If you want to try field hunting for geese, look for harvested grain or corn. Alfalfa fields planted this year or sometimes last year can be a sleeper that many hunters overlook. Farmers usually seed new alfalfa with a "cover crop" of grain, often barley or oats. Then they bale it instead of combining and feed to livestock. Not sure what the purpose is, perhaps to help keep the ground shaded and moister till alfalfa can get going. Anyway, geese know there's grain underneath the green alfalfa. Rye grass is a rest crop for rotation and I don't think I've ever seen geese land in it. This is a new alfalfa field. Look close and you should see evidence of the cover crop mowed and baled late summer.
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A lot depends on the terrain. I hunt the edges of the fields where there's cover for me and dogs to hide in. Geese shy away from landing too close to the edge so my decoys are out in the field 45-55 yards. I rely on the wind to force geese to approach the deeks coming in overhead. If no wind it's a crap shoot but most will approach from down the field and I'm screwed. Just let them pile up till something circles close enough for a pass shot. If the geese are pressured and no chance for cover on the edges, then you'll probably need a layout blind. Ground pop-up blinds do not work well for pressured geese.
A dozen good shell goose decoys will work fine for Canadas. For snows you'd need at least a hundred decoys. The arrangement of the decoys can be VERY important. I can give you a few tips if you decide to go that route. Use the call sparingly to get their attention then shut up. Too much calling has screwed things up more times than I can count. I use a flute style goose call. A bit trickier to operate but I think they sound better. Maybe stick with conventional style call to start with as they are easier for novice to work. If you get a layout blind perhaps consider a flag but otherwise forget it. Motion decoys for honkers do NOT work. In fact they work against you. Geese don't want anything moving in the set when approaching. A hard lesson learned over many years.
Edit: Looking at that photo it appears my dairy farmer did combine the grain cover crop. It was feed and likely went into silo. He does raise some cash crops, mostly canola (which geese DO NOT like, probably because the stubble is too high and coarse). Incidentally, those geese were not shot in this field. I parked my rig there and hunted sloughs on the other side of the highway. Got them jump shooting. For corn fields, look for chop harvested rather than cob harvested (chop has everything chopped up for silage). Seems just as much feed is left on the field but chop harvesting leaves much shorter stubble and geese seem to like that. Easier to land and get going again. Also, cob harvested fields are dangerous for dogs and can be hard on brake lines.
