# Leaving Cert Ag Science: Sustainability & Environment questions > Every Leaving Cert Ag Science exam question on Sustainability & Environment, grouped by level and year. Questions come from the official State Examinations Commission papers; every PDF link opens the original on examinations.ie. Canonical: https://examai.ie/past-papers/leaving-cert/ag-science/topic/sustainability-environment Biodiversity and habitats, nutrient and carbon cycling, emissions and water quality, and organic and low-input systems. 55 past Ag Science questions on this topic, spanning 2015 to 2026, grouped by year. Each links to its exact page in the official paper and marking scheme. ## Higher Level ### 2026 - Q1 (10 marks): farm machinery, soil compaction - [Paper](https://www.examinations.ie/archive/exampapers/2026/LC024ALP000EV.pdf#page=3) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2026/LC024ALP000EV.pdf#page=12) - Q2 (10 marks): photosynthesis, crop production - [Paper](https://www.examinations.ie/archive/exampapers/2026/LC024ALP000EV.pdf#page=4) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2026/LC024ALP000EV.pdf#page=12) - Q7 (10 marks): soil biology, soil health - [Paper](https://www.examinations.ie/archive/exampapers/2026/LC024ALP000EV.pdf#page=12) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2026/LC024ALP000EV.pdf#page=16) - Q14 (50 marks): clover, reseeding, microbiology - [Paper](https://www.examinations.ie/archive/exampapers/2026/LC024ALP000EV.pdf#page=24) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2026/LC024ALP000EV.pdf#page=23) ### 2025 - Q3 (10 marks): farm technology, animal welfare - [Paper](https://www.examinations.ie/archive/exampapers/2025/LC024ALP000EV.pdf#page=6) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2025/LC024ALP000EV.pdf#page=13) - Q7 (10 marks): soil microbiome, soil health, catch crops - [Paper](https://www.examinations.ie/archive/exampapers/2025/LC024ALP000EV.pdf#page=12) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2025/LC024ALP000EV.pdf#page=15) - Q8 (10 marks): soil fertility, crop production - [Paper](https://www.examinations.ie/archive/exampapers/2025/LC024ALP000EV.pdf#page=13) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2025/LC024ALP000EV.pdf#page=16) - Q12 (10 marks): breeding, photosynthesis, transpiration - [Paper](https://www.examinations.ie/archive/exampapers/2025/LC024ALP000EV.pdf#page=18) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2025/LC024ALP000EV.pdf#page=17) ### 2024 - Q2 (10 marks): animal breeds, cattle breeding - [Paper](https://www.examinations.ie/archive/exampapers/2024/LC024ALP000EV.pdf#page=4) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2024/LC024ALP000EV.pdf#page=12) - Q3 (10 marks): grassland management, grazing systems - [Paper](https://www.examinations.ie/archive/exampapers/2024/LC024ALP000EV.pdf#page=6) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2024/LC024ALP000EV.pdf#page=13) - Q7 (10 marks): agroforestry, forestry - [Paper](https://www.examinations.ie/archive/exampapers/2024/LC024ALP000EV.pdf#page=12) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2024/LC024ALP000EV.pdf#page=16) - Q10 (10 marks): multi-species swards, soil biology - [Paper](https://www.examinations.ie/archive/exampapers/2024/LC024ALP000EV.pdf#page=15) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2024/LC024ALP000EV.pdf#page=17) - Q12 (10 marks) - [Paper](https://www.examinations.ie/archive/exampapers/2024/LC024ALP000EV.pdf#page=17) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2024/LC024ALP000EV.pdf#page=17) - Q13 (50 marks): botanical composition, peat soils - [Paper](https://www.examinations.ie/archive/exampapers/2024/LC024ALP000EV.pdf#page=21) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2024/LC024ALP000EV.pdf#page=18) - Q17 (50 marks): rhizosphere, soil organic matter - [Paper](https://www.examinations.ie/archive/exampapers/2024/LC024ALP000EV.pdf#page=34) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2024/LC024ALP000EV.pdf#page=23) ### 2023 - Q5 (10 marks): soil testing, soil nutrients - [Paper](https://www.examinations.ie/archive/exampapers/2023/LC024ALP000EV.pdf#page=8) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2023/LC024ALP000EV.pdf#page=14) - Q7 (10 marks): dairy, reproduction - [Paper](https://www.examinations.ie/archive/exampapers/2023/LC024ALP000EV.pdf#page=10) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2023/LC024ALP000EV.pdf#page=15) - Q8 (10 marks): scientific investigation, fertilisers - [Paper](https://www.examinations.ie/archive/exampapers/2023/LC024ALP000EV.pdf#page=11) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2023/LC024ALP000EV.pdf#page=17) - Q16 (50 marks) - [Paper](https://www.examinations.ie/archive/exampapers/2023/LC024ALP000EV.pdf#page=30) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2023/LC024ALP000EV.pdf#page=24) ### 2022 - Q6 (10 marks) - [Paper](https://www.examinations.ie/archive/exampapers/2022/LC024ALP000EV.pdf#page=9) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2022/LC024ALP000EV.pdf#page=18) - Q8 (10 marks): pesticides, antibiotics - [Paper](https://www.examinations.ie/archive/exampapers/2022/LC024ALP000EV.pdf#page=11) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2022/LC024ALP000EV.pdf#page=19) - Q9 (10 marks): ruminant digestion, calf rearing - [Paper](https://www.examinations.ie/archive/exampapers/2022/LC024ALP000EV.pdf#page=12) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2022/LC024ALP000EV.pdf#page=20) - Q18 (50 marks): food safety, weed control, farm economics - [Paper](https://www.examinations.ie/archive/exampapers/2022/LC024ALP000EV.pdf#page=37) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2022/LC024ALP000EV.pdf#page=31) ### 2021 - Q3 (10 marks): farm safety, farm machinery - [Paper](https://www.examinations.ie/archive/exampapers/2021/LC024ALP000EV.pdf#page=6) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2021/LC024ALP000EV.pdf#page=12) - Q4 (10 marks): farmyard layout - [Paper](https://www.examinations.ie/archive/exampapers/2021/LC024ALP000EV.pdf#page=8) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2021/LC024ALP000EV.pdf#page=13) - Q6 (10 marks): respiration, soil structure, soil organic matter - [Paper](https://www.examinations.ie/archive/exampapers/2021/LC024ALP000EV.pdf#page=10) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2021/LC024ALP000EV.pdf#page=15) - Q7 (10 marks) - [Paper](https://www.examinations.ie/archive/exampapers/2021/LC024ALP000EV.pdf#page=12) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2021/LC024ALP000EV.pdf#page=16) - Q13 (50 marks): multi-species swards, grazing systems, botanical composition - [Paper](https://www.examinations.ie/archive/exampapers/2021/LC024ALP000EV.pdf#page=22) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2021/LC024ALP000EV.pdf#page=20) - Q15 (50 marks): experimental design, grass dry matter, data analysis - [Paper](https://www.examinations.ie/archive/exampapers/2021/LC024ALP000EV.pdf#page=31) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2021/LC024ALP000EV.pdf#page=28) - Q16 (50 marks): milk pricing, milk quality, farm technology - [Paper](https://www.examinations.ie/archive/exampapers/2021/LC024ALP000EV.pdf#page=35) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2021/LC024ALP000EV.pdf#page=30) - Q18 (50 marks): crop productivity, lactation, heat detection - [Paper](https://www.examinations.ie/archive/exampapers/2021/LC024ALP000EV.pdf#page=44) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2021/LC024ALP000EV.pdf#page=35) ### 2020 - Q8 (48 marks): antibiotic resistance, digestion - [Paper](https://www.examinations.ie/archive/exampapers/2020/LC024ALP000EV.pdf#page=7) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2020/LC024ALP000EV.pdf#page=11) ### 2019 - Q6 (48 marks): soil compaction, clover, grassland management - [Paper](https://www.examinations.ie/archive/exampapers/2019/LC024ALP000EV.pdf#page=6) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2019/LC024ALP000EV.pdf#page=11) ### 2018 - Q1 (60 marks): livestock units, plant structure, animal physiology - [Paper](https://www.examinations.ie/archive/exampapers/2018/LC024ALP000EV.pdf#page=2) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2018/LC024ALP000EV.pdf#page=5) - Q9 (48 marks): slurry management, forestry, pig production - [Paper](https://www.examinations.ie/archive/exampapers/2018/LC024ALP000EV.pdf#page=7) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2018/LC024ALP000EV.pdf#page=14) ### 2017 - Q8 (48 marks): insects, pests, terminology - [Paper](https://www.examinations.ie/archive/exampapers/2017/LC024ALP000EV.pdf#page=6) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2017/LC024ALP000EV.pdf#page=15) ### 2015 - Q8 (48 marks): grassland management, livestock units, definitions - [Paper](https://www.examinations.ie/archive/exampapers/2015/LC024ALP000EV.pdf#page=5) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2015/LC024ALP000EV.pdf#page=11) ## Ordinary Level ### 2026 - Q2 (10 marks): pollination, crop yield - [Paper](https://www.examinations.ie/archive/exampapers/2026/LC024GLP000EV.pdf#page=4) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2026/LC024GLP000EV.pdf#page=12) - Q6 (10 marks): true or false - [Paper](https://www.examinations.ie/archive/exampapers/2026/LC024GLP000EV.pdf#page=8) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2026/LC024GLP000EV.pdf#page=14) - Q17 (50 marks): fertilisers, crop establishment, experimental design - [Paper](https://www.examinations.ie/archive/exampapers/2026/LC024GLP000EV.pdf#page=30) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2026/LC024GLP000EV.pdf#page=22) ### 2025 - Q6 (10 marks): pollination - [Paper](https://www.examinations.ie/archive/exampapers/2025/LC024GLP000EV.pdf#page=8) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2025/LC024GLP000EV.pdf#page=13) ### 2024 - Q9 (10 marks): plant nutrition - [Paper](https://www.examinations.ie/archive/exampapers/2024/LC024GLP000EV.pdf#page=12) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2024/LC024GLP000EV.pdf#page=15) ### 2023 - Q4 (10 marks): crop rotation, grassland management - [Paper](https://www.examinations.ie/archive/exampapers/2023/LC024GLP000EV.pdf#page=6) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2023/LC024GLP000EV.pdf#page=13) - Q14 (50 marks): crop production, farm safety - [Paper](https://www.examinations.ie/archive/exampapers/2023/LC024GLP000EV.pdf#page=23) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2023/LC024GLP000EV.pdf#page=18) ### 2022 - Q4 (10 marks): animal reproduction - [Paper](https://www.examinations.ie/archive/exampapers/2022/LC024GLP000EV.pdf#page=7) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2022/LC024GLP000EV.pdf#page=13) - Q8 (10 marks): microbiology, laboratory investigation - [Paper](https://www.examinations.ie/archive/exampapers/2022/LC024GLP000EV.pdf#page=11) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2022/LC024GLP000EV.pdf#page=16) - Q17 (50 marks): agricultural technology - [Paper](https://www.examinations.ie/archive/exampapers/2022/LC024GLP000EV.pdf#page=32) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2022/LC024GLP000EV.pdf#page=25) ### 2021 - Q4 (10 marks): soil profile, soil types - [Paper](https://www.examinations.ie/archive/exampapers/2021/LC024GLP000EV.pdf#page=7) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2021/LC024GLP000EV.pdf#page=12) - Q9 (10 marks) - [Paper](https://www.examinations.ie/archive/exampapers/2021/LC024GLP000EV.pdf#page=12) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2021/LC024GLP000EV.pdf#page=14) - Q16 (50 marks): soil types, soil management, soil ph - [Paper](https://www.examinations.ie/archive/exampapers/2021/LC024GLP000EV.pdf#page=27) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2021/LC024GLP000EV.pdf#page=20) ### 2020 - Q5 (20 marks) - [Paper](https://www.examinations.ie/archive/exampapers/2020/LC024GLP000EV.pdf#page=5) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2020/LC024GLP000EV.pdf#page=5) ### 2019 - Q7 (20 marks): clover, grassland - [Paper](https://www.examinations.ie/archive/exampapers/2019/LC024GLP000EV.pdf#page=7) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2019/LC024GLP000EV.pdf#page=7) ### 2018 - Q8 (60 marks): fertilisers, slurry, soil water - [Paper](https://www.examinations.ie/archive/exampapers/2018/LC024GLP000EV.pdf#page=8) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2018/LC024GLP000EV.pdf#page=8) ### 2017 - Q13 (60 marks): dairy, barley cultivation, weanlings - [Paper](https://www.examinations.ie/archive/exampapers/2017/LC024GLP000EV.pdf#page=13) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2017/LC024GLP000EV.pdf#page=13) ### 2016 - Q11 (60 marks): soil types, earthworms, fertilisers - [Paper](https://www.examinations.ie/archive/exampapers/2016/LC024GLP000EV.pdf#page=11) · [Marking scheme](https://www.examinations.ie/archive/markingschemes/2016/LC024GLP000EV.pdf#page=12) ## Related - [Scientific Practices & Investigation](https://examai.ie/past-papers/leaving-cert/ag-science/topic/scientific-practices-investigation) - [Soils](https://examai.ie/past-papers/leaving-cert/ag-science/topic/soils) - [Crops & Plant Science](https://examai.ie/past-papers/leaving-cert/ag-science/topic/crops-plant-science) - [Grassland & Forage](https://examai.ie/past-papers/leaving-cert/ag-science/topic/grassland-forage) - [Animal Production & Husbandry](https://examai.ie/past-papers/leaving-cert/ag-science/topic/animal-production-husbandry) - [Animal Health & Disease](https://examai.ie/past-papers/leaving-cert/ag-science/topic/animal-health-disease) - [Genetics & Breeding](https://examai.ie/past-papers/leaving-cert/ag-science/topic/genetics-breeding) - [Farm Management, Machinery & Safety](https://examai.ie/past-papers/leaving-cert/ag-science/topic/farm-management-machinery-safety) - [All Ag Science past papers](https://examai.ie/past-papers/leaving-cert/ag-science)