Quick questions on Climate challenge and agricultural adaptation explained: HSC Agriculture Elective

The impacts run through the whole farm system. In cropping, lower and less reliable growing-season rainfall reduces yields and shifts the viable cropping zone, while heat at flowering and grain fill cuts grain set and quality. In livestock, heat stress reduces feed intake, growth, conception and milk production, and drought collapses pasture, forcing destocking, expensive supplementary feeding, and welfare risk. More extreme events bring flood, bushfire and erosion.

Adaptation manages the impacts producers cannot avoid:

Mitigation reduces agriculture's own greenhouse emissions, which in Australia are dominated by methane from ruminant livestock and nitrous oxide from soils and fertiliser. Strategies include improving feed efficiency and animal productivity so emissions per kilogram of product fall, supplementing diets with methane-reducing additives (such as the seaweed Asparagopsis being commercialised in Australia), better fertiliser management to cut nitrous oxide, building soil carbon through pasture and stubble management, and replacing diesel and grid power with on-farm solar and bioenergy. Many producers pursue carbon farming, generating Australian Carbon Credit Units from soil-carbon or revegetation projects as a new income stream.