Nick Andrews

Tenga en cuenta que es posible que esta persona no hable español.

Photo of Nick in a vegetable field
he/him/his

Organic Vegetable Extension

Tenga en cuenta que es posible que esta persona no hable español.

503-913-9410
[email protected]

Expertise: Organic agriculture , Soil , Vegetables and specialty seeds , Insects

Programs: OSU Small Farms

Links: OSU Organic Agriculture , Organic Fertilizer & Cover Crop Calculator , Croptime , Western Cover Crops Council

Department/Unit: Horticulture

Biography

In 2020 Nick started serving as an OSU Organic Vegetable Extension specialist, from 2005 to 2019 he was a Small Farms Extension agent serving the Portland Metro-area. His work focuses on organic vegetable production including applied research on cover crops, nutrient management, vegetable degree-day models, and pest management. With colleagues he developed the OSU Organic Fertilizer & Cover Crop Calculator and Croptime. He is active in the Western Cover Crops Council, currently serving as Secretary.

Content by Nick Andrews

Cover crops improve soil and support pollinators over winter

Fall planting boosts soil health, suppresses weeds and supports pollinators.

Kym Pokorny | Sep 16, 2025 | News story

OSU builds home for organic agriculture research and outreach

A six-member faculty team supports organic and ecological farming statewide.

Chris Branam | Apr 10, 2025 | News story

OSU collaboration boosts innovation in cover crop technology

OSU engineering students partner with Extension to make interseeding tech affordable for small farms.

Henry Carnell | Aug 20, 2024 | News story

Extension field day highlights use of canines to detect voles

Dogs and raptors help farmers manage damaging vole populations.

Francesca Lear | May 30, 2024 | News story

OSU tools help organic farmers improve nutrient management and cut costs

The OSU Organic Fertilizer and Cover Crop Calculator helps farmers estimate nitrogen release from cover crops and the cost of managing cover crops.

Dan M. Sullivan, Nick Andrews | Mar 2024 | Impact story

IPM Strategic Plan for Fresh Market Brassicas in Northwest Oregon and Southwest Washington

Growing brassicas crops in Oregon and Washington requires whole-season management to control pests. Learn how integrated pest management can neutralize pests and improve crop yields.

Chris Hedstrom, Cynthia M. Ocamb, Nick Andrews, Kristine Buckland, Heidi Noordijk, Silvia I. Rondon | Nov 2023 | OSU Extension Catalog

Make compost that really cooks: troubleshoot heat, odor and pests

OSU Extension compost expert explains how to build a hot, healthy pile — and fix the most common problems.

Kym Pokorny | Aug 24, 2023 | News story

Soil Nitrate Testing for Willamette Valley Vegetable Production

A soil nitrate test measures the concentration of nitrate in the soil at a specific moment in time, including nitrate originating from organic inputs, fertilizer, and soil organic matter. This publication describes ...

Dan M. Sullivan, Nick Andrews, Aaron Heinrich, Ed Peachey, Linda Brewer | Aug 2023 | OSU Extension Catalog

Developing Oregon’s winter vegetable market project fills need

Oregon farmers are now successfully selling rot-resistant winter squash varieties into January and later.

Alexandra Stone, Lane Selman, Nick Andrews | Apr 2023 | Impact story

Turn livestock manure into rich compost for your garden

Turn barnyard byproducts into garden gold with safe composting.

Kym Pokorny | Mar 9, 2023 | News story

Winter Vegetable Production on Small Farms and Gardens West of the Cascades

The mild climate west of the Cascades allows farmers and gardeners to grow many winter-hardy crops in the field for winter and spring harvest. A wide range of alliums, leafy greens, brassicas and root crops do...

Nick Andrews, Heather Stoven, Heidi Noordijk, Lane Selman, Kelly Streit, Brooke Edmunds, Neil Bell, Victoria Binning | Jun 2022 | OSU Extension Catalog

Medicinal herb production in the Pacific Northwest

Medicinal herb crops are a diverse group consisting of both annual and perennial species. Some herbs are harvested for their flower or leaf tissue; others are harvested for root tissue or fruit. Within the herb...

Kristine Buckland, Ben Marx, Peg Schafer, Alexandra Stone, Nick Andrews, Ann Rasmussen | Jan 2026 | OSU Extension Catalog

Agricultural composting and water quality

Learn how to conduct efficient, cost-effective, on-farm composting that presents reduced risk to surface and groundwater quality.

Linda Brewer, Nick Andrews, Dan M. Sullivan, Will Gehr | Jul 2024 | OSU Extension Catalog

Vegetable degree-day models: An introduction for farmers and gardeners

Degree-days help predict plant development based on heat accumulation. Learn how Croptime, an online tool, uses models to improve vegetable farming and weed management.

Nick Andrews, Leonard Coop, Heather Stoven, Heidi Noordijk, Aaron Heinrich | Feb 2025 | OSU Extension Catalog

Estimating plant-available nitrogen release from cover crops

This publication helps Western Oregon farmers and agricultural professionals determine the nitrogen fertilizer replacement value of winter cover crops. Learn plant-available nitrogen basics and gain from Willamette Valley case studies.

Dan M. Sullivan, Nick Andrews, Linda Brewer | Oct 2025 | OSU Extension Catalog

OSU organic fertilizer & cover crop calculator: Predicting plant-available nitrogen

Describes the OSU Organic Fertilizer & Cover Crop Calculator and using it to predict plant-available nitrogen.

Dan M. Sullivan, Nick Andrews, Clare Sullivan, Linda Brewer | Mar 2023 | OSU Extension Catalog

An introduction to whole farm systems design

Whole farm systems are a departure from American industrial agriculture. Whole farming takes into consideration a farming pattern that is based on diversity — biological, economical and social. Here's a guide.

Maud Powell, Nick Andrews, Melissa Matthewson, Shelley Elkovich, Gwendolyn Ellen, Tim Franklin, Don Tipping | May 2024 | OSU Extension Catalog

Is composting a good fit for your small farm?

Compost can quickly improve degraded soil and reduce weeds, pathogens and pests. But a large-scale composting program on a small farm can be labor-intensive and costly. Here's how to decide if it's a viable option.

Nick Andrews | Mar 2024 | OSU Extension Catalog

Wireworm: Biology and Nonchemical Management in Potatoes in the Pacific Northwest

Wireworms are among the most destructive of soil insect pests. This publication explains the wireworm life cycle and describes a program for monitoring and risk assessment. Nonchemical management methods are suggested,...

Nick Andrews, Mario Ambrosino, Glenn Fisher, Silvia I. Rondon | Mar 2023 | OSU Extension Catalog

What's Wrong with my Potato Tubers? Diagnosing Tuber Abnormalities in Western Oregon and Washington

Describes and illustrates (color photos) tuber damage caused by insect pests, plant diseases, and physiological disorders.

Lane Selman, Nick Andrews, Alexandra Stone, Al Mosley | Jul 2021 | OSU Extension Catalog

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