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Nitrogen Management Plan Information Sources

Nitrogen Management Training for Grower Nitrogen Management Plan Self-Certification

Note: if you need to take a training, please call 530-934-8036 or visit the CURES website to see available trainings in the Central Valley.

  • For Continuing Education Unit information, please call 530-934-8036 or visit the CURES website to see available CEU events in the Central Valley.

Fertility management guidance via Fertilizer Research and Education Program (FREP)
These guidelines are based on research results from studies carried out in California and elsewhere. Detailed information is summarized in a user-friendly, easily searched interactive database. Information for cotton, wheat, corn, rice, walnuts, grapevines, lettuce, almonds, processing tomatoes, alfalfa, strawberries, cauliflower and broccoli is available. Crops continue to be added.

University of California Resources – UC Nutrient Management for Fruit, Nut & Vegetable Crops
Search by crop or by topic for information. Links to UC publications with nutrient management guidance prepared by UC Farm Advisors and Researchers.

Specific Crops:
UC Fruit and Nut Research and Information Center
UC Vegetable Research and Information Center

USDA Tool to Calculate Nutrient (N, P, K) Removal by Harvested Crop
This Crop Nutrient Tool has information about N, P, and sometimes K of crop residues. Need to input yield and know what the harvested portion is.

International Plant Nutrition Institute Crop Nutrient Removal Calculator app for iPhone or iPad
Download the FREE app from the “App Store” or “iTunes” to your iPhone or iPad. About 80 crops are available, but be aware that some are listed in components (such as sugarbeet tops and sugarbeet roots) that you would need to add together if all components are removed from the field.

IPNI Nutrient Source Specifics
Fact sheets on common synthetic fertilizer materials.