(From TFA)... &quot;Given the scale of farming today, treating weeds chemically is really the only practical way for humans to keep them under control&quot;<p>That&#x27;s not true. Cultivators have been used for a long time to keep weeds under control. Chemicals have simply become more convenient for many. This pdf explains a lot about cultivators and is a great read for anyone interested in the topic of weed control.<p><a href="http:&#x2F;&#x2F;www.sare.org&#x2F;content&#x2F;download&#x2F;29730&#x2F;413972&#x2F;file&#x2F;Steel%20in%20the%20Field.pdf" rel="nofollow">http:&#x2F;&#x2F;www.sare.org&#x2F;content&#x2F;download&#x2F;29730&#x2F;413972&#x2F;file&#x2F;Steel...</a>