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FREP Resources

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.

• Drip (English) (Español)
• Micro-sprinkler (English) (Español)
• Impact Sprinkler (English) (Español)
• General Maintenance (English) (Español)

Nitrate Quick Test Instructions

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

• General Crop Management

• FREP Database

  This database aims to make the information contained in FREP research projects readily available, easily understandable, and convenient for implementation.

  CropManage

  CropManage is a free online decision support tool for irrigation and nutrient management recommendations. See the CropManage brochure.

  Vegetable Research & Information Center

  Information available by crop on production, including fertilization, pest management and harvest.

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• Fertilization

• California Fertilization Guidelines

  Fertilization guidelines based on research results from studies carried out in California and other similar locations.

  Making Field Specific Fertilizer Adjustments

  For an optimal fertilization plan, field-specific adjustments should be made based on expected yield, soil properties, weather conditions and crop management.

  Nutrient Source Specifics

  One-page factsheets, produced by IPNI, on fertilizer and nutrient sources.

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• Irrigation

• Wateright

  A multi-function, educational resource for irrigation water management. Resources include water balance and agricultural scheduling.

  Irrigation Water Nitrogen Contribution Calculator

  A tool for converting nitrate and ammonium concentration in applied irrigation water into pounds of nitrogen applied per acre.Â

  Evaluating Water Quality

  UCANR publication on self-evaluation techniques for water quality.

  CIMIS

  The California Irrigation Management Information System (CIMIS) was designed to assist irrigators in management and water use efficiency.

  Fertigation Book

  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.

  ITRC

  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

• Nitrogen Conversions for Soil and Water

  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.

  Nitrogen Concentrations in Harvested Plant Parts

  Literature review of over 70 crops to provide usable coefficients for converting yield to rate of N removal.

  Nutrient Content of Crops

  A tool for calculating the approx. amount of N, P and K that are removed by harvest.

  Irrigated Pasture Nitrogen Management & Planning

  Nitrogen management planning tool for irrigated pastures and an educational tool to assist CA growers in completing NMPs.

• Soils

• Soil Web

  An interactive web tool that provides soil survey information in a map format.

  Soil Agricultural Groundwater Banking Index

  This app identifies soils that are suitable for on-farm groundwater recharge in California.

  Soil Sampling Video Series

  Video series on soil sampling preparation, equipment and procedures.

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