Index Catalog // ScholarsArchive@OSU

Creator:: Sullivan, Dan M. (Dan Matthew), 1954-, Andrews, N. (Nick), and Oregon State University. Extension Service
Abstract:: This publication assists western Oregon farmers and agricultural professionals in determining the nitrogen fertilizer replacement value of winter cover crops. Includes information on plant-available nitrogen (PAN) basics; a site-specific, step-by-step method to estimate PAN; Willamette Valley case studies; and appendices summarizing Willamette Valley cover crop research that supports these PAN...
Resource Type:: Technical Report

Creator:: Nelson, Machelle A.
Abstract:: A better understanding of grass seed crop and soil fertility is necessary to improve fertilizer practices and preserving water quality in Willamette Valley, Oregon, where 55% of land-use is in grass seed production that directly impacts adjacent waterways containing native protected fish species. I determined tillage effects on soil N...
Resource Type:: Masters Thesis

Creator:: Oregon State University. Extension Service and Sullivan, Dan M. (Dan Matthew), 1954-
Abstract:: Nutrient management plans for crops require estimates of plant-available nitrogen (PAN) provided by application of manure or compost. Recent developments have stimulated interest in utilizing manure nitrogen (N) as a resource. These factors include the following: • Increased cost of N fertilizers • Increased value of PAN from manure on...
Resource Type:: Technical Report

Creator:: Thiel, Aaron L.
Abstract:: Silvicultural canopy gaps are emerging as an alternative management tool to accelerate development of complex forest structure in young, even-aged forests of the Pacific Northwest. I investigated patterns of nitrogen (N) availability along transects through 0.1 and 0.4 ha silvicultural gaps in three 50-70 year old Douglas-fir forests of western...
Resource Type:: Masters Thesis

Creator:: Sinkhorn, Emily R.
Abstract:: Understanding how N availability influences base cation stores is critical for long-term ecosystem sustainability. Indices of nitrogen (N) availability and the distribution of nutrients in plant biomass, soil, and soil water were examined across ten young, unpolluted Douglas-fir (Pseudotsuga menziesii) stands in the Oregon Coast Range spanning a three-fold soil...
Resource Type:: Masters Thesis

ScholarsArchive@OSU