[jlavine]

I don't have a record of exactly where I read this - it was years ago - but you can find many articles explaining the claim in a similar way by googling "roundup" and "no till". Here are some articles summarizing the pros and cons: - http://sitn.hms.harvard.edu/flash/2015/roundup-ready-crops/ - https://pha.berkeley.edu/2014/03/02/monsanto-corporationroun... - http://web.mit.edu/demoscience/Monsanto/impact.html

The general concept is that tilling/plowing is used to mow over weeds, and killing weeds with chemicals is an alternative.

Your question is a good one. I don't know the answer. The articles listed above describe the environmental and health downsides.

A distinct problem - also described in these articles - that may spell doom for Roundup-Ready crops is the emergence of resistant weeds.

There are alternatives to industrial-scale weed control outside of tilling and herbicides. One way is to grow cover crops in the "off season", then cut them and leave them in a thick mat that starves weeds of sun while also gradually rotting and fertilizing the soil, then cut little holes in this mat where you plant seeds. The USDA NRCS promotes methods like this largely through educational programs. Farmers adopt them because they ultimately save costs on herbicides and fertilizer.

Who knows maybe in a few decades we'll produce all food through some industrial process resembling hydroponics, with energy from Nuclear Fusion replacing sunlight, and weeds will be a distant memory.