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 4 of 4 for “"field border"”.
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Urea Hydrolysis in Soil Profile Toposequences: Mechanisms Relevant to Nitrogen Transport and Water Quality
… of soil profiles that lie between agricultural fields and surface waters, particularly in sandy Coastal Plain regions. Laboratory studies were conducted to determine the most influential soil chemical characteristics predicting rates of urea hydrolysis in six Maryland soils. Soils were sampled …
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The Spatial Trends of Japanese Beetles in Illinois Soybean Fields and Their Effects on Sampling and Production
… in Illinois soybean, Glycine max (L.) Merr., fields to determine the spatial trends of Japanese beetles, Popillia japonica Newman, and to measure their impact on soybean production. Commercial soybean fields were sampled intensively or extensively. Densities and distributions of Japanese …
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Pest management of billbugs in orchardgrass grown in Virginia
… for this crop. Over two seasons, orchardgrass fields were surveyed for paired feeding holes caused by feeding of the billbug spring adult. Simultaneously, barrier pitfall traps, a standard method for determining the presence of billbugs in orchardgrass, were used to trap billbug adults in the …
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Assessing adaptive winter behaviors of beneficial arthropods, with a focus on the long-distance migratory ecology of Nearctic hover flies (Diptera: Syrphidae)
… while Chapter 3 examines the effects of field borders on arthropod natural enemy communities. Syrphid hover flies of the subfamily Syrphinae are an important group of arthropods. Adults are pollinators for a variety of crop and non-crop plant species, while larvae act as biological …