PSA - Please mark observations cultivated while ID'ing

I am afraid I find this faintly ridiculous. Most of the countryside in the UK is managed. Miles of roadside and fieldside hedges are planted. Many of the rivers in Essex have willow planted along them. Sometimes these occured decades and perhaps centuries ago. Where do you draw the line, one year, two? ten? The fact is humans have completely dominated and transformed the natural environment in the much of this country.