Final answer:
Agricultural policy makers in New England are most concerned about soil erosion and degradation as an environmental issue.
Step-by-step explanation:
Agricultural policy makers in New England would be most concerned by soil erosion and degradation as an environmental issue. Soil erosion can lead to decline in soil productivity, loss of soil organic matter, and salinization of soils. These negative effects can greatly impact agricultural production and sustainability. It is important for agricultural policy makers to address and mitigate soil erosion and degradation to ensure the long-term viability of farming in the region.