Guide to Revising

Revision – funnel your knowledge…

🧠 “Build your revision like a funnel — start wide with full notes, narrow it down to a clear guide, then finish with a short summary to keep the key points sharp for your practical.”

Revision process

🛠️ PREP STAGE – NOTES 

Collect everything you need. 

💡 BOOST STAGE – GUIDE 

Streamline what matters. 

🎯 LAUNCH STAGE – SUMMARY 

Focus on the essentials for your practical.

In farming terms….

“Grow your knowledge, harvest your confidence!”

🌱 Notes – Sowing ideas 

🌾 Guide – Growing understanding 

🚜 Summary – Harvesting key points
Downloads

Crop Technician Knowledge Revision Guide.
Crop Technician Revision Guide
🌾 Crop Technician Apprentice Revision Guide
🌱 UK Crops

Main Crop Groups

The UK grows a diverse mix of cereals, root crops, pulses and vegetables. Apprentices should know key growth stages, soil requirements, major pests and diseases, and harvest indicators.

  • Cereals: wheat, barley, oats — focus on disease control, drilling windows, nitrogen timing.
  • Oilseeds: mostly OSR — flea beetle risk, establishment challenges.
  • Potatoes: blight management, irrigation, soil preparation.

Quick Check

  • Which crop is most vulnerable to cabbage stem flea beetle?
  • What are the three main cereals grown in the UK?
  • Why are pulses important for soil fertility?
  • Oilseed Rape (OSR)
  • Wheat, Barley, Oats
  • They fix nitrogen and improve soil fertility
🌿 Agronomy

What Agronomy Covers

  • Crop Growth Factors: light, water, nutrients, temperature.
  • Stress Diagnosis: nutrient deficiency spotting, pest/disease symptoms.
  • Field Walking: thresholds, identification skills, using crop monitoring tools.

Quick Check

  • Name two abiotic stresses and two biotic stresses.
  • What is a treatment threshold?
  • Why is field walking essential for crop health?
  • Abiotic: drought, frost; Biotic: aphids, fungal diseases
  • The point where pest/disease requires action
  • To detect issues early and guide management decisions
🌾 Crop Nutrition
  • Plant Nutrition: N, P, K, Mg, S plus micros like Mn, Cu, B.
  • RB209: guidelines for fertiliser planning.
  • Fertiliser Types: straight, compound, organic, controlled release.
  • Liming: correcting low pH to maximise nutrient uptake.

Quick Check

  • What nutrient is most commonly deficient on high pH soils?
  • How does soil pH affect nutrient availability?
  • What does RB209 help farmers decide?
  • Iron (Fe)
  • High pH can lock up nutrients making them unavailable
  • Fertiliser type and application rates
🧱 Soil
  • Soil Basics: texture, structure, organic matter, biota.
  • Soil Survey: assessing type, pH, nutrient levels, maps.

Quick Check

  • What is the ideal pH for most arable crops?
  • Why is organic matter important?
  • How does compaction affect yield?
  • 6–7
  • Improves structure, nutrient retention, water holding
  • Reduces root growth and drainage, lowering yield
🚜 Crop Husbandry
  • ICM: biological, cultural and chemical tools combined.
  • Rotations: break pest cycles, manage weeds, improve soil.
  • Growth Stages: GS30/31 for N timing, GS39 flag leaf protection.
  • Varieties: disease ratings, maturity, yield potential.
  • Chemical Control: safe use, labels, application timing.

Quick Check

  • Why is GS39 a key timing for fungicides?
  • Name one benefit of long rotations.
  • What factors affect variety choice?
  • Protects flag leaf for maximum yield
  • Reduces disease and weed pressure
  • Disease resistance, maturity, soil type, market demand
⚠️ Health & Safety
  • Machinery competence and safe stop procedures.
  • Tractor attachments and safe hitching.
  • Risk assessments for field tasks.
  • Biosecurity to prevent spread of pests & disease.
  • Understanding legal responsibilities.

Quick Check

  • What is the Safe Stop procedure?
  • Name two key biosecurity actions.
  • Why are guards essential on PTO shafts?
  • Turn off engine, lower implements, disengage PTO, apply brakes
  • Clean equipment, restrict visitor access
  • Prevent entanglement injuries
📊 Enterprise Performance & KPIs
  • Gross Margin: output minus variable costs.
  • KPIs: yield/ha, cost per tonne, nitrogen use efficiency, labour hours.
  • Benchmarking: comparing performance to industry standards.

Quick Check

  • What is included in variable costs?
  • How is gross margin calculated?
  • Why is benchmarking useful?
  • Seed, fertiliser, sprays, fuel, labour
  • Gross Margin = Output – Variable Costs
  • To compare performance and identify improvements