Cambridge O Level Environmental Management: Land (5014, 2027-2029)

Syllabus edition note. This resource follows the Cambridge O Level Environmental Management 5014 syllabus for exams in 2027, 2028 and 2029 (version 1), first examined in the June 2027 series (and also available in the November series in Mauritius only). If you sit 5014 in November 2026 in Mauritius, you sit the 2025-2026 syllabus (version 2), which differs: it has nine topics instead of seven, Paper 1 is “Theory” (Section A 20 marks, Section B 60 marks) and Paper 2 is “Management in context”, and it lists recommended case studies for each topic. For this topic, the 2025-2026 syllabus has Topic 3 Agriculture and the environment in eight sub-topics (3.1-3.8), compares sandy and clay soils rather than explaining loam, includes selective breeding, and has a separate sub-topic on sustainable agriculture. Use the 2025-2026 Agriculture and the Environment guide if you sit in November 2026.

This guide covers Topic 2 Land in the 2027-2029 edition of Cambridge O Level Environmental Management (5014). It has three sub-topics: 2.1 Soils and crop growth, 2.2 Food production and crop yield and 2.3 Soil erosion. It follows Topic 1 Natural resources (see the Rocks, Ores and Minerals and Energy Resources guides).

Where this fits in 5014

Land replaces the 2025-2026 topic Agriculture and the environment. It starts with soil and the conditions crops need, moves to how farmers increase yields and what unsustainable farming does to the environment and people, and ends with soil erosion and how to reduce it. Several ideas return later: eutrophication in 3.2 Water pollution, deforestation in 5.2 Forest ecosystems, and drought-resistant crops as a climate change adaptation in 4.2.

Syllabus coverage

CAMBRIDGE O LEVEL ENVIRONMENTAL MANAGEMENT (5014), 2027-2029 — TOPIC 2 LAND

• 2.1 Soils and crop growth
  • 2.1.1 Describe the composition of soils: mineral particles (sand, silt and clay), organic content, gases and water. Knowledge of percentage composition of soils is not required.
  • 2.1.2 Describe how the composition of soils is important for crop growth.
  • 2.1.3 Explain why loam soils are a good medium for crop growth.
  • 2.1.4 Define weather.
  • 2.1.5 State that some areas of the world experience wet seasons and dry seasons that impact crop growth.
  • 2.1.6 Describe and interpret conditions suitable for the optimum rate of photosynthesis and crop growth.
• 2.2 Food production and crop yield
  • 2.2.1 Describe the different types of agriculture.
  • 2.2.2 Define sustainable food production.
  • 2.2.3 Describe and explain the twelve strategies to increase food production and crop yield listed.
  • 2.2.4 Describe and explain the impacts of unsustainable agricultural practices on the environment and people.
• 2.3 Soil erosion
  • 2.3.1 Describe the causes of soil erosion.
  • 2.3.2 Describe the impacts of soil erosion.
  • 2.3.3 Describe and explain strategies to reduce soil erosion.

How to approach it

Keep three chains in mind. Soil composition explains crop growth (2.1). Strategies to raise yield (2.2.3) each have an unsustainable version whose impacts are listed in 2.2.4: fertilisers against overuse of fertilisers, pesticides against overuse of pesticides, irrigation against mismanaged irrigation. And soil erosion (2.3) links causes, impacts and strategies: for each strategy, be able to say which cause it tackles. The syllabus names no case studies, so use farming examples from your own region.

Official syllabus

Cambridge O Level Environmental Management (5014) syllabus for 2027, 2028 and 2029, section 3 Subject content, pp.15-18 — cambridgeinternational.org.

2.1 Soils and crop growth

Composition (2.1.1). Soil is made of:

• mineral particles: sand (largest), silt and clay (smallest);
• organic content: living organisms (plants, animals, fungi and bacteria) and organic matter from decomposition;
• gases, in the pore spaces between particles;
• water, also held in the pore spaces and around particles.

Why composition matters for crops (2.1.2). The syllabus lists:

Feature	Why it matters
Mineral particles (sand, silt and clay)	Sandy soils drain fast and hold few nutrients; clay soils hold water and nutrients but drain slowly and are heavy to work
Nutrient content: organic content and inorganic ions	Plants need nitrogen as nitrate ions (NO₃⁻), phosphorus as phosphate ions (PO₄³⁻) and potassium as potassium ions (K⁺)
pH: acidic, neutral and alkaline	Most crops grow best in soil that is close to neutral; very acidic or alkaline soils limit growth
Pore spaces	Hold the air and water that roots need
Gas content	Roots need oxygen for respiration
Water content and drainage	Roots need water, but waterlogged soil lacks oxygen
Ease of cultivation	Light, crumbly soils are easier to plough and plant

Loam (2.1.3). A loam soil is a good medium for crop growth because it:

• has an ideal combination of mineral particles and pore spaces;
• retains moisture;
• contains organic content and inorganic ions;
• allows excess water to drain;
• is easy to cultivate.

Weather and seasons (2.1.4-2.1.5). The syllabus defines weather as “the day-to-day conditions of the atmosphere in a location” (compare climate in 4.1.2, which is based on the weather over many years). Some areas of the world have wet seasons and dry seasons, and these affect when crops can be grown.

Conditions for photosynthesis and crop growth (2.1.6). The syllabus lists the length of the growing season, optimum weather conditions and daylight hours. Longer growing seasons, suitable temperatures and rainfall, and more hours of daylight allow more photosynthesis and higher yields. “Interpret” means you may be given a graph or table, for example of temperature and rainfall by month, and asked which months suit a crop.

2.2 Food production and crop yield

Types of agriculture (2.2.1).

Type	Meaning
Arable, pastoral and mixed	Growing crops; rearing animals; both on the same farm
Subsistence and commercial	Producing food mainly for the farmer’s own family; producing food for sale
Intensive	High inputs of labour, capital, fertiliser or machinery to get high yields from a given area
Monoculture	Growing a single crop over a large area

Sustainable food production (2.2.2) is defined as “the production of sufficient food for the present generation using methods that ensure future generations can grow food from the same land”.

Strategies to increase food production and crop yield (2.2.3). The syllabus lists twelve:

Strategy	How it increases yield
Mixed cropping, intercropping and crop rotation	Growing different crops together or in turn uses soil nutrients more evenly and breaks pest and disease cycles
Improved methods of irrigation: trickle/drip irrigation, rainwater harvesting and automated watering systems	Supplies water where it is needed with less waste
Mechanisation	Machines farm larger areas more quickly
Genetically modified organisms	The syllabus defines this as “changing the genetic material of an organism by removing, changing or inserting individual genes to give favourable characteristics”, such as pest resistance
Controlled environments: greenhouses, hydroponics and aeroponics	Temperature, water and nutrients are controlled; hydroponics grows plants in nutrient solution and aeroponics in a nutrient mist, without soil
Managed grazing: livestock rotation	Moving animals between fields lets pasture recover
Urban farming	Growing food in towns and cities, close to consumers
Agroforestry	Trees are grown with crops or livestock, protecting soil and adding products
Inorganic NPK fertilisers	Replace nitrogen, phosphorus and potassium taken up by crops
Organic fertilisers: crop residue, manure and mulch	Add nutrients and organic matter, improving soil structure
Chemical control of pests (pesticides): insecticide, herbicide and fungicide	Kill insects, weeds and fungi that reduce yields
Biological control of pests	A natural predator or parasite of the pest is introduced

Impacts of unsustainable agricultural practices (2.2.4). The syllabus lists nine:

• Overproduction of food: food wastage.
• Food shortages: cash crops (coffee, cotton, soya beans and palm oil) and biofuel crops replacing food crops.
• Mismanagement of irrigation: soil erosion, salinisation and water logging.
• Overuse of pesticides: pesticide resistance, pest resurgence and impacts on pollinators.
• Overuse of fertilisers: leaching into water sources, nutrient enrichment and eutrophication.
• Exhaustion of nutrients in soils: organic content and inorganic ions.
• Removal of natural vegetation: deforestation, overcultivation and overgrazing.
• Monoculture and intensification: soil and water pollution, loss of biodiversity.
• Soil erosion: loss of topsoil and nutrients.

“Describe and explain” means each impact needs its mechanism. For example, fertiliser washed out of the soil (leaching) enriches rivers and lakes with nutrients; algae grow rapidly; when they die, bacteria decomposing them use up the oxygen in the water, and fish die. That sequence is eutrophication.

2.3 Soil erosion

Causes (2.3.1): unsustainable agricultural practices; deforestation; farming on steep slopes; bare soil; wind and water erosion.

Impacts (2.3.2): silting of rivers; desertification; mass movement (landslides, rockslides and mudslides); loss of habitats and biodiversity; reduction in crop yield; malnutrition and famine; displacement of people.

Strategies (2.3.3). The syllabus gives each strategy with the way it works:

Strategy	How it works (syllabus wording)
Terracing	Reduces movement of soil and surface run-off
Contour ploughing	Reduces surface run-off
Bunds	Reduces surface run-off, reduces wind speed and wind erosion
Wind breaks	Protects crops, reduces wind speed and wind erosion
Maintaining vegetation cover	Roots bind the soil, vegetation reduces surface run-off and absorbs water
Addition of organic matter	Improves soil structure

Worked example

A farmer’s maize yield falls from 5.0 tonnes per hectare to 3.5 tonnes per hectare over ten years on a steep, cleared slope. Calculate the percentage fall, and suggest one cause and one strategy from the syllabus.

fall            = 5.0 - 3.5 = 1.5 t/ha
percentage fall = 1.5 / 5.0 x 100 = 30%

Cause: farming on steep slopes with bare soil lets rain wash topsoil and nutrients away (2.3.1). Strategy: terracing reduces the movement of soil and surface run-off (2.3.3).

Common mistakes

• Comparing sandy and clay soils when the question asks about loam: this edition asks why loam is a good medium for crop growth.
• Confusing weather (day-to-day) with climate (over many years).
• Naming a yield strategy without saying how it raises yield, or naming an impact without its mechanism.
• Including selective breeding as a yield strategy: the 2027-2029 syllabus removed it.
• Mixing up the lists: crop rotation and intercropping are yield strategies in 2.2.3, not soil erosion strategies in 2.3.3.

Quick revision checklist

• Describe soil composition and explain how each feature in 2.1.2 affects crop growth, with the three inorganic ions and their formulae.
• Explain why loam is a good medium for crop growth.
• Define weather and sustainable food production.
• Describe the four groups of agriculture types in 2.2.1.
• Describe and explain all twelve yield strategies and all nine impacts of unsustainable practices.
• Link each soil erosion cause to its impacts and to a strategy that reduces it.

What changed from the 2025-2026 syllabus

• Structure. Topic 3 Agriculture and the environment (3.1-3.8) becomes Topic 2 Land (2.1-2.3). The old 3.1 Soil composition and 3.2 Soils for plant growth become 2.1; 3.3-3.5 become 2.2; 3.6 and 3.7 become 2.3; the old 3.8 Sustainable agriculture is no longer a separate sub-topic. Most of its strategies (organic fertiliser, managed grazing, crop rotation, trickle drip irrigation and rainwater harvesting) are now yield strategies in 2.2.3; pest-resistant and drought-resistant crop varieties are no longer listed in this topic.
• Soils and crops. Loam replaces the comparison of sandy and clay soils: mineral particles, pore spaces, gas and water content, drainage and ease of cultivation are now factors in crop growth for any soil, alongside nutrients and pH, which the 2025-2026 syllabus already had. New outcomes: the definition of weather, wet and dry seasons, and conditions for photosynthesis and crop growth.
• Food production. Intensive agriculture and monoculture are added to the types, and there is a new definition of sustainable food production. Selective breeding is removed. New to the yield strategies are mixed cropping and intercropping (in 2025-2026 they were soil erosion strategies), automated watering systems, aeroponics, urban farming, agroforestry and mulch.
• Impacts. Food shortages now include biofuel crops; pesticide overuse adds resistance, resurgence and pollinators; fertiliser overuse adds eutrophication; monoculture and intensification are new.
• Soil erosion. Causes add deforestation, farming on steep slopes and bare soil; impacts add mass movement and reduced crop yield; the strategies now carry the syllabus’s own explanation of how each works.
• Case study. The 2025-2026 syllabus recommended a case study of agriculture with severe environmental consequences; the 2027-2029 syllabus has removed its recommended case studies.