More evidence that we must reform our immigration system so that workers from other countries can legally come into the country and be employed in jobs that Americans simply will not take. This study of the labor needs of the North Carolina Growers Association illustrates the need and the fact that Americans don’t want the very difficult jobs.

That willingness, he finds, is basically nonexistent. Every year from 1998 to 2012, at least 130,000 North Carolinians were unemployed. Of those, the number who asked to be referred to NCGA was never above 268 (and that number was only reached in 2011, when 489,095 North Carolinians were unemployed). The share of unemployed asking for referrals never breached 0.09 percent.

When native unemployed people are referred to NCGA, they’re almost without exception hired; between 1998 and 2011, 97 percent of referred applicants were hired. But they don’t tend to last. In 2011, 245 people were hired out of 268 referred, but only 163 (66.5 percent) of the hired applicants actually showed up to the first day of work. Worse, only seven lasted to the end of the growing season.