It's pretty common to lie to border agents. Both US and Canadian agents themselves have advised me to do so in the past. Ticking the "Have you been on a farm?"

It's pretty common to lie to border agents. Both US and Canadian agents themselves have advised me to do so in the past. Ticking the "Have you been on a farm?" check box triggers a compulsory search for seeds (both smuggled and inadvertently stuck to your shoes). It is time consuming, and they know it to be a fruitless waste of time.