A couple of things to think about

1) you will have to do some reach into various types of non-dilutive funding. Grants, per say, should be part of the solution, but not the only solution. I would be looking into start-up competitions and corporate sponsorship

2) I would start researching into grant funding through various governments that are willing to fund in your area

3) I would also start looking at various agricultural companies (equipment or chemical), an that are well known in the industry (Ag-Chem Equipment, Alexander & Baldwin, Alico (company), Allen Family Foods, American Tractor Corporation, etc.) to name a few. These companies may having funding in various formats.