Maybe you've heard about the migrants lately, or have seen pictures of them in the magazines. But have you thought that many of them are families much like yours and mine, traveling uncomfortably in rattly old jalopies while they go from one crop to another, and living crowded in rickety shacks when they stop for work?There have always been wandering farm laborers because so many crops need but a few workers part of the year and a great many at harvest. A two-thousand-acre peach orchard needs only thirty workers most of the year, and one thousand seven hundred at picking time. Lately, though, there have been more migrants than ever. One reason is that while in the past we used to eat fresh peas, beans, strawberries, and the like only in summer, now we want fresh fruits and vegetables all year round. To supply our wants, great quantities of fresh fruit and vegetables must be raised in the warm climates where they will grow.