Cal Poly's Irrigation Training and Research Center has developed a 22-video series that outlines how to fertilize crops through irrigation water (known as fertigation). The videos are available in English and Spanish on their YouTube channel and the ITRC website.

The video topics included in the series are:

• An overview of fertilization through irrigation water
• Basic fertilizer chemistry and vocabulary
• Nitrogen and the environment
• Basic soil principles
• Crop fertilization requirements
• Testing of plant soil and water
• Fertilizer labels, characteristics and usage
• Nitrogen conversions
• Volatilization of ammonia from irrigation water
• Irrigation system uniformity and efficiency
• Safety
• Purging media tanks of chemicals
• Calibration, titration and travel time
• Varying venturi injection rates
• Chemigation for soil infiltration problems
• SO2  generators (sulfur burners)
• Chemigation for drip system maintenance
• Incompatibility of different fertilizers
• Proportional injection
• Fertilizer and chemical injection devices
• Calibration of fertilizer and chemical injectors

ITRC also offers a free fertigation book that can be downloaded from the ITRC website.

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