Just last month, the US House had a meeting to address the issue of child safety on farms:
(Washington, DC) – The US House Small Business Subcommittee on Agriculture, Energy and Trade is holding a hearing on February 2, 2012, on proposed rules to prevent child farmworkers from taking on the most dangerous tasks. The new rules are intended to make paid farm work safer for the hundreds of thousands of children in the United States who labor in agriculture. They would not apply to children working on their parents’ farms.
Read more of the article: Human Rights Watch