exam prep Flashcards
what are the main greenhouse gasses?
- carbon dioxide
- nitrous oxide
- methane
processes by which agriculture or horticulture contribute to net emissions of carbon dioxide
- use of fossil fuels in machinery
- accelerated soil organic matter breakdown
- clearing vegetation
processes by which agriculture or horticulture contribute to net emissions of nitrous oxide
- use of nitrogen containing materials ( fertilisers manure)
- growing nitrogen fixing plants such as legumes
- animal urine deposits
- wet soils
processes by which agriculture or horticulture contributes to net emission of methane
- ruminant animal digestion
- wetlands or swamps
- livestock enteric fermentation
- livestock waste management
- rice cultivation
- agriculture waste burning
management strategies to reduce net emission of carbon dioxide
- reduce the use of fossil fuels in machinery
- plant trees
- increase soil organic matter or soil organic carbon
management strategies to reduce net emissions of nitrous oxide
- reduce the use of materials containing nitrogen ( fertilisers, manure ) by matching application to plant requirements.
- avoid available nitrogen in wet soils
management strategies to reduce net emissions of methane
- manipulate feed of ruminant animals to reduce methane productions
- reduce the number of ruminant animals
- avoid agriculture waste burning
- rice cultivation ~ avoid paddy production on carbon rich soils.
ways that weeds can spread
- wind
- seeds fall onto ground
- came in stock feed
- carried on or in water
- brought in and spread by machinery, people, and animals
methods to maximise percentage of livestock
- nutrition
- water and feed
- shelter
- pest control
- disease control
- weed control
- animal hygiene
- minimise stress
- temperature control
maximise germination of seeds
- correct storage
- correct handling
- fresh seeds
- clean water
- optimum temperature
- adequate aeration
minimise the turbidity of water in a dam that is used for stock drinking water
- good filtration
- avoid bank erosion
- reduce algal growth
- reduce infestation of fish
modifications to potting mix or soil that may be implemented to get the best growing conditions
- water drainage
- correct fertility levels
- alter pH
- add organic matter
- use green manure
management in a hothouse for optimum for an optimum environment
- temperature control
- moisture control
- weed control
- disease control
- humidity control
- drainage
- shade
- shelter
- pest control
- water quality
management to ensure that intensively managed animals have the optimum environment for production
- light control
- adequate nutrition
- shading
- temperature control
- feed pad
- disease control
- pest control
- adequate space
- calm environment
what are some methods of topography
- laser levelling
- contouring
- terracing
- raised beds
