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Nitrogen Fertility Options for Organic High Tunnels

Cordelia Machanoff, Program Aide
Cornell Vegetable Program

Last Modified: May 25, 2017

Nitrogen Fertility Options for Organic High Tunnels
It is transplant season for high tunnel tomatoes, particularly on farms that have just completed an early spring greens crop. Now is the time to plan for fertility for the longer season tomato crop. Conventional high tunnel growers can rely on soluble fertilizers which are injected through drip irrigation at a precise rate. However, organic tunnel fertility is more challenging, particularly in regards to long season nitrogen delivery. Most organic nitrogen sources are not injectable and must be applied prior to planting. These often come with unbalanced ratios of other nutrients such as phosphorus, calcium and magnesium. Several years of foliar sampling in high tunnel tomatoes throughout NYS has shown that organic high tunnel tomatoes generally start out with sufficient or even excess nitrogen, but go into a mid-season dive in foliar nitrogen levels.

Given the longer season and higher yields of tunnel tomatoes, a nitrogen fertilizer to inject or side-dress will help prevent mid-season deficiencies.

Our recommendations and pre-plant and in-season organic nitrogen sources are provided in the PDF below.

This work is part of a 2-year project between CCE Cornell Vegetable Program and NOFA-NY with support from the New York Farm Viability Institute.

Nitrogen Fertility Options for Organic High Tunnels, May 2017 (pdf; 1094KB)

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Upcoming Events

Precision Agriculture Series - Seneca County

February 7, 2020
March 3, 2020
April 3, 2020

Ovid, NY

Join Cornell Cooperative Extension to learn what precision agriculture entails, the economics of using precision ag, and the preferred methodology and benefits. This free, 3-day event series is being organized by CCE Seneca County with assistance from Dr. Ali Nafchi, Precision Ag Specialist of the CCE Cornell Vegetable Program and CCE NWNY Dairy, Livestock, and Field Crops team. Topics for each day will be determined by the audience interests and questions.

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Precision Agriculture Series - Erie County

February 19, 2020
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East Aurora, NY

Join Cornell Cooperative Extension to learn what precision agriculture entails, the economics of using precision ag, and the preferred methodology and benefits. This free, 3-day event series is being organized by CCE Erie County with assistance from Dr. Ali Nafchi, Precision Ag Specialist of the CCE Cornell Vegetable Program and CCE NWNY Dairy, Livestock, and Field Crops team. Topics for each day will be determined by the audience interests and questions.

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Precision Agriculture Series - Niagara County

February 4, 2020
February 18, 2020
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Lockport, NY

Join Cornell Cooperative Extension to learn what precision agriculture entails, the economics of using precision ag, and the preferred methodology and benefits. This free, 3-day event series is being organized by CCE Niagara County with assistance from Dr. Ali Nafchi, Precision Ag Specialist of the CCE Cornell Vegetable Program and CCE NWNY Dairy, Livestock, and Field Crops team. Topics for each day will be determined by the audience interests and questions.

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Announcements

Precision Agriculture Series

Learn what precision agriculture entails, the economics of using precision ag, and the preferred methodology and benefits. This free, 3-day event series will be presented by Dr. Ali Nafchi, Precision Ag Specialist of the CCE Cornell Vegetable Program and the CCE NWNY Dairy, Livestock, and Field Crops team. Topics for each day will be determined by the audience interests and questions.

The Precision Agriculture Series is being offered in several counties in our region. Pick a location that works for you! Find all of the locations on our Events page.

2019 Cornell Vegetable Program Year in Review

We closed out the decade with many accomplishments in 2019! We look forward to helping the New York vegetable industry in the new decade!

This year, our Specialists gave presentations at 104 events, sharing our knowledge with 3,936 people.

We continue to conduct on-farm research to help answer the questions of our growers. The Cornell Vegetable Program managed 38 research grants and projects in 2019. We extend our gratitude to the 107 farms and organizations that offered us land, labor, supplies, and generous financial contributions to support our trials!

We cannot forget to thank the 14 Cooperative Extension Associations that partnered with us this year too.

Our 2019 Year in Review brochure highlights our research and educational projects:
  • Design and Fabrication of an Affordable Laser Scarecrow
  • High Tunnel Research Increases Profits for New York Growers
  • Improved White Mold Management Guidelines for Snap, Lima, and Dry Beans
  • New Potato, Dry Bean, and Vegetable Storage Specialist Joins the Team
  • First Cornell Vegetable Program On-Farm Cabbage Herbicide Trial Explore Novel Approaches to Weed Control
  • Record-Low Insecticide Use in Muck Onion Production in 2019
  • Improving Produce Storage Quality through Forced Air Cooling
  • Mapping the Way to Better Disease Management


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