I agree with you Vprot on the aspect that quality of data depend on the knowledge. This point is the key to the sucess of ICT and agriculture. In Kenya so many people have developed beautiful agricuture mobile apps but the implementation does not exist, why there was no knowledge behind it for this person to first understand the concept behind agriculture  and nutrition at small scale farmer level. Which include culture, traditional methods of feeding and farming, level of education and the understanding concept of the farmer. If all this can be taken seriously the mobile apps can start making sense and the maps will speak sense too and easily understood for decision making.