Excellent article! It's great to see this technology being put to a really useful application rather than 'try and sell more stuff'
One question about this phrase though: "farming will only get harder as the planet warms and the soils dry" - I don't think that's correct. Warmer planet = more evaporation from the oceans = more rain. With changing climate patterns, there will be places that get drier and places that get wetter, but I would expect global rainfall to be higher, at least offsetting any extra losses through evaporation from soil.
And in any case, it's great to be having technologies such as these described in the article that allows optimal management of farmland on a seasonal basis (ie on a far quicker timescale than climate variations which take decades)