From projected financial results of the developed model, it was concluded that differing designs were preferred for different farm circumstances.
The 'user-friendly' model interface allows the input of key assumptions and farm specific parameters enabling model simulations to be tailored to individual farm circumstances.
The results of this study show the need to consider farm circumstances and the variation in ECF risk, both spatially and temporally when designing control strategies for ECF.
Insights were disclosed by combining microbiological analyses with the diagnosis of the risk level at farm circumstances, the status of implemented control measures and assurance activities and the system outputs at three typical Brazilian farms.
However, under farm circumstances restricted feeding can also predispose to diarrhoea.
Today, this privilege, which could either be viewed as an exemption from infringement or as an exception to the variety developer's rights, has become formally conditional to elements related to national circumstances, farm size and the necessity to use the seed on the same farm, and has also been surrounded by licensing obligations (Dutfield [2008]).
This is dependent on whether the intervention causes a selection pressure on the pathogen, and whether the selection is fast enough to occur before the (selected) agent reaches new susceptibles (other farms); in those circumstances a control measure could have less effect than previously estimated.
Farm families in those circumstances consume a substantial part of what they produce.
The Frosts then moved to the thirty-acre farm in Derry, under circumstances that Frost found aggravating.
"Farming is a different circumstance, once you lose someone off the land and the property lies dormant, it becomes unproductive," Langhorne said.
Its economic impact – as witnessed in the UK in 2001 (Thompson et al., 2002) - is considered sufficient to justify stringent control measures including the implementation of a stamping-out policy with culling of animals on infected farms and, in certain circumstances, where infection is suspected rather than confirmed.
