GCE A/L Agricultural Science study guide
GCE A/L Agricultural Science · Work through your exam, one topic at a time.
The GCE Advanced Level Agricultural Science examination is a school-leaving and university-entrance qualification taken after two years of upper-secondary study, typically by students in Sri Lanka and in systems that follow a comparable GCE A/L structure. It suits candidates who intend to read agriculture, animal science, food science, or environmental fields at university, and those preparing for technical or extension roles. The GCE A/L Agricultural Science study guide has 8 sections and about 2,365 words.
01Plant Science and Crop Production
The Plant Science and Crop Production domain tests whether you can link crop physiology to agronomic decisions: how photosynthesis, partitioning and phenology translate into yield components you can actually count in a field. C4 crops (maize, sugarcane, sorghum) have a lower CO₂ compensation point, a higher temperature optimum (about 30–35 °C) and better water-use efficiency than C3 crops (rice, wheat, potato).
290 words, about 1 min02Soil Science and Soil Management
Soil Science and Soil Management examines the soil as a physical, chemical and biological system and asks you to convert laboratory values into management decisions - lime, fertilizer, drainage and erosion control. Texture: sand 2.0–0.05 mm, silt 0.05–0.002 mm, clay <0.002 mm; the textural class comes from the three percentages on the triangle.
310 words, about 2 min03Animal Science and Livestock Production
Animal Science tests nutrition, digestion, reproduction and breeding of farm species, and whether you can turn feed and animal records into a management decision. Ruminants (cattle, buffalo, goats) ferment feed in the rumen; microbes produce volatile fatty acids and microbial protein and synthesise B vitamins and vitamin K.
303 words, about 2 min04Agricultural Economics and Farm Management
Agricultural Economics and Farm Management tests whether you can classify costs correctly, compare enterprises on a common basis, and judge a plan by its margin rather than its gross output. Fixed costs (land rent, depreciation, permanent labour, interest on capital) do not change with output in the short run; variable costs (seed, fertilizer, casual labour, fuel, pesticides) do.
310 words, about 2 min05Agricultural Engineering and Farm Machinery
Agricultural Engineering and Farm Machinery tests the quantitative side of mechanisation and irrigation: power, work rate, moisture and water balance, always with units kept consistent. Drawbar power (kW) = draft force (kN) × speed (m/s).
305 words, about 2 min06Agricultural Biology and Genetics
Agricultural Biology and Genetics tests cell division, inheritance and the breeding methods used to create and multiply improved varieties - with the emphasis on predicting progeny ratios rather than memorising names. Mitosis preserves chromosome number in somatic growth; meiosis halves it and creates variation through crossing over and independent assortment.
272 words, about 1 min07Post-harvest Technology and Value Addition
Post-harvest Technology and Value Addition covers what happens to a crop after detachment: respiration, water loss, ripening, storage and processing - and how to keep losses small enough that the value added is real. Respiration rate drives perishability; the Q₁₀ effect means cooling from 30 °C to 10 °C can cut respiration several-fold.
290 words, about 1 min08Sustainable Agriculture and Environmental Management
Sustainable Agriculture and Environmental Management tests whether you can maintain productivity while protecting soil, water and biodiversity - and defend the trade-offs with numbers rather than slogans. Conservation agriculture has three pillars: minimum mechanical soil disturbance, permanent soil cover (residues or cover crops) and diversified rotation.
285 words, about 1 min