I had lunch with a friend who used to work for the UK ministry of agriculture, so she visited a lot of farms. She talked about the problem of chemicals. She said that on some farms fields will get sprayed twice if there isn't good communication between the owners/empoyees.
She said people worry about too many chemicals, but there can alsobe a problem with too little. Dairy farmers have to clean out the pipes with expensive chemicals, and some farmers won't use the recommended amount because of the cost - this can lead to unwanted bacteria being found in milk.
Makes you think ..
(By the way our website http://www.healthandgoodness.com is currently down because of the revamp - next week it will be up again and be even bigger and better)