interesting that you think that. Why do you surmise no till farming is the culprit? I would think it would be the opposite.The only state I hunt with a 3 bird limit is Va. I've chosen to stick with 2 or 1 depending on the population. Maryland is a 2 bird state. 1 person or 2 in the spring if you didn't tag one in the fall.
2 bird limit I think is fine. For areas that are bird heavy.
I've said it before. Areas where farming has gone to no till the birds are way down in population. Across the country no till has be widely accepted. No where in these areas have I seen flocks one to 4 birds at the most. In the non farming areas. Horse country, woodlands and mountains birds are striving.