Inspection Services Blog

Research Update: Evaluation of Biochar

Note: This is part of a Research Update series that highlights projects funded by the Fertilizer Research and Education Program (FREP) annual grant program. Project Title: Evaluation of Biochar for On-Farm Soil Management in California Project Leaders: Danielle Gelardi, Sanjai J. Parikh, William R. Horwath, Daniel Geissler, Toby O’Geen, Kate M. Scow (UC Davis), Milt McGiffen (UC Riverside), Michelle Leinfelder-Miles (UC …


CDFA Awards $1.5 Million for Nutrient Management Projects through FREP Grant Program

The California Department of Food and Agriculture (CDFA) Fertilizer Research and Education Program (FREP) announces more than $1.5 million in grant funds are awarded to agricultural organizations and universities as a result of the FREP Grant Program 2019 grant cycle. These grants will fund seven research projects to improve the efficiency of nitrogen (N) fertilization in California agriculture, reduce the …


New Technical Advisory Subcommittee Members Appointed

We are pleased to welcome Lisa Hunt and Ben Faber to the Fertilizer Research and Education Program (FREP) Technical Advisory Subcommittee (TASC). We are also happy to announce that Steve Petrie has been reappointed to TASC. TASC is a group of scientific and technical experts who review and recommend projects for FREP funding. Steve Petrie Dr. Petrie’s professional experience related …


Now Accepting Proposals for 2020 Fertilizer Research and Education Program Grants

The California Department of Food and Agriculture’s (CDFA) Fertilizer Research and Education Program (FREP) is now accepting proposals for the 2020 grant cycle. FREP’s competitive grant program funds research and education to advance the efficient use of fertilizer materials and reduce environmental impacts associated with them. Two Requests for Proposals (RFPs) are being released for 2020: The Regular RFP includes …


Recap: The 2019 FREP/WPHA Nutrient Management Conference

The 27th annual Fertilizer Research and Education Program (FREP) and Western Plant Health Association (WPHA) Conference took place in Fresno, California, on October 28-30, 2019. Speakers from industry, academia and agricultural consulting provided pioneering information on nutrient and irrigation management in California agriculture. Below you will find highlights of some of the talks at this year’s conference. The PowerPoint presentations …


Registration Now Open for 27th FREP/WPHA Nutrient Management Conference

The California Department of Food and Agriculture’s (CDFA) Fertilizer Research and Education Program (FREP) and the Western Plant Health Association (WPHA) will host their 27th annual fertilizer research conference at the DoubleTree Hilton Hotel in Fresno, California, on October 28-30. The event includes a farm tour on October 28. This conference brings together industry professionals and academic researchers to learn …


2019 FREP/WPHA Conference: Save the Date and Call for Posters

Every fall, the California Department of Food and Agriculture’s Fertilizer Research and Education Program (FREP) and the Western Plant Health Association (WPHA) host a nutrient management conference. The agenda focuses on the latest FREP-funded research results and practical applications of fertilizing materials for agricultural production in the state of California. On October 28-30, 2019, the FREP/WPHA Conference will be held …


Updated Fertigation Book

In California agriculture, there has been a gradual shift from gravity-fed irrigation to pressurized systems including micro-irrigation. Micro-irrigation systems have been implemented in over 60% of irrigated acreage in California and support a more intensively managed production system. The use of pressurized irrigation systems has made significant advancements possible, including more precise delivery of chemicals and nutrients to crops. Chemigation …


Developing Nutrient Budget in Citrus Groves

Research Update: Developing Nutrient Budget and Early Spring Nutrient Prediction Model for Nutrient Management in Citrus Project leaders: Patrick Brown and Douglas Amaral Project location: Fresno, Tulare and Ventura Counties Year of study: 2 of 3 Overview: Leaf analysis with critical value* interpretation is a common practice for determining nutrient applications in citrus. However, this practice can lead to over-application …


Nitrate Quick Test

The nitrate quick test (NQT) is a cost-effective tool that can be used in nutrient management planning to determine the residual soil nitrate concentration. The results from the test can be used to improve fertilizer management and assist growers in accurately meeting crop needs. Here is an outline of the steps for preparing soil samples, conducting the test and calculating …