Paper at the European Society of Agronomy in 2016:
Progress towards sustainable intensification depends on effective exchange of knowledge and data between industry and academia.
A look at the opportunities for technologies and data to support agriculture and food supply chains
First of all, neither of you are really thinking this through. It would be simple to use electromagnets to cause the sheep to repel each other.
One might find the sheep flying up to impact on high voltage power lines, or becoming magnetized like lodestones and all clumping together which would be most inconvenient for farmers?
What if we injected sheep with graphene nanoparticles and then we could replace sheepdogs with very large electromagnets that we could use to move the sheep around like little fluffy ball bearings
Report by AHDB to understand the calculation of greenhouse gas intenisties.