Examlex
In examining incomes of free southerners prior to the Civil War, Walton and Rockoff conclude that, compared with northerners, free southerners were ______.
Polyvarietal Cultivation
The agricultural practice of growing multiple varieties of the same crop in a given area to increase genetic diversity and reduce disease risk.
Salt Build-Up
The accumulation of soluble salts in soil, often as a result of irrigation in arid and semi-arid regions.
Agriculturally Unproductive Land
Land that lacks the capability to produce agricultural crops or support livestock, often due to soil infertility, poor climate conditions, or unfavorable topography.
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