I am sorry Alexa I think you are talking rubbish. Most crops; grains, root crops, industrial crops like rape and maize are cropped by big machines which are owned by the big agricultural contracting companies who use this equipment intensively and extensively. Vegetable crops like lettuces, brassica and leeks can be planted by machine and again contractors often do this work as well using specialised equipment , which, because it is used intensively and extensively is economically a sound investment. There are already schemes in place to provide farmers with seasonal workers and as these are UK schemes, not EU they are unlikely to be affected by Brexit, so workers will still be becoming over
Then you say I don't want to eat US chlorinated chicken or hormone and antobiotic-laden beef and am increasing my cooking skills for vegetarian foods. What has livestock farming got to do with farmers cropping vegetables and soft fruit? Then you say you are cooking more vegetarian food after talking about shortages of fruit and veg
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The UK is the second largest producer of poultry products in Europe only about a 25 % of demand is met by imports. No one is going to force you to buy chlorine washed chicken. You are only likely to find it in cheap chicken take aways and cheap ready meals. If you buy your chicken fresh from a reputable supplier, supermarket, farm shop or butcher, there will not be a problem.
Lastly remember that all farmers are pessimists. They all expect everything to fail. They are hard-wired to see problems where none exist. Remember the poem?
The Farmer will never be happy again;
He carries his heart in his boots;
For either the rain is destroying his grain
Or the drought is destroying his roots