Pasture establishment, grazing and carrying capacity
Compare extensive and intensive grazing, calculate basic stocking pressure and explain how pasture can be improved and protected.
Exam scope and assessment notes
Use this original lesson for the listed 2026, 2027–2028 and 2029–2031 Cambridge syllabus cycles. This route maps Cambridge's 2026 Version 2, 2027–2028 Version 1 and 2029–2031 Version 1 syllabuses. The 2026 update changes only a weblink; Cambridge reports no significant teaching changes for the 2027–2028 or 2029–2031 cycles. Exams are in the November series, and the qualification is not available in every administrative zone; confirm entry with your centre. Centre-selected local crop, weed, pest, disease and livestock examples must be checked against local agriculture. StudyForA does not replace supervised, risk-assessed practical work, the four assessed practical exercises, the individual practical investigation/report, teacher assessment or Cambridge moderation. Online practice is not an official mark or grade.
Before you begin
- Read the syllabus that matches your exam year and confirm your centre can enter you for code 0600. This route maps Cambridge's 2026 Version 2, 2027–2028 Version 1 and 2029–2031 Version 1 syllabuses. The 2026 update changes only a weblink; Cambridge reports no significant teaching changes for the 2027–2028 or 2029–2031 cycles. Exams are in the November series, and the qualification is not available in every administrative zone; confirm entry with your centre. Centre-selected local crop, weed, pest, disease and livestock examples must be checked against local agriculture. StudyForA does not replace supervised, risk-assessed practical work, the four assessed practical exercises, the individual practical investigation/report, teacher assessment or Cambridge moderation. Online practice is not an official mark or grade.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
What can happen when stocking rate exceeds carrying capacity?
What you will learn
- Describe grazing and browsing vegetation and how improved pasture is established.
- Define paddock, rotational and zero grazing, enclosed and unenclosed systems, and intensive and extensive grazing.
- Explain carrying capacity, stocking rates, overstocking, bush control, fire risk, fencing and rotation.
Describe pasture and establishment
Grazing land may include grasses and legumes eaten by livestock and woody bush browsed by some animals. Improved pasture is established by selecting suitable species, preparing and sowing the site, managing weeds and soil, and allowing plants to establish.
Species, seed, timing and management must suit local climate, soil, livestock and ecology; use regional recommendations.
Compare grazing systems
A paddock is a fenced subdivision of grazing land. Rotational grazing moves animals between paddocks to manage grazing and recovery; zero grazing brings cut forage to animals. Enclosed systems use boundaries, while unenclosed systems allow open-range movement.
Intensive and extensive describe different management intensity and land use. They are not synonymous with good or bad: productivity, labour, cost, welfare and environmental effects vary.
Manage stocking and pasture use
Stocking rate is the number of animals per unit area over a period. Carrying capacity is the number that land can support sustainably under stated conditions. Overstocking can reduce cover, damage soil and lower future feed supply.
Fencing and rotation can improve pasture use and allow recovery. Bush control and fire require ecological, safety and legal judgement; fire can damage soil, habitat and property when misused.
Sources for this lesson
Pause and explain
What can happen when stocking rate exceeds carrying capacity?
Worked example
A pasture is grazed continuously, becomes bare near water points and has lower grass cover each season. Explain two likely causes and a management comparison.
Show the worked solution
- Repeated grazing can prevent recovery, and animals may concentrate near water, increasing local pressure.
- The stocking rate may exceed the land's current carrying capacity, especially in dry seasons.
- Evaluate rotation, paddock access, water-point layout and stocking against local forage and rainfall evidence.
Answer Concentrated or excessive grazing can reduce cover and recovery. Fencing and rotation may improve use if stocking and recovery periods fit local pasture growth.
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
A farm has 60 goats on 12 hectares of pasture. Calculate the stocking rate and explain why this figure alone does not establish carrying capacity.
Give me a hint
Divide animal number by area and state the units and time assumption.
Compare my reasoning
- Calculate 60 ÷ 12 = 5 goats per hectare for the stated period.
- Stocking rate describes use; carrying capacity depends on forage production, season, soil, rainfall and management.
- Compare the rate with local pasture monitoring and animal requirements before deciding whether it is sustainable.
The rate is 5 goats per hectare. It cannot by itself show sustainability because pasture supply and conditions vary.
Look for these in your work
- Calculation correct
- Units included
- Rate distinguished from capacity
Compare rotational grazing with continuous grazing for a pasture showing bare patches around water points.
Give me a hint
Consider recovery, animal distribution, fencing cost and monitoring.
Compare my reasoning
- Rotation can give grazed areas recovery time if paddocks and movement are managed well.
- Continuous grazing is simpler but may concentrate animals and prevent some plants from recovering.
- Check forage growth, season, water placement, animal welfare and fencing cost before changing the system.
Rotation may improve recovery and distribution, while continuous grazing is simpler but can concentrate pressure. Site evidence and costs matter.
Look for these in your work
- Both systems compared
- Recovery explained
- Practical constraints included
A dry season is forecast. Propose a pasture monitoring plan that could inform a safe stocking decision without prescribing a universal animal number.
Give me a hint
Track forage, ground cover, water, animal condition and changes over time.
Compare my reasoning
- Record pasture cover and available forage at representative points.
- Monitor rainfall, water access, grazing pressure and animal body condition.
- Review records with local extension or veterinary advice and adjust the plan before vegetation or animal welfare declines.
A stocking decision should respond to current forage and animal condition, not a fixed number copied from another location.
Look for these in your work
- Several indicators tracked
- Seasonal change considered
- Local advice included
Common mistakes
- Equating carrying capacity with a fixed number for every season
- Calling zero grazing the same as rotational grazing
- Assuming fire always improves pasture
- Ignoring water-point concentration
What can you explain now?
What can happen when stocking rate exceeds carrying capacity?
Compare with the explanation
Pasture can be overused and soil or vegetation degraded
Excess pressure can prevent recovery and damage land.
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Make it stick
Define stocking rate and carrying capacity and explain one effect of overstocking.
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.