intensive agricultural practices. Enhancing the reactive nitrogen use to increase food production to meet …
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Modeling and measurement of tile drain controls in intensively managed landscapes
… drain on ecohydrologic and nutrient dynamics in intensively managed agricultural fields at lidar-resolution scales. Explicit coupling between subsurface and tile flow is obtained by modifications of variably saturated Richards equation to capture the impacts of tile drain on soil moisture. The …
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Modeling sediment loading and riverine water quality in intensively managed landscapes
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
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Simulation of Early Stand Development in Intensively Managed Loblolly Pine Plantations
A system of equations was developed and incorporated into the PTAEDA2 loblolly pine stand simulator to provide growth projections from time of planting. Annual height growth is predicted using a two-parameter Weibull function, where distribution parameters are estimated from equations that utilize …
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Live crown ratio model and lumber recovery for intensively managed loblolly pine
… planted pine species in the Southern US which is intensively managed as well as a major contributor to the timber industry. Various silvicultural treatments are commonly applied to pine plantations including thinning and sometimes pruning. Tree crowns contain the active photosynthesis region and …
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Optimizing soil and fertilizer nitrogen use by intensively managed soft red winter wheat
Field experiments were conducted in the Coastal Plain and Ridge and Valley regions of Virginia during the 1981-82 through 1985-86 winter wheat growing seasons. The treatments in all experiments consisted of varying amounts of N fertilizer rates applied at Zadoks' growth stages 25 (GS 25) and 30 (GS …
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Evaluation of Novel Techniques to Control Annual Grasses in Intensively Managed Turfgrass Systems
Annual grassy weeds are problematic in intensively managed turfgrass systems due to a lack of selective and affordable control options. Four projects were conducted from 2020-2023 to evaluate novel techniques for Annual bluegrass (Poa annua L.), goosegrass (Eleusine indica L. Gaertn.), and smooth …
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Dry matter estimation and potassium fertilization of intensively managed soft red winter wheat
Dry matter production must be predicted to utilize nitrogen recommendation models for winter wheat at growth stage 30. Four methods of dry matter estimation were evaluated for their ability to predict dry matter production. The pasture probe, height, and rising plate methods did not have adequate …
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Quantification and Physiology of Carbon Dynamics in Intensively Managed Loblolly Pine (Pinus taeda L.)
… an understanding of C sequestration capacity in managed forests. Objectives of the first study included (1) investigating environmental, soil C, root, and stand influences on soil CO2 efflux on the South Carolina coastal plain and (2) quantifying soil CO2 efflux over a rotation in loblolly pine …
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Spatial Activity, Growth, and Population Characteristics of Siren Intermedia in an Intensively Managed Wetland
Most aspects of the ecology of lesser sirens (Siren intermedia) are poorly known. I conducted a mark/recapture study from March 1998-May 1999 at Mingo National Wildlife Refuge (MNWR), Stoddard County, Missouri, to examine spatial activity, growth rates, and population characteristics of lesser …
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Soil quality and nitrogen cycling dynamics altered by fertility amendments in intensively managed vegetable production systems
… soil quality relative to inorganic amendments in intensively managed Midwest vegetable production systems, but could result in increased N loss from these systems when conditions are suitable for denitrification, though additional studies are needed to confirm denitrification efficiency. Nitrogen …
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Depth sequence distribution and reactivity of phosphorus in intensively managed agricultural soils in East-Central Illinois
This Thesis was approved for publication on 2019-04-08 at 15:57.
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Physical and Hydrologic Responses of an Intensively Managed Loblolly Pine Plantation to Forest Harvesting and Site Preparation
… These highly productive forests have been intensively managed as pine plantations for the past few decades. More recently, harvesting and site preparation practices have become a concern among natural resource managers because intensive forestry practices may alter soil physical properties …
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Comparative determination of tick burden and diversity in intensively managed wildlife estates under those with and without prescribed burning.
Prescribed burning in ex-situ conservancies ecosystems significantly reduces tick burden and diversity. In Zambia, the role of ticks in zoonotic disease transmission is not well described, partly, due to limited available information on tick burden and diversity in ex-situ conservancies. This study …
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A NEW SITE INDEX MODEL FOR INTENSIVELY MANAGED LOBLOLLY PINE (Pinus taeda) PLANTATIONS IN THE WEST GULF COASTAL PLAIN
… To date, there is no available SI model for intensively managed loblolly pine plantations in the Western Gulf Coastal Plain. To fill the gap, the scope of the East Texas Pine Plantation Research Project (ETPPRP) was expanded and permanent plots were established in intensively managed loblolly …
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