Fertigation Course

Lesson 1 • Core Components of a Fertigation System

Identifies every hardware element from water source to emitter. Students can name, locate, and describe the function of each component.

Lesson 2 • Nutrient Movement in the Soil-Water System

Explains how dissolved nutrients travel through soil with irrigation water. Provides the physical basis for understanding nutrient placement and uptake.

Lesson 3 • What Fertigation Is and Why It Matters

Defines fertigation and contrasts it with broadcast fertilization. Establishes the agronomic and economic rationale that motivates the entire course.

Lesson 4 • Water Flow and Pressure Basics

Covers hydraulic principles governing flow rate and pressure in irrigation lines. Connects physics fundamentals to practical system sizing decisions.

Lesson 1 • Essential Macro- and Micronutrients

Covers the 17 essential plant nutrients, their roles, and deficiency symptoms. Provides the biological foundation for all fertilizer selection decisions.

Lesson 2 • Fertilizer Forms Suitable for Fertigation

Distinguishes solid, liquid, and suspension fertilizers by solubility and injectability. Students match fertilizer form to injection equipment and crop stage.

Lesson 3 • Fertilizer Compatibility and Reactions

Explains precipitation reactions, antagonisms, and safe mixing sequences. Prevents costly clogging and nutrient lockout in the field.

Lesson 4 • Reading and Interpreting Fertilizer Labels

Teaches guaranteed analysis, nutrient ratios, and safety data sheet interpretation. Enables accurate product selection and safe handling in the field.

Lesson 1 • Water Treatment for Fertigation

Covers acid injection for bicarbonate neutralization, chlorination for pathogen control, and filtration upgrades. Students design a treatment train for a given water profile.

Lesson 2 • Managing Salinity and Sodium Hazards

Explains leaching fraction calculation and gypsum application to manage soil salinity and sodicity. Protects long-term soil productivity under continuous fertigation.

Lesson 3 • Interpreting Water Analysis Reports

Guides students through a standard water analysis report, unit conversions, and flag interpretation. Connects lab data directly to fertigation program adjustments.

Lesson 4 • Key Water Quality Parameters

Defines pH, EC, hardness, bicarbonates, and sodium adsorption ratio as critical fertigation variables. Establishes acceptable ranges for each parameter.

Lesson 1 • Micro-Sprinkler and Bubbler Systems

Covers micro-sprinkler patterns, throw radius, and fertigation limitations. Students assess when micro-sprinklers outperform drip for specific crops.

Lesson 2 • Overhead and Center-Pivot Systems

Analyzes solid-set, linear-move, and center-pivot systems for large-scale fertigation. Highlights uniformity challenges and injection point placement.

Lesson 3 • Drip Irrigation for Fertigation

Examines surface and subsurface drip systems, emitter types, and flow uniformity. Establishes drip as the most precise fertigation delivery method.

Lesson 4 • System Selection Decision Framework

Provides a structured method to compare system types against crop, soil, water quality, and economic criteria. Students produce a justified system recommendation.

Lesson 1 • Venturi Injectors

Explains the pressure-differential principle driving Venturi suction and its flow limitations. Students size and install Venturi units for small to medium systems.

Lesson 2 • Injection System Calibration and Verification

Provides step-by-step calibration protocols and field verification tests for all injector types. Ensures nutrient delivery accuracy before crop application.

Lesson 3 • Proportional and Flow-Based Injection

Introduces flow-meter-triggered injection for proportional dosing regardless of flow variation. Links injection accuracy to irrigation scheduling precision.

Lesson 4 • Fertilizer Tanks and Bypass Systems

Describes pressure-differential tank operation and declining concentration behavior. Students calculate tank volume and refill intervals for a given application.

Lesson 1 • Soil and Tissue Testing for Program Design

Explains soil sampling depth, extraction methods, and tissue sampling timing. Test results form the quantitative basis for every nutrient rate decision.

Lesson 2 • Crop Nutrient Demand Curves

Maps nutrient uptake rates across vegetative, flowering, and fruiting stages for major crops. Aligns fertigation timing with peak crop demand periods.

Lesson 3 • Fertigation Scheduling and Frequency

Determines optimal injection frequency, event duration, and pre- and post-irrigation flushing. Maximizes nutrient placement in the active root zone.

Lesson 4 • Adjusting Programs Based on Monitoring

Uses in-season soil, tissue, and leachate data to refine nutrient rates and timing. Closes the feedback loop between monitoring and program adjustment.

Lesson 1 • Filtration Maintenance Protocols

Covers cleaning intervals, backwash procedures, and screen inspection for all filter types. Proper filtration maintenance is the primary defense against emitter clogging.

Lesson 2 • Troubleshooting Nutrient Delivery Failures

Diagnoses under- and over-application events caused by equipment malfunction or scheduling errors. Connects system performance data to crop response symptoms.

Lesson 3 • Diagnosing Clogging and Blockages

Provides a systematic diagnostic framework for physical, biological, and chemical clogging. Students trace blockage origin and apply the correct remediation treatment.

Lesson 4 • Emitter and Lateral Line Maintenance

Addresses emitter flushing, chemical cleaning, and lateral end-cap procedures. Maintains distribution uniformity throughout the growing season.

Lesson 1 • Automation and Controller Programming

Programs irrigation controllers for time-based, volume-based, and sensor-triggered fertigation events. Automation reduces labor and improves application consistency.

Lesson 2 • Fertigation in Protected and Soilless Systems

Adapts fertigation principles to greenhouse, hydroponic, and substrate-based production. Students design nutrient solutions and recirculation strategies for closed systems.

Lesson 3 • Precision Soil Moisture Monitoring

Integrates tensiometers, capacitance probes, and soil water potential sensors into irrigation scheduling. Reduces water and nutrient waste through real-time soil data.

Lesson 4 • Reducing Nutrient Losses to the Environment

Applies deficit irrigation, split application, and nitrification inhibitors to minimize nitrate leaching and runoff. Aligns production goals with environmental stewardship.