  Cosmic Ray Neutron Sensing (CRNS) is a powerful technique that allows
non-invasive monitoring of soil moisture on length scales well matched for
agricultural applications. One factor limiting the use of the technique within
industrial agriculture settings is the high initial cost of Helium-3 or BF3
tubes typically used for ground level neutron monitoring. This paper discusses
the use of Geant4 to optimise an alternative scintillator based neutron
detector that may be applicable for challenges where cost is a higher driving
factor than temporal resolution.
