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Filtering by: Subject Organic fertilizers Creator Mcqueen, John Paul Gainer

Estimating nitrogen mineralization in organic potato production

Creator:

Oregon State University. Extension Service, Sullivan, Dan M. (Dan Matthew), 1954-, McQueen, John Paul Gainer, and Horneck, Donald Arthur

Abstract:

Potatoes require adequate nitrogen to produce quality tubers and high yields. Organic farming practices are designed to build soil nutrient levels gradually. In organic systems, nitrogen (N) enters the soil in the form of crop residue and amendments (e.g., manures, composts, and specialty products). Much of the N added to...

Resource Type:

Technical Report

Full Text:

Extension Service. Corvallis, OR. http://smallfarms.oregonstate. edu/organic-fertilizer-calculator OSPUD
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:

participating farms as a group. A concern for the small organic farm is the need to make fertilizer