AgriSystems Activity Guide
Instructional Resource & Activity Bank
AgriSystems Activity Guide
High School Ag Science
Domestication to Industrial Production
Module 1: Origins, Geography & Global Agricultural Scale
Ground students in the historical transition from foraging to sedentary farming, global climatic distribution of staple crops and livestock, and the economic structural divergence between US and international farm operations.
1. Domestication Centers & Artificial Selection
Historical Agronomy
Vavilov Centers Mapping Lab
Students plot the 8 primary Vavilov centers of origin (Fertile Crescent, Mesoamerica, Yangtze/Yellow River, Andean) and trace 10 major staple crops & livestock (wheat, corn, rice, cattle, swine) to wild ancestors.
Deliverable: Dual-layer world map infographic with timeline & wild progenitor trait chart.
Domestication Syndrome Investigation
Worksheet comparing wild vs domesticated phenotypes (non-shattering rachis in wheat, reduced teosinte branching in maize, animal docility, floppy ears, cranial reduction).
Prompt: "Why did ancient farmers select traits that make plants unable to survive in the wild?"
2. Global Distribution & Climatic Breadbaskets
Geographic Economics
Breadbasket Biome Matching Activity
Students correlate climate zones (soil types, precipitation, growing degree days) with top grain belts (US Midwest, Ukrainian Chernozem, Brazilian Cerrado, Indo-Gangetic Plain).
Activity: Matrix worksheet matching temperature/water needs of soybeans, wheat, palm oil, and rice.
Trade Flow Simulation & Vulnerability
Interactive role-play: simulate global grain logistics when maritime chokepoints (Panama Canal, Malacca, Black Sea) face climate or geopolitical disruptions.
Discussion: Comparative advantage vs national food sovereignty in grain imports.
3. Farm Size, Productivity & Structural Economics
Data Analysis
US Commercial vs Global Smallholder Case
Analyze USDA ERS data vs Sub-Saharan Africa FAO metrics. Contrast average US farm size (~445 acres) with global median (<5 acres), examining capital vs labor intensity.
Metric Focus: Bushels per worker-hour vs yield per hectare (land vs labor productivity).
Farm Consolidation Socratic Seminar
Structured fishbowl debate: evaluate the economic causes (machinery capital costs, input volume discounts) and community effects of farm consolidation in rural America.
Prep Sheet: Students evaluate data on off-farm income reliance for small operators.
High School Ag Science Curriculum Toolkit Page 1 of 3 • Foundations & Global Systems AgriSystems Series
In-Depth Agronomy Module
US Grain Crop Production Systems
Corn, Soybeans & Wheat
Rotations, Tillage, Genetics & Tech
A. Crop Rotation Systems & Nitrogen Cycling
Soil Health & IPM
Class Activity • 4-Year Crop Rotation Architect: Students act as agronomists managing 1,200 acres. They design a multi-year rotation (Corn-Soybean, Corn-Soy-Wheat-Clover cover crop, or Continuous Corn) balancing gross revenue against fertilizer inputs.
Calculation Task: Calculate nitrogen credit from soybeans (30-40 lbs N/acre) and quantify synthetic nitrogen reduction versus continuous corn monoculture.
Worksheet • Pest Break & Disease Vector Analysis: Case study on Western Corn Rootworm adaptation (behavioral diapause & rotation-resistant variants) and Soybean Cyst Nematode suppression via non-host intervals.
Discussion: "Why do market grain prices often incentivize farmers to abandon optimal rotations for short-term mono-cropping?"
B. Tillage Systems: Conventional, Strip-Till & No-Till
Conservation Mechanics
Lab Simulation • Runoff & Soil Core Model: Students test water infiltration and particulate runoff across three trays simulating: 1) Moldboard plow (0% residue), 2) Strip-till (30% residue band), and 3) Continuous No-till (70%+ residue with cover crops).
Worksheet: Measure turbidity, calculate soil loss via RUSLE (Revised Universal Soil Loss Equation), and graph fuel consumption per acre across systems.
Agronomic Decision Matrix • Soil Cold & Wet Dilemma: Analyze why Northern Corn Belt farmers face soil warm-up delays under no-till and how strip-till offers a targeted compromise.
Prompt: "Debate the trade-offs: herbicide reliance in continuous no-till versus fossil fuel burn and erosion in conventional tillage."
C. Variety Selection: Hybrid Vigor & Trait Stacking
Genetics & Trait Stacks
Class Activity • Seed Catalog Decision Challenge: Provide authentic seed variety specification sheets (Relative Maturity 95-115 CRM, Bt rootworm/corn borer traits, Enlist/Xtend herbicide tolerances, drought-guard genetics).
Scenario Analysis: Assign student farm teams specific microclimates, pest histories, and growing seasons to select optimal seed hybrids and calculate bag tech fee ROI.
Worksheet • Refuge in a Bag (RIB) & Resistance Biology: Explore EPA refuge compliance requirements (5% vs 20% non-Bt refuge) to prevent insect resistance build-up.
Discussion: "How do stacked traits protect yield potential during severe abiotic stress like Midwestern summer flash droughts?"
D. Harvest Engineering & Post-Harvest Grain Storage
Precision Tech & Post-Harvest
Data Activity • Combine Telemetry & Yield Map Analysis: Students examine real precision yield monitor maps. Identify in-field yield variations caused by combine header loss, soil compaction, elevation changes, and drainage.
Calculation: Calculate harvest header loss by counting dropped kernels per square foot (2 kernels/sq ft = 1 bu/acre loss).
Worksheet • Grain Drying & Storage Economics: Model grain bin aeration and moisture shrink discounts. Corn harvested at 21% moisture must be dried to 15% for safe bin storage.
Decision Math: Compare the cost of commercial elevator drying/shrink penalties against on-farm propane batch drying and aeration management.
High School Ag Science Curriculum Toolkit Page 2 of 3 • Grain Crop Systems AgriSystems Series
In-Depth Animal Science Module
US Livestock Systems & Industry Integration
Beef, Dairy, Swine & Poultry
Breeds, Feed Conversion & Supply Chains
5. Species & Breed Selection Strategies
Genetics & Production Targets
The Breed Matchmaker Matrix
Students evaluate specialized commercial livestock breeds across 4 production categories, matching genetic traits to environmental and market needs:
- Beef: Black Angus (marbling/CAB) vs Brahman (heat/parasite tolerance) vs Charolais (terminal growth).
- Dairy: Holstein (bulk fluid milk volume) vs Jersey (high butterfat/protein solids).
- Swine: Landrace/Chester White (maternal traits) vs Duroc (muscling, terminal sire).
- Poultry: Cornish Cross (rapid 42-day broiler meat) vs White Leghorn (egg efficiency).
Worksheet: Crossbreeding plans demonstrating heterosis (hybrid vigor) in F1 terminal calves.
Feed Conversion Ratio (FCR) Lab
Students compute and compare nutritional efficiency across species to produce 100 lbs of live weight gain:
Broiler Poultry: ~1.7 : 1 FCR
Commercial Swine: ~2.8 : 1 FCR
Feedlot Beef (grain finish): ~6.0 : 1 FCR
Discussion Question: "How do anatomical digestive systems (monogastric vs ruminant) dictate what feedstuffs each species can utilize?"
6. Vertical Integration & Supply Chain Economics
Supply Chains & Policy
Broiler Contract Grower Simulation
Role-play the relationship between an agricultural integrator (Tyson/Pilgrim's) and an independent contract grower. Students audit an authentic contract breakdown:
Integrator supplies: Chicks, feed, medication, tech supervision.
Grower supplies: Land, million-dollar barn capital, labor, utility bills, litter disposal.
Worksheet: The "Tournament System" payment calculation and grower risk analysis.
Industry Comparison: Poultry vs Beef
Students diagram why poultry is >90% vertically integrated while beef cattle remains largely fragmented across independent cow-calf operations, stockers, and feedlots:
• Biological cycle duration (broiler: 6 wks vs steer: 18-24 mos).
• Land grazing requirements vs confinement barn scale.
Debate Prompt: "Does vertical integration increase supply chain efficiency at the expense of farmer autonomy?"
Capstone Project: The Integrated Farm Enterprise Plan
Multi-Day Synthesis
Student teams receive an imaginary 2,500-acre Midwestern property. They must specify: 1) A 3-crop rotation with tillage & cover crop protocols, 2) Specific hybrid seed & refuge strategies, 3) On-farm harvest/storage infrastructure, 4) A livestock finishing enterprise (beef feedlot vs contract swine) with breed rationale & manure nutrient cycling back to crop acres.
High School Ag Science Curriculum Toolkit Page 3 of 3 • Livestock & Integration Systems AgriSystems Series
