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Creator:: Burket, John Zimmerman
Abstract:: Nitrogen availability in agricultural soils from fertilizer, plant residue inputs, and soil organic matter has important implications beyond crop yield. Legume winter cover crops and one fourth the recommended N rate on sweet corn resulted in yields equivalent to those at the recommended rate in the Willamette Valley of western...
Resource Type:: Dissertation
Full Text:: measured variables, and (b) principal components analysis of Willamette soils based on all measured

Creator:: Ndiaye, Evelyne L.
Abstract:: Responses of biological indicators of soil quality to winter cover cropping were measured on soil samples collected from 6 commercial growers' fields and two experiment research stations in the Willamette Valley of Oregon. The research stations were the North Willamette Research and Extension Center (Aurora, OR), and the Oregon State...
Resource Type:: Masters Thesis
Full Text:: weight loss. The major findings were: 1) microbial biomass carbon and B-glucosidase activity were the

Creator:: Islam, M. Mujibul
Resource Type:: Dissertation
Full Text:: is primarily in the B horizon, especially in soils that have been limed or treated with P and S

Creator:: Fernandes, Marcelo Ferreira
Abstract:: A method based on fatty acid (FA) analysis is used to profile microbial community structure (MCS). Various extraction protocols are available, which alter the types of FAs extracted from soils. The more time consuming but widely used protocol extracts only FAs from phospholipids (PLFA). This technique is desirable because PLFAs...
Resource Type:: Dissertation
Full Text:: PLFA (a) and MIDI (b). 31 1.5. MIDI:PLFA ratios based on the absolute amounts of FAMEs as a

Creator:: Kauffman, Susan Muna
Resource Type:: Masters Thesis
Full Text:: Appendix Appendix Appendix Appendix Appendix Appendix Appendix Appendix Appendix A: B: C: D: E: F: G: H: I

Creator:: Kucera, Jennifer Moore
Abstract:: Forest harvest can have significant impacts on forest ecosystems that may influence the capacity of soils to sequester carbon (C). The microbial community controls decomposition, which is a critical process in partitioning litter- and root-C between CO₂ and storage in semi-permanent soil-C pools. The objectives of this study were to...
Resource Type:: Dissertation
Full Text:: clear-cut 8 years ago in 1994; CC25 = stands that were clear-cut 25 years ago in 1977; "a" and "b

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