Life Sciences Commons^™

Growth And Water Relations Of Mountain Big Sagebrush On Reclaimed Mine Soils In Southwestern Wyoming, Alan T. Carpenter

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Mined-land reclamation practices in shrub-steppe ecosystems can be augmented by planting seedlings of locally dominant shrubs, e.g., mountain big sagebrush. Dispersion pattern could affect sagebrush performance by influencing amounts of windborne snow, soil and litter which accumulate around shrubs and by influencing water withdrawal by roots. Mountain big sagebrush seedlings were planted in plots on a reclaimed coal strip mine in two dispersion patterns: singly and in clumps of four at the same overall density.

Performance of mountain big sagebrush was monitored during two growing seasons. Measures included plant survival, end-of-growing season aboveground biomass, leaf water potential components, soil water …

The Acarau Valley In Northeast Brazil: Vegetation, Soils And Land Use., Joao Stacishin De Queiroz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to describe and characterize the principal kinds of land in the mid-portion of the Acarau Valley, Ceara State, Northeast Brazil. The specific aims were: (1) to develop a specific-purpose soil classification; (2) to investigate vegetation-environment relationships; (3) to develop hypotheses about short-term vegetation dynamics; and (4) to evaluate the usefulness of computer processed multispectral-scanner (MSS) data for mapping rangeland resources in Northeast Brazil.

Fifty-one soil profiles were described and ocular estimates of vegetation cover by species were made at each subjectively selected site. Two Landsat scenes were used to assess the usefulness of MSS …

Acidification Sources In Red Alder And Douglas-Fir Soils -- Importance Of Nitrification, H. Van Miegroet, D. W. Cole

Watershed Sciences Faculty Publications

Precipitation, throughfall, forest floor, and soil leachate samples were monitored continuously in 1981 and 1982 in a N-poor Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] forest and a red alder (Alnus rubra Bong.) forest growing adjacently on a glacial soil in western Washington. The purpose of the study was to quantify the relative importance of atmospheric vs. natural sources of H+ input to forest soil acidification, and to determine the role of N transformation processes in the overall H+ balance of soils with different N status. Rainwater samples had an avg pH of 4.7 and annual H+ deposition via precipitation averaged 320 …