For the ICO, there's no need to do this. I think there were projects before that aimed to help the agricultural sector and economy by providing their tokens but it wasn't really effective and useful at all. It was abused and just became a source of wealth collection for the side of the developers.
Yes,this method of raising funds was very discredited by various types of SCAM, which were very common earlier, but if various guarantees of the return of funds, with competent white paper, in a painted financial plan, are provided, then this can be very good.
It gave them an idea that it was this easy to make money out of it by just providing a vision of helping the agricultural sector. Be it with farmers, renewable energy and other stuff that can be connected to that sector.
Still, many are not closing the doors for the opportunity if there's an actual and legit project that will certainly provide a vision and proposal that's really aiming to get with the specific part in agriculture.