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FREP Resources
Fertilizer Research And Education Program
Irrigation Maintenance Checklists
FREP has published irrigation maintenance checklists for various systems. These checklists summarize important aspects of pressurized systems to maintain and inspect while they are operating. They can be a useful tool for growers and irrigators to print and reference when running irrigation sets so that they can best insure that the system is performing optimally.
The nitrate quick test is a cost-effective way to determine soil nitrate concentration, which may be used to improve fertilizer management.
Field Day Guide
Made for FREP-funded projects, this guide explains how to host a field day and effectively increase project outreach.
Nutrient Management Links
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General Crop Management
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This database aims to make the information contained in FREP research projects readily available, easily understandable, and convenient for implementation.
CropManage is a free online decision support tool for irrigation and nutrient management recommendations. See the CropManage brochure.
Information available by crop on production, including fertilization, pest management and harvest.
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Fertilization
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Fertilization guidelines based on research results from studies carried out in California and other similar locations.
For an optimal fertilization plan, field-specific adjustments should be made based on expected yield, soil properties, weather conditions and crop management.
One-page factsheets, produced by IPNI, on fertilizer and nutrient sources.
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Irrigation
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A multi-function, educational resource for irrigation water management. Resources include water balance and agricultural scheduling.
A tool for converting nitrate and ammonium concentration in applied irrigation water into pounds of nitrogen applied per acre.Â
UCANR publication on self-evaluation techniques for water quality.
The California Irrigation Management Information System (CIMIS) was designed to assist irrigators in management and water use efficiency.
Topics include injection hardware and techniques, back flow prevention, N, P, and K injection, drip system maintenance, gypsum injection, and specifications for various irrigation methods.
The Irrigation training and Research Center offers hands-on courses, books and equipment, and weather and ET data.
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Nitrogen Management Plan
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Worksheet produced by the West Side SJR Watershed Coalition that provides tables for converting N measurements in soil and water to determine equivalent application values.
Literature review of over 70 crops to provide usable coefficients for converting yield to rate of N removal.
A tool for calculating the approx. amount of N, P and K that are removed by harvest.
Nitrogen management planning tool for irrigated pastures and an educational tool to assist CA growers in completing NMPs.
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Soils
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An interactive web tool that provides soil survey information in a map format.
This app identifies soils that are suitable for on-farm groundwater recharge in California.
Video series on soil sampling preparation, equipment and procedures.