In a geospatial studies on impact of climate change on crops one need detrend the climate parameters and technology.
I think that it is very difficult to completely separate the impact of climate change from the technology. Everything that farmers are doing, from the use of cultivars, knowledge of sowing dates, availability of fertiliser etc., could be considered a technology.
The effect of climate change on typical current farmer practice is referred to as climate change impact. If technologies or management factors are used to improve the performance of the system under climate change, these can be referred to as adaptation options.
The difference between the current system and the current system under climate change is thus the climate change impact. The difference between the current system under climate change and the adaptation scenarios are the effects of the technologies (climate change adaptation options).
It is difficult to do. It is not necessary that all adaptation strategies are related to climate change impact. New technology also helping them to change their practices. For example, HYV, Power Tiller and other technologies which are increasingly adopted by the farmers but not surely for climate change impacts alone.
this is not an answer to the question but rather adding another dimension to the problem. In the harsh environments such as those of central Africa dominated by subsistent agricultural systems the impact of climate change is at its maximum with minimum adoption of technology and crop management systems. In these areas over exploitation of the land beyond it carrying capacity in term of crops or animal grazing is a necessity for survival of such communities. This practice maximizes the impact of climate change.
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