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Most unplanned fires have a drastic effect on a pasture. Fire changes the plant composition and reduces growth and carrying capacity in the following season.
Frost is difficult to manage. It has a significant economic and emotional impact on the whole community.
Extensive wind erosion of field pea stubble often follows grazing over summer and autumn. Semi-leafless field pea varieties have reduced lodging, improved pod-height and reduced pod-shatter.
Frost occurs on clear nights in early spring when the air temperature drops to 2°C or less.
Waterlogging in some years and some environments in the high rainfall areas of south-west Western Australia can cause significant reductions in plant growth.
Frost risk occurs virtually every year across southern and eastern agricultural regions. Actual occurrence of frost is determined by location and landscape factors as well as climate.