While the culture of many crops (especially "dry" crops) has become entirely mechanized, others, such as fruits and vegetables, still require manual labor, at least for harvest, and some, such as tobacco, still need manual labor for its culture. Much of the work was once provided by family members or boarding students, but they are less available now, and farms are larger. Now, migratory workers provide much of the hand labor required in agriculture in the US and other countries. Labor contractors arrange with farmers to provide the necessary help at the seasonal time, often with foreign nationals whose employment opportunities are more limited in their home areas.