There are many things you should be doing with your farm plastics and certainly many more that you shouldn't here are some starters that may just save you some time and money.
Only burn agricultural waste or "plant tissue" if you have prior consent form SEPA. Recycle waste oil, lubricants, scrap metals and plastics and tyres as some of these will become toxic and hazardous over time.
Keep all out agricultural pasture land and housing clean and tidy and free. Remove unsightly rubbish from farming activity, especially used agricultural plastics, scrap and containers.
Store farm waste securely, thus reducing environmental damage and any risk to human health, and excellent way of doing this is with a specially designed agricultural recycling bin. Keep all out agricultural pasture land and housing clean and tidy and free. Remove unsightly rubbish from farming activity, especially used agricultural plastics, scrap and containers.
Monitor water use carefully to minimise leakage or wastage, especially where any seepage is increasing levels of agricultural waste production (for example slurry build up)
Burn waste oil in any appliance once prior authorisation has been granted by SEPA for burning this agricultural waste rules will dictate what you can and cannot do here.
Separate into hazardous and no hazardous waste some materials are toxic and should be handled with extreme care. If ever in doubt (COSHH - control of substances hazardous to health) guidelines should be available on request from your product supplier this is their legal responsibility.If possible sort your agricultural waste into categories for example string, net, fertiliser bags, cardboard and paper, buckets and containers, feed bags, silage waste.
If you are not sure if you should be doing something then ask for guidance there are many places where you can seek guidance. It is always better to ask a stupid question than do something stupid.