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Social and Behavioral Sciences Commons™
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Full-Text Articles in Social and Behavioral Sciences
Regional Dynamics Of Grassland Change In The Western Great Plains, Mark A. Drummond
Regional Dynamics Of Grassland Change In The Western Great Plains, Mark A. Drummond
Great Plains Research: A Journal of Natural and Social Sciences
This paper examines the contemporary land-cover changes in two western Great Plains ecoregions between 1973 and 2000. Agriculture and other land uses can have a substantial effect on grassland cover that varies regionally depending on the primary driving forces of change. In order to better understand change, the rates, types, and causes of land conversion were examined for 1973, 1980, 1986, 1992, and 2000 using Landsat satellite data and a statistical sampling strategy. The overall estimated rate of land-cover change between 1973 and 2000 was 7.4% in the Northwestern Great Plains and 11.5% in the Western High Plains. Trends in …
Physiological Responses Of Four Hazelnut Hybrids To Water Availability In Nebraska, Tala Awada, Scott Josiah
Physiological Responses Of Four Hazelnut Hybrids To Water Availability In Nebraska, Tala Awada, Scott Josiah
Great Plains Research: A Journal of Natural and Social Sciences
Responses of hazelnut hybrids (88BS, BOX1, Gl7, and GEL502) to water availability (watered and nonwatered) were examined in the field. The study site received 35% of long-term average precipitation between July and September. Photosynthesis (A), stomatal conductance (gs), water potential (Ψ), and specific leaf area were generally lower in the nonwatered than in the watered treatment and exhibited significant seasonal decline, which was accompanied by an increase in water use efficiency (WUE) under both water treatments. Hybrids exhibited different strategies to cope with water availability. The hybrid 88BS was more water conserving, with the most decline in g …