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 14 of 14 for “"harvest management"”.
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Fall harvest management of alfalfa
Alfalfa (Medicago sativa L.) harvest schedules are often interrupted by rainfall, unfavorable environmental conditions for growth, and unfavorable weather for hay curing. Interruptions in alfalfa harvest schedules can delay the final harvest until dates considered critical to winter survival. …
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Prickly Sida (Sida spinosa L.): Biology and In-Crop and Post-Harvest Management Programs
… for control of prickly sida present after crop harvest included diuron and linuron applied with glufosinate, paraquat, or glyphosate (75 to 85% control); diuron, atrazine, or 2,4-D ester applied with paraquat (74 to 77%); and 2,4-D ester and dicamba applied with glyphosate (75%).
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Productivity and quality of tall fescue and switchgrass under two harvest managements and different harvest intensities
… and switchgrass as influenced by different harvest managements. Switchgrass and tall fescue were studied on a fine-loamy, mixed, mesic Ultic Hapludalf of the Duffield soil series at Blacksburg, VA during 1987 and 1988. Normal harvest management included harvests taken from the first growth …
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Migratory Ecology and Movement Patterns of Mid-Continent and Eastern Sandhill Cranes
… and distribution critical for well-informed harvest management. Minnesota is one of few states containing portions of 2 different breeding populations of greater sandhill cranes (A. c. tabida)—the Mid-continent Population (MCP), which has a harvest season in northwestern Minnesota in the …
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Overstory density and its effect on oak regeneration abundance and oak understory height growth in the Missouri Ozark Highlands
… collected on three different treatment types, no harvest management, uneven-aged management, and even-aged management. The probability of obtaining regeneration that met height and abundance thresholds decreased with increasing overstory density for white oaks, red oaks, and non-oaks. A relatively …
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Population ecology of and the effects of hunting on ruffed grouse (Bonasa umbellus) in the southern and central Appalachians
… forests due to changes in land use, additive harvest mortality, low productivity and recruitment, and nutritional stress. Through the cooperative nature of the ACGRP, researchers tracked >3,000 ruffed grouse between October 1996 and September 2002 and gathered data on reproduction, …
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Grain storage facilities maintenance challenges in Zambia: a case study of the food reserve agency.
… of stored grain is wasted because of poor post-harvest management in Southern African countries such as Zambia. Among the factors responsible for losses are inadequate and ineffective grain storage facilities and poor handling practices. In Zambia, the mandate for management of sustainable …
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Assessment of perennial bioenergy buffers within a row crop production system
… crops may vary by crop types, cropping systems, management practices, and field landscapes; therefore, more field research is needed to understand the influence of these factors. The studies presented in this dissertation determined the impacts of crop management, crop type, and landscape design …
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Population ecology of wood ducks in Nevada under experimental manipulation of harvest
… and increasingly, anthropogenic effects. Management directed at specific vital rates, like per capita births or deaths, is often used as a tool to influence change in wildlife populations. I experimentally manipulated harvest regulations for wood ducks in Nevada, to study how harvest …
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Evaluating the Effectiveness of Population Reconstruction for Black Bear (Ursus americanus) and White-Tailed Deer (Odocoileus virginianus) Population Management
… a minimum population size based on age-specific harvest data (Downing 1980, Roseberry and Woolf 1991). Population reconstruction techniques share the following characteristics: 1) utilization of catch-at-age data and 2) backward addition of cohorts to estimate a minimum population size. I …
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Produtividade e disponibilidade de nutrientes influenciadas pela calagem, adubação NPK e intervalos de colheita em erva-mate
Cultura típica da América do Sul, a erva-mate (Ilex paraguariensis St. Hil.), apesar da histórica importância política, socioeconômica e cultural para a região Sul do Brasil, tecnologicamente tem apresentado pouca evolução. O extrativismo, ainda muito presente no sistema de cultivo, privilegia …
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Agronomic and qualitative aspects of organic cotton cultivation [Aspetti agronomici e qualitativi della coltivazione del cotone biologico]
Il cotone, principale fibra naturale a livello mondiale, alimenta un settore dal valore di 5,68 miliardi di USD. Tuttavia, la sua coltivazione presenta rilevanti criticità di sostenibilità, legate all’elevata domanda idrica, all’uso intensivo di input chimici e all’assenza di defoglianti organici …
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Environmental Factors and Management Practices that Influence Salmonella and Listeria Prevalence at the Sub-Field Level on an Eastern Shore of Virginia Farm
… is highly dependent on environmental factors and management practices. A study was performed to determine environmental factors (e.g., landscape features, meteorological events) and management practices (e.g., date of last irrigation, pesticide application) that may impact the prevalence of …