Much of the Western Australia's wheatbelt has experienced a very dry 2018–2019 summer leaving very little stored moisture at present (DPIRD, May seasonal report 2019). Yield potential varies signif
Taking experimental measurements can be labour intensive and time consuming, in addition the methods chosen must be repeatable (regardless of operator) with small degrees of error.
The term 'residual' applies to a number of herbicides that have a long lasting activity in the soil. These herbicides are often applied directly to the soil prior to planting crops, pre-emergent.
