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Filtering by: Subject Soil enzymology -- Northwest, Pacific Advisor Sullivan, Dan M.

Nitrogen mineralization from organic amendments during the second year following application

Creator:

Kusonwiriyawong, Charirat

Abstract:

Estimates of nitrogen (N) available from long-term application of organic amendments are required to balance N inputs with crop N requirements. Two studies were conducted to (1) determine N mineralized from organic amendments (manures and composts) during year 2 after application, and (2) compare plant-available N (PAN) determined via in...

Resource Type:

Masters Thesis

Full Text:

degree of Master of Science in Soil Science presented on March 23. 2005. Title: Nitrogen Mineralization
Estimating the dry matter production, nitrogen requirements, and yield of organic farm-grown potatoes

Creator:

McQueen, John Paul Gainer

Abstract:

As part of a participatory research project, where farmers and Oregon State University researchers collaborated, aspects of potato (Solanum tuberosum L.) growing systems were studied. It was determined through conversations with the farmers that quantification of certain growth parameters of potato was lacking, including dry matter accumulation, crop nitrogen (N)...

Resource Type:

Masters Thesis

Full Text:

Utilization by Pacific Northwest Crops (Sullivan et al., 1999a) estimates that the soil N supply from