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Filtering by: Creator Summers, Ed Academic Affiliation Crop and Soil Science Committee Member Dick, Richard Decade 1990-1999

Impact of a red clover winter cover crop on carbon and nitrogen mineralization by microorganisms in soil aggregates

Creator:

Ndiaye, Aissatou

Abstract:

Although legumes have been widely studied for their nitrogen-fixing ability, it is uncertain to what extent legume cover crops achieve their nitrogen-fixing potential under the climatic conditions encountered in western Oregon. Furthermore, it is unknown what factors control the proportions of legume cover crop N that are either sequestered into...

Resource Type:

Masters Thesis

Full Text:

to the N requirements of the following summer crop. Soil was sampled in mid-September 1997, after
Long-term effects of tillage, nitrogen, and rainfall on winter wheat yields

Creator:

Camara, Kelli Marie

Abstract:

Winter wheat is commonly grown in dryland cropping systems in the Pacific Northwest region of semi-arid eastern Oregon. For agronomic, economic, and environmental reasons, it is important to understand the long-term sustainability of such dryland systems. The objective of this study was to evaluate the long-term effects of tillage, nitrogen...

Resource Type:

Masters Thesis

Full Text:

research experiments in the western United States. The experiment consisted of a winter wheat-summer