FREP/WPH Nutrient Management Conference

Fertilizer Research and Education Program

For over 25 years, FREP has presented its pioneering fertilizer research at annual conferences. Since 2007, FREP has collaborated with the Western Plant Health (WPH) to create a conference that balances technical research with discussion on practical application. Presenters from academia, industry, and agricultural consulting provide general and technical information, current research and data, and practical applications addressing statewide and regional nutrient management issues.

31st Annual FREP/WPH Nutrient Management Conference

DoubleTree by Hilton Hotel, Modesto, CA, November 8-9, 2023

Registration is now open for the 31st Annual Nutrient Management Conference, hosted by the California Department of Food and Agriculture’s (CDFA) Fertilizer Research and Education Program (FREP) and Western Plant Health (WPH).

This year’s conference will be held at the DoubleTree by Hilton Hotel, in Modesto, CA, November 8-9, 2023, and includes a pre-conference tour of Duarte Nursery in Hughson, CA, on November 7.

Early conference registration (through October 27) is $215 and currently enrolled students pay $130. Late registration fees (after October 27) are $245 and $140 for students. Continuing education units (CEUs) for Certified Crop Advisers and Self-Certified Growers will be available for the conference. Upon registration, conference attendees can sign-up for the free nursery tour on November 7 (limited space available).

Irrigation and Nitrogen Management Plan (INMP) credits for the conference will be:

Nitrogen Management: 2 hrs
Irrigation Management: 2 hrs

CCA CEs available:

Nutrient Management: 3 hrs
Soil & Water Management: 3 hrs
Crop Management: 2 hrs

This year’s conference includes various presentations on irrigation and nutrient management in annual and perennial crops, research and outreach projects funded by FREP, a panel discussion on the challenges of nitrogen and water management in a wet year as well as workshops on pump efficiency testing and salinity management.

Call for Posters

A poster session will be held the evening of November 8 for undergraduate and graduate students, researchers, and industry members to present their ongoing California research, outreach and/or demonstration projects related to irrigation and nutrient management. FREP does not accept abstracts/posters related to proprietary product development, testing or promotions.

To present a poster at the conference, submit your abstract(s) to by October 27, 2023. One presenter per accepted abstract will receive complementary conference registration (Accepted Abstracts).

Abstracts must be related to irrigation and nutrient management in California. Submissions must include poster title, author names and affiliations, and an abstract (350-word limit).

We encourage individuals to prepare their abstracts according to the American Society of Agronomy Tips for Writing Abstracts .

Accepted abstracts: How to prepare your poster

To learn more about poster preparation, time and location of the poster session, please see the Poster Guidelines .


The Proceedings include a synopsis of FREP’s latest achievements, summaries of current FREP-funded projects and relevant research, and a list of completed FREP projects. See past Conference Proceedings.