public TaskDataDocument()
{
FieldBoundaries = new List<FieldBoundary>();
GuidanceGroups = new Dictionary<string, GuidanceGroupDescriptor>();
CropVarieties = new Dictionary<string, CropVariety>();
Ingredients = new List<Ingredient>();
CropZones = new Dictionary<string, CropZone>();
UnitsByItemId = new Dictionary<string, IsoUnit>();
GuidanceAllocations = new List<GuidanceAllocation>();
Contacts = new List<ContactInfo>();
Machines = new Dictionary<string, DeviceElement>();
}