total dust, respirable dust, and microflora toxin concentrations in colorado corn storage aid in the process of characterizing corn dust exposures on farms and in elevators in northeastern colorado, several parameters were examined. total dust and respirable dust samples were collected and evaluated. potentially dangerous dust components evaluated were respirable silica, endotoxin, and mycotoxin levels. many of the total dust samples (58%) would have exceeded 8-hour time-weighted average (twa) had sampling been conducted for 8 hours; on farms the operation takes between two and fo ...200212049430
insect pest densities across site-specific management zones of irrigated corn in northeastern colorado.the ability to manage insect pests in a site-specific manner is hindered by the costs and time required to describe pest densities and distributions. the purpose of this study was to determine whether insect pest distributions are related to site-specific management zones (ssmzs). site-specific management zones, as described in this study, delineate fields into three zones of similar yield potential: high, medium, and low productivity. if insect densities vary across ssmzs, it is possible that m ...200717598539
spatial variability of atrazine and metolachlor dissipation on dryland no-tillage crop fields in area of interest in precision farming is variable-rate application of herbicides to optimize herbicide use efficiency and minimize negative off-site and non-target effects. site-specific weed management based on field scale management zones derived from soil characteristics known to affect soil-applied herbicide efficacy could alleviate challenges posed by post-emergence precision weed management. two commonly used soil-applied herbicides in dryland corn (zea mays l.) production are atrazine ...201318948474
spatial variability of western bean cutworm (lepidoptera: noctuidae) pheromone trap captures in sprinkler irrigated corn in eastern colorado.strategies for controlling pests are an integral part of any agricultural management plan. most field crops, such as wheat (triticum spp.) and corn (zea mays l.) are managed as if they are homogeneous units. however, pests within fields are rarely homogenous. development of plans that use targeted pest control tactics requires knowledge of the ecological drivers of the pest species. that is, by understanding the spatio-temporal factors influencing pest populations, we can develop management stra ...201122251644
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