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Estimating Cover Crop Nitrogen and Choosing Organic Fertilizers for Your Farm

Published Apr. 5, 2013 | Discuss this article on Facebook
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Apr. 17, 2013 | 06:00 pm - 07:00 pm

Online Webinar

OEFFA will offer a free webinar designed for specialty crop farmers titled, “Estimating Cover Crop Nitrogen and Choosing Organic Fertilizers for Your Farm.”

Oregon State University Senior Instructor and Small Farms Extension agent Nick Andrews will guide participants through the Organic Fertilizer and Cover Crop Calculator, a free online tool which predicts the nitrogen released by cover crops, organic fertilizers, and compost, allowing farmers to easily compare the costs of different organic fertilizer programs. Andrews will explain the research behind the nitrogen mineralization models used in the calculator and demonstrate how this tool can be used to develop a cost-effective nutrient management program designed to address each farm’s specific crop nutrient requirements.

Andrews specializes in horticultural crops with a focus on vegetables and organic production, and has conducted applied cover crop research. He provides general advice for small farms, organizes beginning farmer training programs, and teaches composting workshops. He also edits the Oregon State University Small Farm website and regularly contributes articles to Oregon Small Farm News.

To register, go to

There is no charge to participate in the webinar, but pre-registration is required.

The event is part of a series of webinars and educational programs offered to specialty crop growers by OEFFA and the Cuyahoga Valley Countryside Conservancy. Partial funding for this webinar is provided through a grant from the Ohio Department of Agriculture, the State of Ohio, and the United States Department of Agriculture under the provisions of the Specialty Crop Block Grant.


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